African Journal of
Agricultural Research

  • Abbreviation: Afr. J. Agric. Res.
  • Language: English
  • ISSN: 1991-637X
  • DOI: 10.5897/AJAR
  • Start Year: 2006
  • Published Articles: 6863

AJAR Articles

Mineral and organic fertilizer in two Physalis species

January 2017

Physalis cultivation can be an alternative of extra income for small and medium producers, mainly with the use of materials available on the property that can replace chemical fertilizer. This study aimed to evaluate agronomic parameters of Physalis peruviana and P. pubescens submitted two different sources of fertilization - chemical and organic. We evaluated plant height, shoot dry mass, production/plant, fruits...

Author(s): ARIATI Ana Claudia, OLIVEIRA Marisa de Cacia, LOSS Edenes Maria Schroll, GOMES Izabela, PACHECO Vacilania and NEGRI Rafaele Cristina

Optimal sample size and data arrangement method in estimating correlation matrices with lesser collinearity: A statistical focus in maize breeding

January 2017

Information about data arrangement methodologies and optimal sample size in estimating the Pearson correlation coefficient (r) among maize traits are still limited. Furthermore, some data arrangement methodologies currently used may be increasing multicollinearity in multiple regression analysis. This study aimed to investigate the statistical behavior of the r and the multicollinearity of correlation matrices among...

Author(s): Tiago Olivoto, Maicon Nardino, Ivan Ricardo Carvalho, Diego Nicolau Follmann, Mauricio Ferrari, Alan Junior de Pelegrin, Vinicius Jardel Szareski, Antônio Costa de Oliveira, Braulio Otomar Caron and Velci Queiróz de Souza

The utilization of tropical legumes to provide nitrogen to pastures: A review

January 2017

Sustainable models of animal production constantly seek for ways to pasture production with inputs reduction. In this context, the introduction of forage legumes in the pasture system is fundamental to fix nitrogen from the atmosphere and supply it to grasses, increasing its production and persistence, enhancing animal nutrition as it grazes, at the same time. Still, the use of plant mixes in the system brings further...

Author(s): Flávia Maria de Andrade Gimenes, Henrique Zavarez Barbosa, Luciana Gerdes, Alessandra Aparecida Giacomini, Karina Batista, Waldssimiler Teixeira de Mattos, Linda Mônica Premazzi and Alberto Nagib de Vasconcellos Miguel

Plant secondary metabolites and its dynamical systems of induction in response to environmental factors: A review

January 2017

Under natural conditions, the plants are, usually, surrounded by a series of potential enemies. They had created strategies of defense against pathogens and herbivores' attacks, allowing its perpetuation throughout evolution. These defense mechanisms are closely associated with the synthesis of secondary metabolites, which are also worldwide used in several areas of industry. This bibliographic review was conducted...

Author(s): Tiago Olivoto, Maicon Nardino, Ivan Ricardo Carvalho, Diego Nicolau Follmann, Vinícius Jardel Szareski, Mauricio Ferrari, Alan Junior de Pelegrin and Velci Queiróz de Souza

Nutritional diagnosis of sugarcane varieties in a Yellow Oxisol during three agricultural seasons

January 2017

Leaf analysis is one of the main methods used for the evaluation of nutritional requirements in sugarcane culture, contributing to a better management of fertilizers. This study aimed to evaluate the nutritional status of sugarcane varieties by quantifying the leaf content of macro and micronutrients of the +3 leaf. The varieties RB92579, RB867515, VAT90-212 and SP813250 were evaluated in a Yellow Oxisol at Fazenda...

Author(s): Vinicius Santos Gomes da Silva, Mauro Wagner de Oliveira, Daniele Costa de Oliveira, Terezinha Bezerra Albino Oliveira, Manoel Gomes Pereira and Carlos Henrique de Castro Nogueira

Relative forage preference by camel (Camelus dromedarius) as influenced by season, sex and age in the Sahel zone of north western Nigeria

January 2017

A study on effect of age, sex and seasonal variation in forage preference of camel was conducted in the Sudano-Sahelian zone of north western Nigeria. A total number of 12 camels were used in the study. Data were collected at an interval of 5 min for each category of animal for 3 consecutive days in dry and rainy seasons using scan sampling method. Based on the observation, the number of plants preferred in this study...

Author(s): Alkali, H. A., Muhammad B. F., Njidda, A. A., Abubakar, M. and Ghude, M. I.

Effects of associated co-inoculation of Bradyrhizobium japonicum with Azospirillum brasilense on soybean yield and growth

January 2017

The continuous development of soybean cultivars aiming at higher yields can result in a demand of N supply higher than the standard inoculation with Bradyrhizobium species. In this context, Azospirillum species, a nitrogen-fixing microorganism found in the rhizosphere of various plant species, may be studied as a way of providing soybean crop with the part of the N it needs. Employing a completely randomized design with...

Author(s): Glaucia Cristina Ferri, Alessandro Lucca Braccini, Fernanda Brunetta Godinho Anghinoni and Lucas Caiubi Pereira

Estimated damage caused by ramularia leaf spots on cotton

January 2017

The objectives of this study are to establish damage functions for the Ramularia areola pathosystem and characterize the damage in cultivars susceptible and resistant to it. The experiment was conducted in the city of Tangará da Serra in the 2012/2013 harvest season. The experimental design was randomized blocks with four replications in a factorial arrangement of four cultivars × four gradients. The plots...

Author(s): Thiago Alexandre Santana Gilio, Dejânia Vieira de Araújo, Kelly Lana Araújo, Thomas Edson Fregonese, Rodrigo Chimenez Franzon and Jaqueline Aguila Pizzato

Effect of organo-mineral fertilizer and poultry litter waste on sugarcane yield and some plant and soil chemical properties

January 2017

Application of organic wastes in sugarcane (Saccharum officinarum) is an alternative possibly replacing or supplementing mineral fertilizers. This study aimed to evaluate the effects of poultry litter, organo-mineral fertilizer and mineral fertilizer on soil chemical properties, yield and plant content of macronutrients in sugarcane. The experiment was conducted at the Jalles Machado Mill in Goianésia- GO, from...

Author(s): Lucélia Alves Ramos, Regina Maria Quintão Lana, Gaspar Henrique Korndörfer and Adriane de Andrade Silva

Physical and chemical characteristics and drying kinetics of turmeric (Curcuma longa L.)

January 2017

This study aimed to characterize the physical and chemical composition, antioxidant activity, essential oil yield, drying kinetics and fit to mathematical models, color parameters, particle size and scanning electron microscopy of fresh turmeric rhizomes (Curcuma longa L.). The physical and chemical composition of turmeric showed technological interest, with standards consistent with those reported in the literature....

Author(s): Maria Siqueira De Lima, Marco Antônio Pereira Da Silva, Geovana Rocha Plácido, Caroline Cagnin, Núbia Ferreira Vieira, Ruthele Moraes Do Carmo, Rânio Cesar Francisco Da Silva, Carlos Frederico De Souza Castro, Márcio Caliari and Richard Marins Silva

Biological control of the bacterial wilt Ralstonia solanacearum by bioprotector with fungi chitosan from Cunninghamella elegans on tomatoes

January 2017

Fertilization is one of the most important means to improve plant production and nutrient uptake. Tomatoes plants are very exigent on fertilizers and sensitive to diseases. For satisfactory yield and fruit quality soil fertility and diseases need to be controlled. The aim of this paper was to evaluate the effectiveness of a bioprotector that contains fungi chitosan as an alternative biofertilizer, which releases...

Author(s): Wagner Silva Oliveira, Iwanne Lima Coelho, Jéssica Rafaella Sousa Oliveira, Maria Camila Barros Silva Leite, Thatiana Montenegro Stamford Arnaud, Newton Pereira Stamford and Emmanuella Vila Nova Silva

Soybean as bioindicador of residual effect of 2,4-D herbicide in an oxisol from the Brazilian cerrado

January 2017

Invasive plants, besides competing for space, also compete for water, light, and nutrients against the crop, what may cause drastic production cuts. Chemical control through herbicides is the most widely used method to control these plants. This study aimed to evaluate the persistence of the 2,4-D (dichlorophenoxyacetic acid) herbicide in soybean (Glycine max L.) crops in an Oxisol from the Brazilian Cerrado. The...

Author(s): Maria Aparecida Peres-Oliveira, Edna Maria Bonfim-Silva, Vinicius Melo da Silva, Tonny José Araújo da Silva and Helon Hébano de Freitas Sousa

Growth comparison of 22 genotypes of conilon coffee after regular pruning cycle

January 2017

A regular pruning cycle (RPC) reduces costs when implementing crop treatments and facilitates semi-mechanized harvesting. However, there is information on plant development under this system. Thus, this study aimed to assess the new branch growth of 22 genotypes of Coffea canephora (conilon) after a regular pruning cycle. The assay was conducted at Cachoeiro de Itapemirim, Southern Espírito Santo State, Brazil....

Author(s): José Maria Dalcomo, Henrique Duarte Vieira, Adésio Ferreira and Fábio Luiz Partelli

Growth of Piper nigrum L. and nutrients cycling by intercropping with leguminous species

January 2017

Nitrogen (N) fixation is performed efficiently by leguminous plants, which can then be used as ‘green manure’ to reduce the need for synthetic fertilizer (especially N) and thus sustainably provide satisfactory crop yields with low production costs. The aim of this study was to determine the effect of intercropping with leguminous species used as cover crops on branch growth and nutrient cycling of pepper...

Author(s): Evelyn Trevisan, Fábio Luiz Partelli, Marcos Góes de Oliveira, Fábio Ribeiro Pires and Heder Braun

Soil green manure and physic-hydric attributes under rubber tree plantation in São Paulo’s western plateau, Brazil

December 2016

São Paulo’s western plateau is a privileged region for rubber tree plantation, since it does not present favourable conditions for the development of plant disease. However, the soil in that region is still scarcely studied. This study has the objective of evaluating the effect of management practices applied between the lines of rubber trees (Hevea brasiliensis) in physic-hydric attributes of a red oxisol...

Author(s): Adriana Aparecida Ribon, José Frederico Centurion, Kathleen Lourenço Fernandes, Leonardo Rodrigues Barros, Amanda Romeiro Alves, Clarice Backes, Alessandro José Marques Santos, Eduardo da Costa Severiano, José Milton Alves, Vladia Correchel

Assessment of fruit postharvest handling practices and losses in Bahir Dar, Ethiopia

December 2016

Demand for fresh fruit is steadily increasing in big cities of Northwestern Ethiopia. As a result, fruits are transported from nearby as well as long distance sources to urban centers such as Bahir Dar. The type of fruit crops available in the market and number of fruit retailers are increasing from time to time. However, the key challenge facing the sector is loss across the supply chain. Therefore, the objectives of...

Author(s): Yigzaw Dessalegn, Habtemariam Assefa, Teshome Derso and Amare Haileslassie

Agronomic performance of hybrids and varieties of maize in function of nitrogen in coverage

December 2016

This study aims to compare the agronomic performance and the productivity of the corn hybrid AG 1051 and the Incaper Capixaba 203 variety in function of different nitrogen (N) doses in coverage. The experiment was held at the Federal Institute of Espírito Santo - Campus Santa Teresa. The design was of randomized blocks and the treatments were arranged in a split plot scheme, with four repetitions. The plots were...

Author(s): Diego Corona Baitelle, Kezia Moraes Vieira, Danilo Força Baroni, Francisco Braz Daleprane, Ismail Ramalho Haddade, Sílvio de Jesus Freitas, Jorge Montoanelli Correa and Flávio Wirlan Andrade da Silva

Characterization of production system and breeding practices of sheep producers in Doyogena district, Southern Ethiopia

December 2016

An exploratory survey was undertaken in Doyogena district of Southern Nation Nationalities Peoples region of Ethiopia to understand the sheep production system, the breeding practices, selection criteria and sheep production constraints in order to develop a sheep breeding strategy. Data were collected from 107 households using semi-structured questionnaire and group discussion. Descriptive statistics and index were...

Author(s): Taye M., Yilma M., Mengistu S., Abiso T., Bassa Z., Wolde S., Rischkowsky B., Dessie T., Okeyo M. and Haile A.

Factors associated with weed occurrence in Southwest region of Goiás

December 2016

After the introduction of Roundup Ready® technology, there were changes in community composition of weeds in the Southwest of Goiás. In this sense, this study aimed at evaluating weed distribution in different cropping systems in this region. Thus, phytosociological survey was conducted in three different periods. Studies were conducted on thirty-five areas derived from combined soybean crops resistant to...

Author(s): Weverton Ferreira Santos, Sérgio de Oliveira Procópio, Alessandro Guerra da Silva and Marcelo Ferreira Fernandes

Phenology, yield and fruit quality of four persimmon (Diospyros kaki L.) cultivars in São Paulo’s Midwest countryside, Brazil

December 2016

The aim of this study is to evaluate the phenology, yield and fruit physicochemical characteristics of four persimmon cultivars (Diospyros kaki L.) in São Paulo’s Midwest countryside, Brazil. The persimmon cultivars studied were ‘Pomelo’, ‘Rama Forte’, ‘Fuyu’ and ‘Rubi’. The main phenological phases of persimmons trees were evaluated. Despite significant...

Author(s): Marlon Jocimar Rodrigues da Silva, Tamires Esther Ferreira, Sofia Domiciano, Ana Paula Maia Paiva, Marco Antonio Tecchio and Sarita Leonel

Root-promoting substances enhance Sugarcane's drought tolerance

December 2016

Sugarcane (Saccharum spp) is an expanding culture for the production of bioethanol around the world which requires certain practices to improve its productive performance at the different ecosystems. This work's aim is to evaluate the initial Sugarcane growth and drought tolerance through the application of biostimulants. For this purpose an experiment was conducted in a greenhouse using completely randomized...

Author(s): Lauricio Endres, Humberto Cristiano de Lins Wanderley Filho, Paulo Ricardo Aprígio Clemente, Breno Kennedy Lima Bezerra and Vilma Marques Ferreira

Technical efficiency of beef cattle production technologies in Nigeria: A stochastic frontier analysis

December 2016

The paper investigated the determinants of beef cattle production and technical efficiency of beef cattle farmers using stochastic frontier production function which incorporates a model of inefficiency effects. A multi-stage random sampling procedure was employed for the selection of 360 respondents comprising 97 nomads, 208 agro-pastoralists and 55 ranchers across the 6 major producing states in Nigeria. The...

Author(s): Cecilia Nwigwe, Victor Okoruwa, Kemisola Adenegan and Adeola Olajide

Crambe performance depending on the potassium doses and cultivation in red latosol

December 2016

Nowadays, the society is seeking renewable energy sources that will replace in a sustainable way, fossil fuels. A source of energy that has stood out with great energetic potential showing itself to be promising in the world is biodiesel. Among several alternatives, the crop, Crambe (Crambe abyssinica Hochst) stands out as an oilseed species plant that belongs to the Brassicaceae family. This culture as a source of...

Author(s): Cristiane Belmonte,  Jéssica Caroline Coppo, Eloi Corvetto de Andrade, Alfredo Richart, Leandro Rampim, Rafaela Goularte Amaral, Danimar Dall Rosa, Eloisa Lorenzetti, Alfredo Alves Neto, Anderson Zimermman, Samara Brandão Queiroz and Jussara Carla Conti Friiedrich

Quality of seedless watermelon cultivated under different doses and phosphorus application forms

December 2016

Effects of doses and phosphorus application forms were studied on the postharvest quality in seedless watermelon hybrid 'Style'. For this, an experiment was conducted in Upanema/RN, Brazil, during the period of September to December 2013, in a randomized block at factorial scheme 5×2 constituting of five phosphorus doses applied in foundation (0, 76, 168, 275 and 397 kg ha-1 of P2O5) and foundation +...

Author(s): Nícolas Oliveira de Araújo, Edna Maria Mendes Aroucha, Sérgio Weine Paulino Chaves, JoséFrancismar de Medeiros, Cristiane Alves de Paiva, Ana Cláudia da Sílva, Antônio RobertoAlves Junior, Natanael Santiago Pereira, Luan Vitor Nascimento and José Carlos Aroucha Filho

Effect of crop type and cultivar surface area on rates of decomposition in soils

December 2016

Sustaining the productive capacity of soils has raised interest in the maintenance of soil organic matter through management practices and use of crop residues. While the impact of management practices has been studied, little is done to understand how the charateristics of the residue itself impact the decomposition at the soil surface. This study relates the chemical composition and the surface area of the aboveground...

Author(s): M. Diack and Diane E. Stott

Irrigation depth and harvest date in sweet potato for conversion to biofuels

December 2016

This study aimed to evaluate the effect of different irrigation depths and harvest dates in sweet potato for conversion to biofuels. Irrigation treatments were 0.25, 0.50, 0.75, and 1.0 of crop evapotranspiration rates and a control treatment (without irrigation). Harvest dates were: 90, 120, 150, 180, and 210 days after planting (DAP). The sweet potato cultivar BRS Cuia (RNC-27.315) was utilized. The experimental...

Author(s): Cicero Urbanetto Nogueira, Helena Maria Camilo de Moraes Nogueira, Richard Alberto Rodríguez Padrón, Sérgio Luiz Jahn and Marcio Antonio Mazutti

Different soil tillage systems influence accumulation of soil organic matter in organic agriculture

December 2016

As a sustainable method of agriculture, organic agriculture aims to increase the soil organic matter through the use of crop rotation, legume cover crop, animal green manure, and organic compost. These practices add organic residues with high organic Carbon (C) which results in a higher soil organic matter content over time primarily due to the no-tillage practices. However, different soil tillage systems, such as...

Author(s): Ademir Sergio Ferreira de Araújo, Luiz Fernando Carvalho Leite, Ana Roberta Lima Miranda, Luis Alfredo Pinheiro Leal Nunes, Ricardo Silva de Sousa, Fabio Fernando de Araújo and Wanderley José de Melo

Dry bean crop productivity simulation for soil and climatic conditions of Tangará da Serra, MT - Brazil

December 2016

The Brazilian national growing of dry bean (Phaseolus vulgaris) currently comes in three annual harvests, which are the wet season, sowing between October and December, the Dry Season, sowing between February and May, and finally the Winter Season, sowing in June to August. The objective of this study was to determine the optimal sowing date for each of the three different sowing seasons wet, dry and winter of dry bean...

Author(s): Andre Luiz Biscaia Ribeiro da Silva, Paulo Sergio Lourenco de Freitas, Paulo Vinicius Demeneck Vieira, Rivanildo Dallacort, Roberto Rezende and Juliana Voroniak

Effects of BAU- biofungicide and Proud on disease severity, seed quality, vigour index and health status of seed against brown spot disease of rice

December 2016

The experiment was conducted with three replication in randomized complete block design in field laboratory of Department of Agronomy, Bangaladesh Agricultural University, Mymensingh. Extracts of garlic (Allium sativum) and neem (Azadirachta indica), BAU-Biofungicide (Trichoderma based preparation) and Proud (Propiconazole) and Bavistin (Bavistin DF) were evaluated under field condition in controlling brown spot disease...

Author(s): Hyat Mahmud, Ismail Hossain, Purnima Dey, A. K. M. Kamal Hasan and Sheikh Afsar Uddin

Irrigation history and pruning effect on growth and yield of jatropha on a plantation in southeastern Brazil

December 2016

Jatropha is an oilseed culture that has been highlighted due some specific agronomic aspects. This plant produces high oil quantities in its seeds that is used for biodiesel production. One of the major challenges regarding to the Jatropha cultivation is the lack of information on many management techniques, especially the irrigation and pruning management in adult plants in southeastern Brazil. The objective of this...

Author(s): Otávio Neto Almeida Santos, Marcos Vinícius Folegatti, Bruno Patias Lena, Jefferson Vieira José, Eder Duarte Fanaya Júnior, João Paulo Francisco, Irineu Pedro de Sousa Andrade and Renata Alcarde Sermarini

Adaptability and stability parameters for immature seeds and pods and mature dried seeds in cowpea genotypes in Brazil northeast

December 2016

The aim of this study was to estimate adaptability and stability parameters in genotypes of cowpea for the yield of immature seeds and pods and mature dried seeds, in order to enable the recommendation of cultivars for the region of São Francisco Submedium valley. We evaluated 30 cowpea genotypes, being fourteen lines of Embrapa Semiarid, six commercial cultivars and 10 landraces in the municipalities of...

Author(s): Deisy Aiane Lima de Aquino, Carlos Antonio Fernandes Santos and Danillo Olegário Matos da Silva

White thread blight disease caused by Marasmiellus scandens (Massee) Dennis & Reid on cocoa and its control in Ghana

December 2016

White thread blight disease (WTBD) is currently emerging as an important foliar disease on cocoa in Ghana. The disease has been known in the country for many years. Yet, the incidence and severity levels on cocoa in the growing regions are not known. Surveys and sampling were conducted between 2011 and 2013 to estimate incidence and severity of WTBD in the six cocoa growing regions (Ashanti, Brong-Ahafo, Central,...

Author(s): Amoako-Attah I., Akrofi A. Y., Rashid Bin Hakeem, Mercy Asamoah and Kumi-Asare E.

Influence of environmental factors on carpetgrass seed germination

December 2016

The aim of this study was to verify the influence of temperature, light, substrate, sowing methods, and salt and water stress on carpetgrass (Axonopus affinis, in the Poaceae family) seed germination. All four trials were performed in a germination chamber under controlled conditions of temperature, moisture and photoperiod. Experimental designs were entirely randomized with 100 seeds per plot. For the study of...

Author(s): Suzana Targanski Sajovic Pereira, Gilberto Rostirolla Batista de Souza, Carla Rafaele Xavier Costa, Marina Romano Nogueira, Renata Bachin Mazzini-Guedes and Kathia Fernandes Lopes Pivetta

Soil chemical properties under a no-tillage system: Forage grass seeding modes of gender urochloa intercropped with maize

December 2016

Different farming practices and soil management can make changes in the chemical properties of the soil. In this sense, the monitoring of these possible changes is essential for proper soil correction and/or using systems that are more sustainable. The objective of this work was to verify the behavior of the chemical attributes of a Latosol (Oxisol) under a no-tillage system of plantation, by intercropping maize with...

Author(s): Paulo Ricardo Alves dos Santos, Francisca Edcarla de Araujo Nicolau, Marcelo Queiroz Amorim, Clice de Araújo Mendonça, José Evanaldo Lima Lopes, Elivânia Maria Sousa Nascimento, Carlos Alessandro Chioderoli, Leonardo de Almeida Monteiro

Spatial variability of soil physical and hydraulic properties in the southern Brazil small watershed

December 2016

In order to provide an adequate usage to agricultural soils it is crucial to comprehend the soil physical attributes and their spatial variability. The variability of soil attributes is dependent on several formation processes and interactions. To properly describe such complex variability, the statistical methods used must incorporate the spatial and temporal influences. In this context, the present study was developed...

Author(s): Bartels Guilherme Kruger, Terra Viviane Santos Silva, Cassalho Felício, Lima Luciana Shigihara, Reinert Dalvan José and Collares Gilberto Loguercio

24-Epibrassinolid in the biometry of acclimatization to salinity in two cultivars of Vigna unguiculata (L.) Walp.

December 2016

In order to evaluate the influence of application of brassinosteroid phytohormone in mitigating the effects of salt stress at the height, root growth, leaf area, dry mass of leaf and root, stomatal conductance and transpiration, plants of cowpea bean [Vigna unguiculata (L.)Walp, cultivars BR3 Guariba and BRS Tracuateua, they were sown in a greenhouse in the absence and presence of brassinosteroid (24-epibrassinolid) in...

Author(s): Liliane C. Machado, Jéssica T. da Silva Martins, Susana S. Conceição, Kerolém P. Sousa Cardoso, Thays C. Costa, Glauco A. dos Santos Nogueira, Vitor R. Nascimento, Antonio Vinicius C. Barbosa, Benedito G. dos Santos Filho and Cândido F. de Oliveira Neto

Chemical attributes of Oxisol under different tillage systems in Northeast of Pará

December 2016

The different tillage systems interfere with soil chemical attributes mainly due to the site of preparation techniques. The aim of this study was to determine, in two time evaluation periods, the changes in soil chemical attributes affected by three tillage systems in Yellow Oxissol. The experimental design consists of a randomized block design, with split-plot (Soil Tillage systems X Depths samples) with 3 repetitions...

Author(s): Augusto José Silva Pedroso, Maria de Lourdes Pinheiro Ruivo, Jorge Luiz Piccinin, Ricardo Shigueru Okumura, Sannah Mohamad Birani, Mário Lopes da Silva Júnior, Vânia Silva de Melo, Adriane da Rocha Costa and Marcos Paulo Ferreira de Albuquerque

Legumes as green manure for common bean cultivated in two growing seasons at southeast Brazil

December 2016

The use of legumes in pre-cultivation on the common bean has the possibility of providing atmospheric N to the soil, making it available to this crop, and may cover part of its N demand and increase grain yield. The objective of present study was to evaluate the effect of hyacinth bean and jack bean as green manures on the production of common bean grown in two seasons. Cover crops were evaluated for fixed N2, dry...

Author(s): Filipe Fernandes de Sousa, Davi Lopes do Carmo, José Eustáquio de Souza Carneiro, Segundo Urquiaga and Ricardo Henrique Silva Santos

Field evaluation of cowpea varieties for adaptation to the forest/savanna transition agroecology of Osun state, Nigeria

December 2016

Cowpea (Vigna unguiculata [L.] Walp) is an important food legume in tropical and sub-tropical Africa. It is grown for food, fodder, a cover crop and consumed as dried seeds rich in carbohydrates, proteins and vitamins. Production of cowpea has not been practiced on a large scale in the forest/savanna transition agro ecology of Nigeria due to high relative humidity, diseases and insect damage. In 2012 and 2013 cropping...

Author(s): Titilayo Elizabeth Sangoyomi and Alabi Olufunmilola,

Use of cattle waste on the farm

December 2016

Lack of fertile soil is among the main problems in world agricultural production areas, mainly in vegetable crop production areas. In this sense, we aimed to evaluate the the production of chili (Capsicum annuum L.) using cow urine as an organic fertilizer. The survey was conducted from June to September 2014 at the School State of Primary and Secondary Nossa Senhora da Conceição, Belém de Brejo do...

Author(s): Lunara de Sousa Alves, Mário Leno Martins Véras, José Sebastião de Melo Filho, Nelto Almeida de Sousa, Lucimara Ferreira de Figueiredo, Rosinaldo de Sousa Ferreira, Rayane Amaral Andrade, Leandra de Melo Cavalcante Sousa, Alvaro Carlos Gonçalves Neto and Thiago Jardelino Dias

Root spatial distribution in coffee plants of different ages under conservation management system

December 2016

Root system growth and soil structure are interdependent and the threshold of separation between both of them is complex. However, by the evaluation of soil pore space, it is possible to characterize the root system growth environment. The aim of this study was to evaluate the effect of conservation management system over time on pore distribution and on root system development of coffee plantation in Cerrado Oxisol,...

Author(s): Érika Andressa da Silva, Sérgio Henrique Godinho Silva, Geraldo César de Oliveira and Carla Eloize Carducci

Analytical approaches for modeling tree crown volume in black wattle (Acacia mearnsii De Wild.) stands

December 2016

In this paper, four strategies were proposed for modeling tree crown volume using as independent variable stem variables, crown variables, combination of stem and crown variables, and stem volume. We used a dataset comprised of 170 trees from 12 temporary plots located in forest stands in southern Brazil. Models composed of stem variables presented weaker predictive ability. The best model contained crown variables,...

Author(s): Guilherme C. Cadori, Carlos R. Sanquetta, Sylvio Péllico Netto, Alexandre Behling, Sérgio Costa Júnior and Ana Paula Dalla Corte

Chemical and microbiological changes in a sandy soil with pig liquid waste application in Southern Brazil

December 2016

Liquid residue from pig farming contains nutrients that can be used for the fertilization of cultivated soils. The aim of this study was to evaluate chemical and microbiological changes in a sandy soil under pasture with Bermuda Grass (Cynodon spp) that received doses of pig liquid waste (PLW). The experiment was conducted in Cianorte-PR, Brazil, in a Typic Hapludox soil with sandy texture. The treatments consisted of...

Author(s): Matos Maria Aparecida de, Colozzi Filho Arnaldo, Barbosa Graziela Moraes de Cesare, Caviglione João Henrique, Nogueira Marco Antônio, and Andrade Diva Souza,

Effect of nitrogen and potassium fertilizations on elephant grass genotypes used for energy purposes in Northern Rio de Janeiro State, Brazil

December 2016

Similar to many other human activities, the energy sector has a global concern with environmental issues. The use of renewable energy sources such as biomass is an alternative to the use of fossil fuels. Eight elephant grass genotypes showing energy production potential were herein assessed. The genotypes were grown from February 2014 to March 2016 in Campos dos Goytacazes County – Rio de Janeiro State, Brazil....

Author(s): Brunno de Oliveira Almeida, Rogério Figueiredo Daher, Antônio Alonso Cecon Novo, Geraldo de Amaral Gravina, Marcelo Vivas, Cássia Roberta de Oliveira Moraes, Bruna Rafaela da Silva Menezes, Eduardo Peres Furlani, Maria do Socorro Bezerra de Araújo and Verônica Brito da Silva

Prevalence and variability of the common bean rust in Uganda

December 2016

Uganda is the second largest producer of dry beans (Phaseolus vulgaris L.) in Africa, but common bean rust caused by Uromyces appendiculatus (Pers. Unger), is negatively impacting the production of the crop. There is little information on the occurrence and identity of the rust pathotypes present in the country. Consequently, a field survey was carried out during the 2015 second planting season in fifteen districts,...

Author(s): Blessing Adanta Odogwu, Stanley Tamusange Nkalubo, Clare Mukankusi, Pamela Paparu, Rubaihayo Patrick, James Kelly and James Steadman

Plant defense elicitors’ purification in soybean and bean from pathogenic nematode

December 2016

Plant resistance induction against pathogens is an alternative disease control method, which involves the activation of the plant defense mechanisms, such as the phytoalexins induction. The eliciting molecules have the capacity of inducing and activating such responses and thus, techniques have searched to isolate and characterize fractions with eliciting aspect. This study aimed to purify, through ion exchange...

Author(s): Edilaine Della Valentina Gonçalves-Trevisoli, José Renato Stangarlin, Bruna Broti Rissato, Omari Dangelo Forlin Dildey, Sidiane Coltro-Roncato, Laline Broetto, Heloísa Ferro Constâncio Mendonça-Müller, Janaína Dartora, Cristiane Cláudia Meinerz, Luciana Iurkiv, Thaisa Muriel Mioranza, Daliana Hisako Uemura-Lima, Tulya Fernanda Barrientos Webler and Odair José Kuhn

Effects of the application of treated domestic sewage via surface and subsurface drip irrigation on the solution and chemical properties of the soil in an orange plantation

December 2016

The use of treated domestic sewage (TDS) in agriculture by drip irrigation in the soil subsurface can serve as an extra treatment and also provide higher availability of water and nutrients to plant roots. It represents safer and healthier cultivation for crops, producers and consumers, and allows the direction of better quality water for domestic consumption. This study aimed to analyze the possible effects of TDS...

Author(s): Reginaldo Ferreira Santos, Andreia Aparecida Ferreira da Silva, Edson Eiji Matsura, Aline Azevedo Nazário and Samuel Nelson Melegari de Souza

Induction of coffee wilt disease infection using different types of contaminant in field conditions in Democratic Republic of Congo

December 2016

A study was conducted on the induction of coffee wilt disease (CWD) infection with different types of contaminants using a randomized complete block design with four replications. Coffee seedlings were inoculated with infected bark, sub-bark tissues, wood necrotic and an artificial inoculum. Statistical analysis did not show significant differences (P>0.05) between treatments. Results obtained show that all...

Author(s): Marcel Muengula-Manyi, Augustin Ngombo-Nzokwani, John Kiamana-Mantata, Patrick Tshilenge-Djim and Adrien Kalonji-Mbuyi,

Quality of mechanized peanut digging in function of the auto guidance

December 2016

Within the context of precision agriculture, the use of automatic guidance is without a doubt one of the most popular tools among farmers, however, are few producers of peanuts using this technology, the benefits from this technology can bring significant gains for culture even more when thinking about reducing the indices of losses in the digging. Thus, it objective was to evaluate the variability of quantitative...

Author(s): Santos A. F., Kazama E. H., Ormond A. T. S., Tavares T. O. and Silva R. P.

Spatial distribution of soil chemicals attributes in sugar cane crop area

December 2016

The aim of this paper was to quantify and evaluate the spatial distribution of soil chemical properties in different grid sampling sizes using descriptive statistics and geostatistics. The study was carried out in Bom Sucesso City, Paraná State, Brazil. Using GPS, a 50 x 50 m grid sampling size was set, comprising four samples per hectare. In each grid point positioned on the field, soil samples at a depth of 00...

Author(s): Anderson Antônio da Silva Gualberto, Marcos Rafael Nanni, Carlos Antonio da Silva Junior, Everson Cezar, Luis Guilherme Teixeira Crusiol, Guilherme Fernando Capristo Silva and Aline de Carvalho Gasparotto

Page 33 of 138, showing 50 records out of 6863 total, starting on record 1601, ending on 1650