African Journal of
Agricultural Research

  • Abbreviation: Afr. J. Agric. Res.
  • Language: English
  • ISSN: 1991-637X
  • DOI: 10.5897/AJAR
  • Start Year: 2006
  • Published Articles: 6801

AJAR Articles

Seed health tests of traditional leafy vegetables and pathogenicity in plants

April 2018

Traditional leafy vegetables play a significant role in the daily diets of many people in Zimbabwe. They are produced by smallholder farmers with limited knowledge on the agronomic value of high-quality seed, on seed storage, and on plant- and seed-borne pathogens. The quality of the seed is rarely tested for seed-borne pathogens posing risks of pathogen build-up. This study was conducted in order to determine the...

Author(s): Praxedis Dube, Paul C. Struik and Elizabeth Ngadze

A survey of the insect pests and farmers’ practices in the cropping of yellow pepper Capsicum annuum Linnaeus in Enugu State of Eastern Nigeria

April 2018

Yellow pepper (Capsicum annuum L.) is the second market gardening crop after tomato, and subsequently, a major source of income to farmers in Nigeria. Pests and diseases reduce yields and quality of marketable fruits. A study was conducted in Ibagwa-Agu, Lejja, Edem, Alor-Uno and Eha-Alumona agro-based communities of Nsukka Local Government Area to assess the economic implications of insect infestation and control...

Author(s): Ekenma Julia Agwu, Gregory Ejikeme Odo, Felicia Ekeh, Gerald Nnadi Attamah, Michael Uwagbae and Chukwuemeka Eze

Quality of Soil in the function of biological fertilization and plant covering

April 2018

The yield of soybean was influenced by the chemical and microbiological properties of the soil, which was favored by management techniques that promote improvement in soil quality. The objective of this study was to evaluate soybean yield, chemical and microbiological quality of the soil as a function of biological fertilization and soil cover conditions. The experiment was conducted in both crops seasons 2015/16 and...

Author(s): João Paulo Ascari, Dejânia Vieira de Araújo, Inês Roeder Nogueira Mendes, Marcos Vinícius Foschiera, Rafael Sbruzzi Prieto, Wagner Henrique Moreira Barboza, Willian Krause and Leopoldo Sussumu Matsumoto

Agronomic efficiency of Bradyrhizobium pre-inoculation in association with chemical treatment of soybean seeds

April 2018

The competitiveness of Brazilian soybean in the international market is highly dependent on biological nitrogen fixation, whose efficiency is related to factors that affect the survival of the bacteria, such as the chemicals used in the treatment of seeds. The study objective was to evaluate Bradyrhizobium pre-inoculation (10 days before sowing) of soybean seeds treated with fungicides and insecticide compared to the...

Author(s): Krisle da Silva, Edmilson Evangelista da Silva, Eliane do Nascimento Cunha Farias, Josimar da Silva Chaves, Christian Nilton Batista Albuquerque and Carina Cardoso

Environmental conditions of the interior of the tropical forest and regeneration of tree species

April 2018

This study aimed to analyze the interactions between environmental variables and the occurrence of tree species in the understory of an Atlantic forest fragment in Southeastern Brazil. The vegetation data collection was carried out in ten locations, with trees having diameter at breast height (DBH) larger than 5 cm and with distinct physiographic characteristics, orientation and slope. The following variables were...

Author(s): José Eduardo Macedo Pezzopane, Gilson Fernandes da Silva, Eduardo Alvarez Santos, Miguel Angel Herrera Machuca and Talita Miranda Teixeira Xavier

Effects of mineral salts on forage seeds germination

April 2018

The objective of this study was to evaluate seed germination of three different forage species subjected to saline stress. The seeds remained in salt for 0 to 24 h and were then deposited in field beds. After 15 days, the germination was evaluated from its emergence. The effect of NaCl on germination was evaluated for the following treatments: a) 0 h (control); b) permanence in NaCl for 6 h; c) permanence in NaCl for 12...

Author(s): Suzana Cristina Quintanilha, Erico da Silva Lima, Vanessa Aparecida Feijó de Souza, Tiago Neves Pereira Valente, Bruno Borges Deminicis, Andrea Roberto Bueno Ribeiro, Vitória Gallo Borges de Lima and Agatha Nara Pirondi

Fungistatic activity of essential oil of Lippia sidoides Cham. against Curvularia lunata

April 2018

Synthetic pesticides used in agriculture to control pathogens are being widely questioned for their harmful effects on human health and the environment. Therefore, the objective of this study was to evaluate the fungistatic activity of Lippia sidoides Cham. essential oil on alternative control of Curvularia lunata (Wakker), the causal agent of spot in maize plants. The fungitoxic contact effect was successful, resulting...

Author(s): Talita Pereira de Souza Ferreira, Dalmarcia de Souza Carlos Mourão, Gil Rodrigues dos Santos, Luiz Gustavo de Lima Guimarães, Ellen Caroline Feitoza Pires, Weder Ferreira Santos and Raimundo Wagner de Souza Aguiar

Influence of reducing sugar contents on sprout growth of blackberry cuttings

April 2018

The objective of this study was to analyze the use of different doses of indolebutyric acid (IBA) and its influence on reducing sugar contents and the relationship of root and leaf development of mulberry cuttings, using commercial substrates and sand. The experimental design was a completely randomized design, with 3 replicates per plot and 5 cuttings per replicate, in a 3 × 3 factorial scheme, consisting of...

Author(s): Luiz Carlos Pereira, Henrique Menoncini, Fabiola Fernandes Abreu, João Victor de Souza Martins, Rodrigo Gonçalves Mateus, Marcos Barbosa-Ferreira, Cristiano Marcelo Espínola Carvalho, Ricardo Dias Peruca, Cleber Junior Jadoski and Denílson Guilherme

Early prediction of internal bruising in potatoes by biospeckle laser technique

April 2018

The internal bruising in potatoes is a kind of damage caused by the mechanical impact, which is the major cause of post-harvest losses. This kind of injury is hard to detect because it occurs due to the internal cellular rupture of the tuber. This research aims at evaluating the applicability of the biospeckle laser technique in order to detect and predict the internal bruising in potatoes caused by mechanical impacts...

Author(s): Anderson Gomide Costa, Roberto Alves Braga Jr., Eduardo V. B. Vilas Boas and Murilo Risso

Agricultural Knowledge and Technology Transfer Systems in the Southern Ethiopia

April 2018

Agriculture is the mainstay of the Ethiopian economy. However, the growth of the sector is constrained by different factors. Low level of technology development, inefficient technology dissemination, low utilization of improved production inputs and shortage of research proven production practices are among the most important factors hindering the growth of the sector. The objective of this study was, therefore, to...

Author(s): Tewodros Ayalew and Tesfaye Abebe  

Socio-economic and environmental impacts of invasive plant species in selected districts of Bale Zone, Southeast Ethiopia

April 2018

Understanding the socioeconomic and environmental impacts of invasive plant species from the affected communities’ perspectives is essential to design and plan sustainable control and prevention strategies. Hence, understanding the socio-economic and environmental impacts in the infested and susceptible areas such as Bale zone is very crucial. Therefore, the objective of this study was to assess socio-economic...

Author(s): Mohammed Mussa, Habtamu Teka and Ahimed Aliye

Physical, chemical, and microbiological evaluation of a compost conditioned with zeolites

April 2018

Zeolites are minerals characterized by high cation exchange capacity (CEC). This study evaluated possible effects of zeolites on improving the composting process in terms of the physical, chemical, and microbiological quality of compost and the productivity of the test plant, Raphanus sativus L. Compost enriched with 1.5% ground zeolites exhibited 62% greater degradation of organic particles sized less than 0.125 mm and...

Author(s): Fabricio T. Ramos, Oscarlina L. S. Weber, Eduardo B. Morais, Eliana F. G. C. Dores, Zoraidy M. Lima and João M P Novais

Effects of lime and fertilizer on soil properties and maize yields in acid soils of Western Kenya

March 2018

Many soils in Western Kenya are acidic and deficient in nitrogen and phosphorus. Acidity hinders crop responses to fertilizers applied to remedy nutrient deficiencies. The common liming materials used to ameliorate acidity are Calcium Oxide (CaO) and Calcium Carbonate (CaCO3) in powdery formulations. Broadcasting these materials by hand followed by incorporation is recommended on smallholder farms to enhance their...

Author(s): Peter A. Opala, Martins Odendo and Francis N. Muyekho  

Organomineral fertilization in growth, physiology and phytomass production of castor oil plant BRS energia

March 2018

This work aims to study the effect of castor oil plant cake doses (0.0; 1,100; 2,200 and 3,300 Kg ha-1) associated with P doses (0.0 and 90 Kg ha-1) and K doses (0.0 and 60 Kg ha-1) on initial growth period of castor oil plant BRS Energia. The experiment was conducted under greenhouse's conditions at the Embrapa Algodão, located in Brazil. The experimental design of randomized blocks was used in a 4x2x2...

Author(s): Márcia Maria Bezerra Guimarães, José Félix de Brito Neto, Cláudio Silva Soares,  Alde Cleber Silva de Lima, Fabrícia de Fátima Araújo Chaves,   Adryageisa Figueiredo Cavalcante,  André Luiz Pereira da Silva and  Joaquim Alves de Lima Junior  

Improving salt tolerance and weight percent reduction in tomato by exploiting physio-agronomic seedling traits

March 2018

Salinity being a serious limitation to crop production is an established fact since ages. It has adversely affected the adaptive behavior of our field crops particularly at seed germination and seedling stages. Identification of particular plant traits conferring salinity tolerance is important for inducing genetic variation among the target traits and adjusting the selection pressure for them in field. This...

Author(s): Muhammad Ahsan Raza, Asif Saeed, Hassan Munir, Adeela Munawar, Atif Kamran, Fazal Rehman and Awais Riaz  

Effects of aqueous and oil leaf extracts of Pterocarpus santalinoides on the maize weevil, Sitophilus zeamais pest of stored maize grains

March 2018

The effects of aqueous and oil leaf extracts of Pterocarpus santalinoides at concentrations of 5, 10, 15 and 20%v/v, each as proctectant in the control of the maize weevil, Sitophilus zeamais, were compared with a conventional insecticide, pirimiphos-methyl at a rate of 0.5 ml / 50 g maize grains of Oba Super II variety in a Completely Randomized Design with four replicates. Parameters assessed, include adult mortality,...

Author(s): Ekeh Felicia Nkechi, Odo Gregory Ejike, Nzei Joy Ihuoma, Ohanu Chinenye Maria-goretti, Ugwu Francis, Ngwu Godwin and Reginald Njokuocha  

Effect of seedling fibrous roots on field performance of hybrid coffee varieties

March 2018

The objective of this study was to evaluate the effect of number of fibrous roots per seedling on plant growth and yield components of hybrid coffee varieties. A split plot experiment in a randomized complete block design (RCBD) with three replications was used. The main factor consisted of five varieties (N39-2, N39-3, N39-7, KP423-1 and KP423-2) whereas the sub-factor consisted of four types of roots (seedlings with...

Author(s): Jeremiah M. Magesa, Theodosy J. Msogoya and Cornel L. Rweyemamu  

Efficacy of the decoction of cashew leaf (Spondias mombin L.) as a natural antiseptic in dairy goat matrices

March 2018

Microorganisms resistant to conventional antimicrobial substances are becoming more prevalent. Accordingly, natural alternatives have been sought with the use of extracts from medicinal plants whose purpose is to find new compounds with recognized antimicrobial activity. This work aims to show the efficacy of the cajá (Spondias mombin L.) leaf decoction using the microplate dilution technique against...

Author(s): Camila Fernandes Leonêz, Francisco Marlon Carneiro Feijó, Nilza Dutra Alves, Caio Sergio Santos, Gardênia Silvana Oliveira Rodrigues, Fernando da Costa Fernandes and  Tayná Moura Matos  

Allelopathic effects of aqueous extract of leaves and roots of Luetzelburgia auriculata (Allemão) Ducke on seeds germination and initial growth of lettuce (Lactuca sativa L.)

March 2018

The secondary metabolism of plants produces allelopathic substances which are able to interfere with germination and growth of other species, when released in the environment. In order to evaluate the allelopathic effects of Luetzelburgia auriculata on the germination and early growth of lettuce (Lactuca sativa), leaf extracts and roots were tested in lettuce seeds sowing. The L. auriculata plant material was collected...

Author(s): PINTO Érika do Nascimento Fernandes, SOUTO Jacob Silva, PEREIRA Leonardo Francisco de Assis, BORGES César Henrique Alves and FERNANDES Tássia Rayane Nascimento  

Plant extracts enhancers of defense response in ponkan mandarin Seedlings against Alternaria alternate f. spp. citri infection

March 2018

The objective of this study was to determine the elicitor potential of plant extracts from Caatinga biome by enzyme activity and epidemiological components of Alternaria brown spot (Alternaria alternate f. spp. citri). These were prepared ethanolic, dichloromethanic, and aqueous extracts from 14 plants (Anadenanthera macrocarpa, Schinopsis brasiliensis, Maytenus rigida, Caesalpinia pyramidalis, C. ferrea, Peltophorum...

Author(s): Kedma Maria Silva Pinto, Paulo Alexandre Fernandes Rodrigues de Melo, Janaína Marques Mondego, Luciana Cordeiro do Nascimento, Maria Izabel Mendes Marques Cortez, Alfredo Augusto de Carvalho Aires, Antônio Pereira dos Anjos Neto, Robson Luís Silva de Medeiros, José Ribamar Gusmão Araújo and Hilderlande Florêncio da Silva  

Addressing soil organic carbon issues in smallholders’ farms in Ethiopia: Impact of local land management practices

March 2018

Soil organic carbon plays a key role in plant biomass production. On smallholder farms, crop and livestock are traditionally integrated and support each other. However, due to changes in socio-economic factors, this relationship is lost as resources are mismanaged. The present study was conducted in the Central Ethiopian highlands that represent about 90% of the country’s smallholder farmers. The objective of this...

Author(s): N. A. Minase, M. M. Masafu and A. Tegegne  

The effects of intercropping and plant densities on growth and yield of maize (Zea mays L.) and soybean (Glycine max) in the humid forest zone of Mount Cameroon

March 2018

A field experiment was conducted to evaluate the effects of intercropping and planting densities on the growth and yield of maize (Zea mays) and soybeans (Glycine max).  A 1 ha plot located at the Institute of Agricultural Research for Development (IRAD), Ekona, South West Region of Cameroon was used. There were two blocks: block 1 which was fertilized with 60 kg/ha NPK (20:10:10) and top dressed with urea at 50 kg...

Author(s): Eneke E. Bechem, Agbor N. Ojong and Kingsley A. Etchu

Screening for salinity tolerance of Oryza glaberrima Steud. seedlings

March 2018

Rice (Oryza sativa) is a salt-sensitive species and improvement of salt resistance is a major goal for plant breeders. Some species of Oryza genus may constitute an interesting source of genes involved in stress resistance for cultivated rice improvement. The African rice Oryza glaberrima is poorly described for its response to salt stress. Twenty-five accessions of O. glaberrima were exposed during 2 weeks to 0 or 60...

Author(s): Hermann Prodjinoto, Christophe Gandonou and Stanley Lutts

Incidence and severity of maize streak disease: The influence of tillage, fertilizer application and maize variety

March 2018

Maize streak disease (MSD) is one of the most destructive diseases of maize (Zea mays L.) estimated to cause a yield loss of about 20% in Ghana. Field experiment was conducted at Nkwanta in the Volta Region of Ghana during the cropping seasons of 2015 to assess the effects of tillage practices, fertilizer application and maize variety on the incidence and severity of MSD. The MSD severity was assessed using 1 to 5...

Author(s): D. Blankson, E. Asare-Bediako, K. A. Frimpong, E. Ampofo, K. J. Taah and G. C. Van der Puije  

Planting density and number of stems for ecological crop determinate growth tomato

March 2018

Tomato growers adopting an ecologically based system have opted for determinate growth varieties due to their ease of staking and sprouting, and due to the fact that they have a shorter cycle, which reduces phytosanitary problems that usually occur towards the end of the growing season. This study aimed to evaluate yield components and fruit quality of ‘Floradade’ determinate growth tomato in an ecologically...

Author(s): Denise de Souza Martins, Maristela Watthier, José Ernani Schwengber, Diego Rosa da Silva, Ryan Noremberg Schubert and Roberta Marins Nogueira Peil

Determinants of small-scale farmers’ adaptation decision to climate variability and change in the North-West region of Cameroon

March 2018

Small-scale farmers’ adaptation decision in the face of climate variability and change (CVC) depends largely on their ability to perceive the impacts of CVC as well as their degree of vulnerability to these impacts. This research looks at the factors that influence small-scale farmers’ adaptation decision faced with climate variability and change, with particular focus on Mbengwi Central Sub-Division,...

Author(s): Nyong P. Awazi and Martin N. Tchamba

Genetic divergence in Agave accessions through ISSR markers and phenotypic traits

March 2018

The Agave genus is composed of about 200 species, but the cultivation of sisal for fiber production in Brazil is restricted to two species: Agave sisalana and Agave fourcroydes, both have several accessions with wide variability. The collection of Agave of Embrapa has 37 accessions maintained in situ and periodically evaluated agronomical traits. Most of these accessions have phenotypic similarities, although they...

Author(s): Silmara Chaves de Souza, José Jaime Vasconcelos Cavalcanti, Jean Pierre Cordeiro Ramos, Isaías Alves, Roseane Cavalcanti dos Santos and Liziane Maria de Lima  

Precocious screening tests of the resistance of two varieties of cocoa seedlings (Theobroma cacao L.) from combinations of fertilizers against Phytophthora megakarya (Brasier and Griffin) in nursery

March 2018

Experiments were conducted to appreciate the resistance level of cocoa seedlings aged three months from combinations of fertilizers against Phytophthora megakarya based on artificial leaf disk inoculation test. The two cocoa varieties involved were: Tafo 79/501 (V1) and SNK 13 (V2). For each variety, 11 treatments with three replicates were used on 33 randomly-selected plants. These include Arbuscular Mycorrhizal Fungi...

Author(s): Pélagie Djenatou, Yves Hernandez Tchétchoua, Philippe Kosma and Eddy Léonard Ngonkeu Magaptcheu,  

Maize ideotype breeding for changing environmental conditions

March 2018

The demand for corn in the developing world will double by the end of 2050. The challenges due to the climate change are real. Where extreme weather events will become more frequent and climate change projections suggest that large yield losses occur in many regions of the world. Corn is cultivated throughout the world and is a strategic crop: can tolerate high radiation intensities and exhibits high efficiency in the...

Author(s): Khunsa Khakwani, Muhammad Rafique, Ahsan Raza Malhi, Muhammad Altaf, Saira Saleem and Muhammad Arshad  

Population fluctuation and infestation of Drosophila suzukii in berry crops in Southern Brazil

March 2018

Drosophila suzukii is an insect pest with high capacity to cause damage to soft-skinned fruit whose behavior on host crops in Brazil is still unknown. This study aims to determine the population fluctuation of D. suzukii on different berry ¬¬¬¬¬¬crops from 2014 to 2017 and infestation. In each orchard, two traps containing attractant (biological yeast + sugar + water) were installed each week;...

Author(s): Daniela Fernanda Klesener, Régis Sivori Silva dos Santos, Luciano Gebler and Lucas de Ross Marchioretto  

Leaf content of macronutrients in Tabebuia aurea seedlings grown on different substrates and luminosities

March 2018

Taking into consideration that species react differently to the substrate and luminance variations, this study aimed to evaluate the leaf content of some macronutrients and dry matter in Tabebuia aurea seedlings through the hypothesis that the growth environment can alter the concentration of chemical elements in the species. The study was conducted in a greenhouse, in randomized blocks, factorial 2 × 3 (two light...

Author(s): Ademir Kleber Morbeck De Oliveira, Sônia Cristina Juliano De Gualtieri, José Antônio Maior Bono, Valtecir Fernandes, Paula Thais Alves Ojeda and Rosemary Matias  

Effects of lime, vermicompost and chemical P fertilizer on yield of maize in Ebantu District, Western highlands of Ethiopia

March 2018

Integrated use of lime with organic and chemical fertilizers is considered as a good approach for sustainable crop production under acidic soils. Vermicompost (VC) and chemical phosphorus (P) fertilizer when used with lime play a vital role in enhancing productivity of acidic soils. Field experiments were conducted for two consecutive cropping seasons of 2015 and 2016 to evaluate the effects of lime, VC and chemical P...

Author(s): Abdissa Bekele, Kibebew Kibret, Bobe Bedadi, Tesfaye Balemi and Markku Yli-Halla

Efficacy of Xylopia aethiopica ethanolic and aqueous extracts on the control of Sitophilus oryzae in stored rice grain

March 2018

Stored product insects reduced the quantity, quality, nutritive value and viability of stored crops such as maize, sorghum, wheat and rice. These pests and many others threaten food security. The study investigated the efficacy of Xylopia aethiopica in the control of Sitophilus oryzae on stored rice. The extracts of this plant were made using ethanol and aqueous as solvent and prepared at the concentrations of 3, 6, 8...

Author(s): Ekeh F. N., Odo G. E., Nzei J., Ngozi E., Ohanu C. and Onuoha O.

Diversity of insects in conventional and organic tomato crops (Solanum lycopersicum L., solanaceae)

March 2018

This study aims to compare the diversity and relative abundance of insect families collected in organic and conventional tomato production systems located in Alagoas, Northeast Brazil (09°81'76"S and 36°59'42"W). In this region, the visible spectrum is quite broad with sunlight throughout the year. Between rows of tomato plants, we set up a system of colored traps colored blue, yellow, white,...

Author(s): Rubens Pessoa de Barros, Ligia Sampaio Reis, Isabelle Cristina Santos Magalhães, Miriany de Oliveira Pereira, Ana Cleia Barbosa de Lira, Claudio Galdino da Silva, Jaciara Maria Pereira e Silva, João Gomes da Costa and Elio Cesar Guzzo

Cotton growth in response to water supply in red Latosol cerrado

March 2018

There are few studies that demonstrate the influence of water stress in biometric variables and cotton growth. Thus, the objective of this study was to evaluate different levels of water supply in the BRS 2 cotton growth, in the field of Campus Rio Verde - GO, in 2015. Experimental design used was randomized blocks, with three replications in a split-plot scheme of 5 x 4 with five water replacements (WR) (25, 50, 75,...

Author(s): Vitor Marques Vidal, Frederico Antonio Loureiro Soares, Marconi Batista Teixeira, Fernando Nobre Cunha, Leonardo Nazário Silva dos Santos, Cicero Teixeira Silva Costa, Giovani Santos Moraes, Washington Bezerra, Gustavo da Silva Vieira, Wilker Alves Morais, Aurélio Ferreira Melo, Ana Carolina Oliveira Horschutz, Jenifer Kelly Ferreira dos Santos, Igor Olacir Fernandes Silva and Leandro Spíndola Pereira

Perceptions and clustering of Greek farmers on the new CAP: Opportunity or threat?

March 2018

This study aims to highlight the problems of the Greek agriculture and to identify the level of information that the farmers have regarding the Common Agricultural Policy (CAP). Here, primary data were collected from in-depth interviews (structured questionnaire) with 241 farmers in the region of Thessaly-Greece. The study was conducted in November 2016, within the geographical boundaries of the Region of Thessaly. The...

Author(s): George Theodossiou, Christos Karelakis and Apostolos Goulas  

Nitrogen fertilization applied through drip fertigation and broadcasted in blueberry crop

March 2018

The aim of this experiment was to evaluate the effects of nitrogen fertilization on the blueberry crop throughout three consecutive years with different rates and ways of fertilizer application. The experiment was carried out in a commercial orchard located at the county of Vacaria-RS, in Southern Brazil utilizing the blueberry cultivar ‘Bluecrop’. The treatments consisted of the broadcasted nitrogen rates:...

Author(s): Leonardo Oliboni do Amaral, Elaine Damiani Conte, Lucas De Ross Marchioretto, Endrigo Soares Golin and Diego da Rocha Cavaletti  

Wet bulb dimensions associated with different flow and terrain declivity

March 2018

Geometry information of wet bulb is important for the design of projects and management of drip irrigation, mainly to estimate the volume of wet soil, emitter flows and irrigation time. This study aims to determine the dimensions of wet bulb formed by drippers with different flow and terrain declivities. For this, soil moisture levels were determined throughout the soil profile after drip irrigation with three flow...

Author(s): José Antonio R. Souza, Débora A. Moreira, Leandro C. Salomão, Fernando F. Cunha, Renan S. Pedroso, Ellen L. Silva, Janine M. Gonçalves, João G. F. Rezende, João V. C. Costa and Jamerson F. Silva Filho

Phosphorus adsorption and its relationship to the physical and chemical characteristics with different soil classes

March 2018

In order to determine the characteristics of phosphorus adsorption using the Langmuir and Freundlich isotherms and its relationship with some of the chemical and physical properties of soils, a study was developed at the Embrapa Soil Laboratory with soil samples (0 - 30 cm) from four classes of topsoil: Orthic Chromic Luvisols, Eutrophic Cambisols, Fluvic Neossol and Eutrophic Cambisols Typical. The hyperbolic model of...

Author(s): José Félix de Brito Neto, Leonardo Theodoro Bull, André Luiz Pereira da Silva, Cláudio Silva Soares and Joaquim Alves de Lima Junior  

Effect of poultry litter biochar on Ultisol physical properties

March 2018

A study was carried out to investigate the effect of biochar produced from the pyrolysis of poultry litter feedstock in some of the physical properties of a Yellow Red Argisol eutrophic typical (Ultisol), located in the municipality Lagoa Seca, State of Paraiba, Brazil, that is, granulometric analysis,  bulk density, porosity and available water capacity. Six doses of biochar (0; 10; 15; 20; 25 and 30 ton ha-1)...

Author(s): Lúcia Helena Garófalo Chaves, Washington Benevenuto de Lima, Iêde de Brito Chaves, Josué da Silva Buriti, Marcos Vinicius Lia Fook and José William de Lima Souza  

Characterization and classification of salt affected soils and irrigation water in Tendaho sugarcane production farm, North-Eastern Rift Valley of Ethiopia

March 2018

Considerable area of land is becoming unproductive every year because of salinity and sodicity in lowlands of Ethiopia. For sound land use and irrigation water management, it is a paramount important to know the chemical composition of soils and irrigation water. Therefore, the study was aimed to evaluate the physicochemical properties of soils and irrigation water of Tendaho sugarcane production farm, located in...

Author(s): Mulat Asmamaw, Ashenafi Haile, and Gezai Abera,  

Definition of smallholder Sheko cattle keepers’ breeding objectives through phenotypic ranking and choice experiments in Ethiopia

February 2018

This study aimed at identifying Sheko cattle keepers' preferences by way of phenotypic ranking and hypothetical choice experiment in their habitat in order to define the indigenous selection criteria. The ranking experiment report was based on 15 cows and 6 to 9 bulls. Three animals of the same sex were randomly assigned in one group that resulted into five groups for cows and two to three groups for bulls. Thirty...

Author(s): Elias Bayou, Aynalem Haile, Solomon Gizaw and Yoseph Mekasha  

Studying the volatility effect of agricultural exports on agriculture share of GDP: The case of Egypt

February 2018

This article aims to examine the long and short run relationship between agricultural exports and agriculture share of GDP. Links between series considered are assessed by co-integration analysis using Johansen co-integration technique and ECM-GARCH. Results indicate a positive link in the short and long term between agricultural exports and agriculture share of GDP, as well as co-integration between the pairs of series...

Author(s): Osama Ahmed, and Walid Sallam  

Using the p-median location model to set up aerodromes for coverage fertilization of eucalyptus plantations

February 2018

In this study an economic analysis was conducted to evaluate problem associated with a geographical information system (GIS) using facility location models for the p-median in order to optimize the location of aerodromes for the aerial fertilization (coverage fertilization) of eucalyptus plantations. The location model was tested on a 9,095.65 ha farm located in the Três Lagoas municipality in the Mato Grosso do...

Author(s): Leonardo Pereira Fardin, Helio Garcia Leite, Daniel Henrique Breda Binoti, Carlos Antonio Alvares Soares Ribeiro, Vicente Paulo Soares, Antonio Santana Ferraz, Márcio Bernardi and Aguida Beatriz Travaglia Viana  

Optimum plot size for experiments with papaya genotypes in field

February 2018

The objective of this study was to determine a suitable plot size for field experiments with papaya genotypes. Two experiments were carried out using a randomized complete block design with 11 and 12 papaya genotypes, respectively. In both experiments, plots consisted of one row, with 10 plants each. Spacing between rows was 3.5 m, with 1.5 m between plants. The characteristic evaluated was fruit production in t ha-1 in...

Author(s): Edilson Romais Schmildt, Adriel Lima Nascimento, Alan de Lima Nascimento, Karina Tiemi Hassuda dos Santos, Renan Garcia Malikouski, Omar Schmildt, Clemilton Alves da Silva, Geraldo Antônio Ferreguetti, Márcio Paulo Czepak and Julián Cuevas  

Assessment of the knowledge and use of pesticides by the tomato farmers in Mwea Region, Kenya

February 2018

Current cultivation of vegetables to meet food security standards requires the use of pesticides which reduce losses from pests and diseases. A cross-sectional survey for pesticides use in tomato farms was conducted in Mwea, Kenya to assess the practices and constraints faced by the farmers. Gender, level of education, the use of pesticides in farms, experience in tomato farming, list of common pesticides, periodicity...

Author(s): J. H. Nguetti , J. K. Imungi, M. W. Okoth, J. Wang’ombe, W. F. Mbacham and S. E. Mitema  

Performance of five potato varieties with regards to growth and production of mini-tubers under an aeroponic system in central highlands of Kenya

February 2018

There is limited information on the performance of Kenyan potato varieties under aeroponic systems. Experiments were therefore carried out at the Kenya Agricultural Research Institute (KARI), Tigoni, under an aeroponic system in 2012 and 2013 to evaluate the growth and mini-tubers production of five varieties commonly grown in Kenya and differ in vegetative and reproductive characteristics. The experiment was set up in...

Author(s): Miriam W. Mbiyu, Charles Lung’aho, Susan A. Otieno, Moses W. Nyongesa, Margaret N. Muchui, and Judith N. Ogemma  

Land use effects on soil erodibility and hydraulic conductivity in Akure, Nigeria

February 2018

This research was carried out to investigate the effects of three land use categories (grazed, cropped and forest land) on soil erodibility and hydraulic conductivity. Hydraulic conductivity was determined by a steady‐state flow using a mini‐disk infiltrometer while soil erodibility was determined following the Wischmeier and Smith equation. A suction rate of 2 cm s-1 was chosen for field infiltration measurement...

Author(s): Yusuf Habeeb Ajibola, Oguntunde Philip Gbenro, and Lawal Abosede Khadijah  

Growth and physiological responses of coffee (Coffea arabica L.) seedlings irrigated with diluted deep sea water

February 2018

Concentrations of 5, 10, 20, and 40% deep sea water (DSW) were tested, with irrigation water serving as the 0% control (tap water) on coffee (Coffea arabica L.) seedlings. The results showed that the growth parameters were affected significantly (α < 0.05) by the irrigation of 20 and 40% deep sea water. There were significant differences (α < 0.05) among treatments in stomata density/mm2, stomata...

Author(s): Mesfin Haile and Won Hee Kang

Sole and combined effect of three botanicals against cowpea seed bruchid, Callosobruchus maculatus Fabricius

February 2018

The bioactivity of three botanical powders in sole and combination against Callosobruchus maculatus (Fab.) was investigated at 29±3°C and relative humidity (R.H.) OF 65+5% in the laboratory. The appropriate mixing ratio of Cymbopogon citratus (C), Alstonia boonei (A) and Hyptis suaveolens  involved seven  combinations viz., C:A, C:H, A:H, C:A:H, H2:C:A, A:C2:H, H:C:A2 in simple ratios 1:1, 1:1, 1:1,...

Author(s): O. M. Azeez and O. O. R. Pitan  

Page 22 of 137, showing 50 records out of 6801 total, starting on record 1051, ending on 1100