African Journal of
Agricultural Research

  • Abbreviation: Afr. J. Agric. Res.
  • Language: English
  • ISSN: 1991-637X
  • DOI: 10.5897/AJAR
  • Start Year: 2006
  • Published Articles: 6841

AJAR Articles

Assessing the financial viability for small scale fish farmers in Namibia

August 2016

The aim of this study is to assess the financial viability of small-scale fish farmers in central northern Namibia, namely Oshikoto Region, Oshana Region, Omusati Region and Ohangwena region; who receive fingerlings on a continuously basis from the Ministry of Fishery and Marine Resources Ongwediva extension office. Out of the 76 active farmers, two-third (37) farmers were randomly selected and interviewed for this...

Author(s): Hilundwa, K.T. and Teweldemedhin, M.Y.

Effect of hydro and osmo priming on yield and yield components of Chickpea (Cicer arietinum L.)

August 2016

A field study was conducted at Debre Zeit Agricultural Research center station under rain fed condition with the objectives to determine the effect of seed priming for improving chickpea variety productivity and to determine the effectiveness of seed priming treatment and variety on stand establishment. The experimental factors were laid out in RCBD with three replications. The study indicated that all the phenological...

Author(s): Abebe Sori Negewo

Agronomic performance and industrial yield of sugarcane under water-saving irrigation in cerrado soil

August 2016

The objective of this study was to evaluate the growth and gross yield of sugar and ethanol of first-year sugarcane with water-saving irrigation via hose-drawn traveller using a line of sprinklers. The experimental design was randomized blocks, analyzed in a split plot scheme with four replications. The factors evaluated in the plots consisted of five levels water-saving irrigation applied after planting (0, 30, 45, 60...

Author(s): Fernando Nobre Cunha, Nelmício Furtado da Silva, Marconi Batista Teixeira, Wilker Alves Morais, Vitor Marques Vidal, Eduardo Sousa Cunha, Flávio Henrique Ferreira Gomes and Aymee Oliveira de Araujo

Evaluation of morphological aspects of common bean (Phaseolus vulgaris L.) genotypes for post-flowering drought resistance in Rift Valley of Ethiopia

August 2016

The development of bean varieties adapted to drought situations is a key strategy to minimize crop failure and improve food security. In this study, 25 genotypes of common beans (Phaseolus vulgaris L.) were grown under post flowering drought stress and non-stress conditions to evaluate their performance at Melkassa Agricultural Research Center during the off-season months (from December to May) in 2011/2012. The...

Author(s): Alemneh Mideksa

Profit loss per hectare according to profit efficiency level among smallholder rice farmers in Central Liberia

August 2016

Self-sufficiency in rice production has been an essential issue in the Liberian agriculture sector. With the increasing demand and low national productivity of rice (1.2 t/ha), Liberia remains a net importer of rice unless domestic production improves significantly. This study was conducted to analyze smallholder rice farmers’ level of efficiency and profit-loss due to allocative and technical inefficiencies. A...

Author(s): Joseph Lavela Saysay, Damian Mulokozi Gabagambi and Gilead Isaac Mlay

Nematicidal effect of Crambe abyssinica leaf extracts to Meloidogyne javanica on tomato

August 2016

Root-knot nematodes (Meloidogyne javanica) interferes with the production of tomato. The indiscriminate use of chemical nematicides brings negative consequences to society. The aim of this study was to investigate the effect of crambe extract on the control of M. javanica, with different modes and application times, in tomato. Studies were conducted during the 2014 cropping season at the climatized greenhouse located at...

Author(s): Sidiane Coltro-Roncato, José Renato Stangarlin, Odair José Kuhn, Edilaine Della Valentina Gonçalves, Omari Dangelo Forlin Dildey, Bruna Broti Rissato, Laline Broetto, Nicanor Pilarski Henkemeier, Thaisa Muriel Mioranza, Anderson Luis Heling, Luciana Iurkiv, Vanessa de Oliveira Faria, Vanessa Vaz Stefanello and Tulya Fernanda Barrientos Webler

Effect of saline water, bovine biofertilizer and potassium on yellow passion fruit growth after planting and on soil salinity

August 2016

The monitoring of plants growth constitutes an important activity during the crops formation, including the yellow passion fruit. In this direction, an experiment was carried out in Remigio, Paraiba State, Brazil, to evaluate the effects of saline water irrigation, bovine biofertilizer and potassium on yellow passion fruit growth plants and soil salinity. Treatments were arranged in randomized block with three...

Author(s): José Thyago Aires Souza, Lourival Ferreira Cavalcante, Járisson Cavalcante Nunes, Francisco Thiago Coelho Bezerra, Juliete Araújo da Silva Nunes; Aldeir Ronaldo Silva; Denizard Oresca; Adailza Guilherme Cavalcante

Sugarcane cultivation submitted to water replacement via irrigation bar

August 2016

From the hypothesis that during the development of sugarcane, the water regime affects the morphological performance and this affects the productivity. The objective of this work was to evaluate the growth, development, productivity and yield of sugarcane during the cycle the planting sugarcane (variety SP83-5073), under different water replacements. The experiment was established in the Boa Vista mill located in...

Author(s): Nelmício Furtado da Silva, Fernando Nobre Cunha, Marconi Batista Teixeira, Frederico Antonio Loureiro Soares, Cláudio Carvalho dos Santos, Fernando Rodrigues Cabral Filho, Edson Cabral da Silva and Wilker Alves Morais

Characteristic of an Oxisol post-cultivation of the corn using tannery sludge vermicompost and irrigation with domestic wastewater

August 2016

The use of organic solid waste/effluent has currently been increasingly enhanced. A waste and effluent currently produced on a large scale that have potential for use in agriculture refers to sludge tannery and wastewater, respectively. However, in Brazil these residues are still little used and there is great reluctance to use them in general agriculture. Thus, this study aimed to evaluate the characteristics of an...

Author(s): Aline Sueli de Lima Rodrigues, Fernando Godinho de Araújo, Ivandilson Pessoa Pinto de Menezes, Débora Astori Moreira, José Antonio Rodrigues de Souza, Caio César Oliveira Pereira, Leandro Caixeta Salomão, Anderson Rodrigo da Silva and Guilherme Malafaia

Effect of combined doses of gamma ray and sodium azide (mutagenic agents) on the morphological traits of some varieties of okra (Abelmoschus esculentus)

August 2016

Abelmoschus esculentus (okra) is a popular health food because of its high fiber, vitamin C and folate content. It is also rich in antioxidants, a good source of calcium and potassium. Three varieties of okra: Jokoso, NHAe47-4 and Beru (a local variety) were irradiated with 20, 40, 60, 80 and 100 kr doses of gamma rays then soaked in 2.0 mM and 3.0 Mm of Sodium azide for 2h with the aim of determining the effects of the...

Author(s): Ati Hassana Maryam and Adamu Abu Kasimu

Feed resource utilization and dairy cattle productivity in the agro-pastoral system of South Western Uganda

August 2016

A cross-sectional study was carried out in six sub-counties of Kiruhura district, South Western Uganda with the aim of assessing feed resource utilisation and dairy cattle productivity. Individual interviews using a semi structured questionnaire were conducted in seventy five households.  The mean land holding, grazing land and cultivated land were 74, 70 and 2 ha, respectively. Majority (61%) of the farms kept...

Author(s): Mary Tibezinda, Ewa Wredle, Elly N. Sabiiti and Denis Mpairwe

Soybean agronomic performance in narrow and wide row spacing associated with NPK fertilizer under no-tillage

August 2016

The purpose of this research was to evaluate soybean agronomic traits performance under row spacing associated with NPK fertilizer. The experimental design was set up in a randomized complete block and the treatments were arranged with factorial concept, consisting of four NPK (02-20-18%) fertilizer rates (0; 200; 400 and 600 kg ha-1) and five row spacing (0.35; 0.45; 0.50; 0.60 and 0.70 m), with three replications. The...

Author(s): Cedrick Brito Chaim Jardim Rosa, Marlene Estevão Marchetti, Ademar Pereira Serra, Luiz Carlos Ferreira de Souza, Simone Cândido Ensinas, Eulene Francisco da Silva, Elaine Reis Pinheiro Lourente, Elisângela Dupas, Eloise Mello Viana de Moraes, Flávia Araújo Mattos, Matheus Andrade Martinez, Vanessa do Amaral Conrad, Tárik Cazeiro El Kadri and  Maílson Vieira Jesus

Vegetation structure of naturally occurring areas of mangaba Hancornia speciosa Gomes in the mid-north region of Brazil

August 2016

The unknown potential of the mangaba Hancornia speciosa naturally occurring areas in the mid-north region of Brazil has raised the risk of its extinction and contributed to its underutilization. The objective of this study was to characterize the vegetation structure with naturally occurring mangaba in Recanto, Patizal and Recurso, villages in Morros municipality, State of Maranhão to provide the species proper...

Author(s): Larissa de Paula Viana da Silva, Ariadne Enes Rocha, José Ribamar Gusmão Araujo, Régila Martins dos Reis, Francisca Helena Muniz and Mario Luiz Ribeiro Mesquita

Study of the genetic variability, correlation and importance of phenotypic characteristics in cactus pear (Opuntia and Nopalea)

August 2016

The cactus pear is a widely cultivated plant in the Northeast of Brazil, contributing significantly to the feeding of livestock, especially in times of drought. Because of the high variation between phenotypic varieties grown in this region, it is essential to study the genetic diversity. The objectives of this study were to characterize the genetic diversity in seven varieties of cactus pear, genera Opuntia and...

Author(s): Francisco Abel Lemos Alves, Albericio Pereira de Andrade, Riselane de Lucena Alcântara Bruno, Djalma Cordeiro dos Santos and Vanda Lucia Arcanjo Pereira

Efficiency of commercial products for the control of Sclerotinia sclerotiorum (Lib.) de Bary in soybean cultivar NS 5909 RG

August 2016

The constant assessment of methods of disease control is essential in achieving production regularity and for ongoing increments in soybean productivity. Among the various diseases, the intensity of the white mold has been increasing, caused especially by the fungus Sclerotinia sclerotiorum (Lib.) de Bary. The present work has the objective to assess different seed treatments in association with fungicide application to...

Author(s): Alfredo José Alves Neto, Álvaro Guilherme Alves, José Renato Stangarlin, Jéssica Caroline Coppo, Leandro Rampim Bruna Broti Rissato Diego Augusto Fois Fatecha, Eloisa Lorenzetti, Paulo Sérgio Giacomelli and Cristiane Belmonte.

Growth and production of common bean in direct seeding under irrigated deficit condition

August 2016

Plant growth is one of the most sensitive physiological processes to water deficiency. The objective of this study was to evaluate different levels of water replacement combined in two periods of the bean cycle, cv. IAC Alvorada, with respect to the biometric parameters. The study was carried out for two years (2010 and 2011) in a Red Latosol, distroferric, of clay texture, in Botucatu, SP. The experimental design was a...

Author(s): José Joaquim Carvalho, João Carlos Cury Saad, Marconi Batista Teixeira, José Alves Júnior, Melissa Selaysim Di Campos, Ana Carolina Oliveira Horschutz and Fernando Nobre Cunha

Challenges facing agricultural cooperative system: Analysing participation using a discrete choice model for the southern communal area of Namibia

August 2016

The problem of trust, non-transparency, and dysfunctionality has been ascribed to the character and the nature of the agricultural cooperative system in Namibia. Perhaps the true characterisation of the problem is not known with certainty albeit, the concern about the role of the institution, government intervention and member laxity. Further insight from the institutional economics suggests that organisational...

Author(s): Uchezuba, D. I., Mbai, S. and Laubscher, K.

Nitrate leaching in irrigated inorganic agriculture: A case study of Mashare commercial farm in Namibia, Okavango River Basin

August 2016

Irrigation schemes in old flood plains of the Okavango River were identified as major non-point sources of sediment nutrients and leachates despite lack of supporting evidence from studies that measured nutrient levels in the river’s mainstream using grab samples. Hence this study sought to check for evidence of loss and transport of nitrates from an irrigated field into the uncultivated riparian zones of the...

Author(s): Andrea Vushe, Loffie von Landsberg, Alexander Groengroeft and Damas A. Mashauri

Effect of seed component ratios and cutting regime on the performances of annual ryegrass and burr medic mixtures

August 2016

A research was carried out in Sardinia (Italy) to identify the best combination and management in binary mixtures of Lolium rigidum Gaudin Nurra (L) and Medicago polymorpha L. Anglona (P) new released varieties of both species. Two pure stands (L100P0 and L0P100) and three mixtures (L75P25, L50P50 and L25P75) were compared under two cutting regimes; a commercial mixture was also included in the experiment as test....

Author(s): Giovanni Antonio Re, Claudio Porqueddu, Federico Sanna, Leonardo Sulas, Antonio Franca, Giovanna Piluzza and Simonetta Bullitta

Drying of hulled naturally processed coffee with high moisture content and its impacts on quality

August 2016

This study aimed to propose a new method to reduce the time needed for coffee processing and drying and to verify this method’s possible impact on both the sensorial and physiological qualities of coffee. The method, which entails hulling coffee with different moisture contents by removing the entire pericarp before completing the drying, reduced the operating time by more than 50% as compared to the normal drying...

Author(s): Valdiney Cambuy Siqueira, Flavio Meira Borem, Eder Pedroza Isquierdo, Guilherme Euripedes Alves, Diego Egidio Ribeiro, Afonso Celso Ferreira Pinto, and Jose Henrique da Silva Taveira

Special liming materials for acidity control of soils with variable charge

August 2016

Soil acidity has been the major limiting factor to farming activities in the tropics and subtropics. The objective of this study was to verify the efficacy of special liming materials, when compared with the dolomitic limestone, regarding the correction of soil acidity with variable charge in controlled conditions. Samples of a Typic Dystrudept and Rhodic Hapludox were collected from a of layer 0-20 cm, and used to...

Author(s): Jessica Alves dos Santos, Adriel Ferreira da Fonseca, Domenico Zocco and Igor Vieira

Morphological analysis of fruits, seeds, and seedling germination Acacia farnesiana (L.) Willd

August 2016

The understanding of the morphology of fruits, seeds and seedlings is very important on the identification and the preservation of species. The work describes and illustrates morphological characteristics of fruits, seeds, germination, and seedlings of Acasia farnesiana. The fruits were collected manually from parent trees selected at random, in the municipality of Sousa State of Paraíba. After collection, they...

Author(s): Paulo Alexandre Fernandes Rodrigues de Melo, Kelina Bernardo Silva, Edna Ursulino Alves, Robson Luis Silva de Medeiros, Antônio Pereira dos Anjos Neto, Kedma Maria Silva Pinto, Wallace de Sousa Leite and Valderez Pontes Matos

Study of the variability, correlation and importance of chemical and nutritional characteristics in cactus pear (Opuntia and Nopalea)

August 2016

Cactus pear is a widely cultivated plant in the Brazilian semiarid region that contributes significantly to the feeding of livestock, especially in times of drought. Because it has a great phenotypic variability among the varieties cultivated in Brazil, there is need to characterize the diversity of chemical and nutritional characteristics. The objectives of this study were to characterize the diversity in seven...

Author(s): Francisco Abel Lemos Alves, Albericio Pereira de Andrade, Riselane de Lucena Alcântara Bruno and Djalma Cordeiro dos Santos

Photosynthesis and water relations of sunflower cultivars under salinity conditions

July 2016

The study of photosynthetic responses in plants provides useful information for understanding the physiological processes involved in the salinity tolerance and susceptibility mechanisms of sunflower cultivars. The aim of the present study was to evaluate the gas exchange responses, water relations (stress hydric), and growth characteristics of two sunflower cultivars, Agrobel 963 and Aguará 4, subjected to...

Author(s): Fátima Marques de A. Maia, Alan Carlos Costa, Jônatas Neves de Castro, Clarice Aparecida Megguer and Frederico Antônio Loureiro Soares

Physiological quality of sesame seed harvested at different plant positions and maturity stages

July 2016

Being peculiar for its unique chemical and nutritional characteristics, sesame (Sesamum indicum L.) is a good option for farmers. It is used as human food, animal feed and has great potential for the production of bio diesel. Despite these potentials, studies on ideal maturity stage for harvesting and physiological quality of sesame seeds in different parts of the plant are rare and also there is insufficient...

Author(s): Cristiane Fernandes Lisboa, Deyner Damas Aguiar Silva, Itamar Rosa Teixeira, André José de Campos, Ivano Alessandro Devilla, Alessandro Guerra da Silva

Abscisic acid-mediated stomatal closure and antioxidant defenses in Jatropha curcas L. seedlings submitted to moderate water deficit

July 2016

The objective of this research was to evaluate the biochemical changes in leaves from different genotypes of J. curcas in order to extend knowledge regarding the mechanisms of tolerance to water deficit and its variation in different genotypes. Potted plants of three genotypes (CNPAE 126, 137 and 139) were cultivated under water deficit conditions for 66 days. Two watering regimes, as measured by the percentage of field...

Author(s): Leandro Dias da Silva, Tessio Araujo de Santana, Priscila Souza de Oliveira, Bruno Galvêas Laviola, Márcio Gilberto Cardoso da Costa, Alex-Alan Furtado de Almeida and Fábio Pinto Gomes

Saline water and organic matter in the development and quality of Licania rigida Benth. seedlings

July 2016

Licania rigida Benth. (oiticica) is a native species from the Northeastern Brazil. In this sense, the aim of this study is to evaluate the effects of irrigation with saline water and organic matter on the growth and quality of oiticica seedlings. The experiments were laid out in randomized complete block using a 5 × 2 factorial design related to electrical conductivity of irrigation water at 0.5, 1.5, 3.0, 4.5 and...

Author(s): Alian Cássio Pereira Cavalcante, Manoel Alexandre Diniz Neto, Lourival Ferreira Cavalcante, Adailza Guilherme Cavalcante, Belísia Lúcia Moreira Toscano Diniz, Raunira da Costa Araújo, Evandro Franklin de Mesquita and José Flávio Cardoso Zuza

Growth analysis of sugarcane inoculated with diazotrophic bacteria and nitrogen fertilization

July 2016

The use of inoculants containing growth-promoting diazotrophic bacteria can stimulate mass and nutrient accumulation in sugarcane. The purpose of this study was to evaluate plant growth and accumulation of macroelements in sugarcane, variety RB92579, under bacterial inoculation with or without N fertilization. The field experiment was carried out in a Red-Yellow Podzolic soil in Seropédica, RJ, in a randomized...

Author(s): Renan O. Pedula, Nivaldo Schultz, Rafael C. Monteiro, Willian Pereira, Adelson P. de Araújo, Segundo Urquiaga and Veronica M. Reis

Potential for recovery of Campomanesia xanthocarpa Mart. ex O. berg seedlings from water deficit

July 2016

The objective of this study is to evaluate the effect of water deficit and the recovery potential following rehydration, on the metabolism of Campomanesia xanthocarpa seedlings. The seedlings were distributed in two groups: the first group was the control, in which, plants were hydrated periodically in order to maintain 70% water holding capacity and the second was the treatment group characterized by stress, in which...

Author(s): Larissa Fatarelli Bento, Silvana de Paula Quintão Scalon, Daiane Mugnol Dresch and Zefa Valdivina Pereira

Characterization of goat production systems and trait preferences of goat keepers in Bench Maji zone, south western Ethiopia

July 2016

Studies to characterize goat production system and identify breeding practices and trait preferences of goat keepers were conducted in three districts (Sheko, Shey Bench and Meanit Shasha) of Bench Maji zone, southwestern Ethiopia. Semi-structured questionnaires and own-flock ranking experiments were employed for data collection. The results of the analyses revealed that the average goat flock size was 9.8±9.3....

Author(s): Tegegn Fantahun, Kefyalew Alemayehu and Solomon Abegaz

Physiological potential of tamarind seeds subjected to stress conditions and storage

July 2016

Tamarind (Tamarindus indica L.) is a fruit species native to Equatorial Africa, India and Southeast Asia. Its seeds experience slow germination, thus, study on the influence of environmental factors, such as water and salt stresses, on seed germination, is required to assess the tolerance of these seeds to storage, and to maintain the vigor and the viability in the period between harvesting and sowing. The objective of...

Author(s): Ana V. C. da Silva, Adrielle N. R. Soares, Priscilla S. Santos, Ana L. S. Nascimento, Marina F. da Vitória, Jéssica M. S. P. Oliveira, Marília F. de V. Melo, Ana da S. Ledo and Allivia R. C. Rabbani

Exchangeable cations and available phosphorus in soils with variable charge after application of special liming materials

July 2016

Special liming materials have the potential to control soil acidity and constitute a source of nutrients for plant development. In this study, the efficiency of special liming materials was evaluated. Their effects in soil exchangeable cations and available P concentrations were compared with the ones of dolomitic limestone (DL). Samples of Typic Distrudept and Rhodic Hapludox were collected from 0 to 20 cm layer. Two...

Author(s): Jessica Alves dos Santos, Adriel Ferreira da Fonseca, Domenico Zocco and Igor Vieira

Statistical process control in self compensating emitters using water at different saline concentrations

July 2016

The statistical process control applied in the irrigation systems allows the visualization of process to reduce wastage of inputs, such as water and energy quality, which contributes to assessing its proper functioning, and feasibility of implementation and operation. That is why it is necessary to evaluate the self-compensating emitters using saline water at different concentrations. This experiment was applied in the...

Author(s): Patrícia Ferreira da Silva, José Dantas Neto, Rigoberto Moreira de Matos, Sabrina Cordeiro de Lima and Delfran Batista dos Santos

Yield and quality of dual-purpose barley and triticale in a semi-arid environment in Tunisia

July 2016

The semi-arid region of Tunisia is characterized by a low and erratic rainfall. This makes year-round maintenance of pasture and forage production under non-irrigated conditions both costly and difficult. In order to fill the winter feed gap in the livestock cycle; some cereals can be used as dual-purpose. This study aimed at evaluating agronomic performances and grain quality of two dual-purposes cereal crops, Barley...

Author(s): Sadreddine BEJI

Physical and physicochemical attributes of noni fruits fertilized with cattle manure and potassium

July 2016

Noni has been introduced in Brazil just over a decade ago. Therefore, the information regarding crop fertilization and its influence on fruit quality is rare in the literature. Among macronutrients, potassium is highly concentrated in noni plants, and fertilization with cattle manure contributes to plant nutrition and fruit quality. This study sought to evaluate the effect of potassium fertilizer and cattle manure on...

Author(s): Antônio Gustavo de Luna Souto, Lourival Ferreira Cavalcante, Vânia da Silva Fraga, Belísia Lúcia Moreira Toscano Diniz, Maria Rosimeire Miguel da Silva, Roberto Monteiro Ferreira Filho, Evandro Franklin Mesquita, Stênio Andrey Guedes Dantas and Francisco Vanies da Silva Sá

Improvement of maize yield and soil fertility by 2-years compost application in Malawi’s northern districts

July 2016

Fertilizer use in Malawi is limited due to the relatively high fertilizer price, improvement of fertilizer efficiency is therefore necessary to enhance both maize yield and soil fertility. 2-years compost application was conducted to evaluate its effectiveness in improving soil fertility and enhancing maize yields. Compost application was shown to be effective even at the early stage of application in improving soil...

Author(s): Naohiro Matsui, Koji Nakata, Chisambi Cornelius and Moyo Macdonald

Phosphorus and silicon fertilizer rates effects on dynamics of soil phosphorus fractions in oxisol under common bean cultivation

July 2016

The purpose of this research was to evaluate the effects of P and Si fertilizer rates in dynamic of P fractions in clay soil under greenhouse. The research was carried out in a Dystroferric Red Latosol of a very loamy texture from Lavras city, Minas Gerais State, Brazil. The experimental design was entirely randomized, arranged in 4 × 3 factorial design, with four repetitions. The treatments included four...

Author(s): Alessandra Mayumi Tokura Alovisi, Antonio Eduardo Furtini Neto, Ademar Pereira Serra, Alves Alexandre Alovisi, Luciene Kazue Tokura, Elaine Reis Pinheiro Lourente, Robervaldo Soares da Silva, Camila Farah Borges da Silva and Jucinei Souza Fernandes

Soil porosity and density in sugarcane cultivation under different tillage systems

July 2016

Monitoring the physical quality of soils under intensive sugarcane production requires sustainable forms of use and soil management. Thus, the objective of this research was to evaluate the influence of soil tillage systems on soil porosity and density in ratoon-cane cultivation, in addition to possible changes which may occur during the season. The experiment was carried out in the state of Goiás, Brazil. The...

Author(s): Everton Martins Arruda, Risely Ferraz de Almeida, Luis Augusto da Silva Domingues, Antonio Carlos da Silva Junior, Emmerson Rodrigues de Moraes, Leonardo Rodrigues Barros, Jéssika Lorrine de Oliveira Sousa and Regina Maria Quintão Lana

Gelatin extraction from Kumakuma (Brachyplathystoma filamentosum) skin using the liming method

July 2016

Gelatin extraction process from Kumakuma (Brachyplathystoma filamentosum) skin was optimized using a calcium hydroxide solution. The gelatin obtained was characterized through scanning electron microscopy and analyses of yield, gel strength, color, viscosity, amino acid profile, melting point, foaming capacity, and emulsifying capacity. The optimized conditions were defined over ten days of pre-treatment at 50°C....

Author(s): Elen Vanessa Costa da Silva, Rosinelson da Silva Pena and Lúcia de Fátima Henriques Lourenço

Diversity of soil macrofauna under sugarcane monoculture and two different natural vegetation types

July 2016

Soil macrofauna organisms are recognized as ecological indicators of soil management practices. Sugarcane monoculture can have negative impacts on soil, including biodiversity loss, which should be evaluated. In that sense, the aim of this was to determine the diversity macrofauna under sugarcane (Saccharum spp.) annual growth cycle (2012-2013) comparing two different natural vegetation areas (Sandbank and Atlantic...

Author(s): Glécio Machado Siqueira, Ênio Farias de França Silva, Mariana Matos Moreira, Gustavo André de Araújo Santos and Raimunda Alves Silva

Companion plants associated with kale increase the abundance and species richness of the natural-enemies of Lipaphis erysimi (Kaltenbach) (Hemiptera: Aphididae)

July 2016

The effects of intercropping of Brassicaceae with coriander (Coriandrum sativum), dill (Anethum graveolens), African marigold (Tagetes erecta) and calendula (Calendula officinalis) on the abundance, species richness and diversity of predators and parasitoids of Lipaphis erysimi have been assessed. The numbers of aphids, parasitized aphids and natural enemies were determined during two consecutive phases. The first...

Author(s): Valkíria Fabiana da Silva, Luís Cláudio Paterno Silveira, Alexandre dos Santos, Adriano Jorge Nunes dos Santos and Vitor Barrile Tomazella

Growth, yield and content of trace elements in coffee fruits grown in soils under successive application of sewage sludge

July 2016

Brazil seeks to optimize the use of fertilizers by taking advantage of agricultural residues. The sewage sludge is used as organic matter in various crops such as coffee. However, an experiment in lysimeter was performed seeking to assess the growth, yield and content of zinc, copper, nickel, cadmium, lead and chromium in coffee fruits grown on Dystrophic Red Yellow Latosol (dRYL), Dystropherric Red Latosol (dRL) and...

Author(s): Alisson Lucrecio da Costa, Gabriela Lúcia Pinheiro, Flávia Villela Soares, Carlos Alberto Silva and José Maria de Lima

Hydro-physical properties and organic carbon of a yellow oxysol under different uses

July 2016

Intensive soil use without a management plan based on its structures and limitations is the main cause of soil erosion and degradation. The physical properties changes of a studied agricultural area are evaluated by comparing with an area that did not suffer any modification caused by human activities, which is considered the ideal soil condition. This research evaluated the alterations in the hydro-physical properties...

Author(s): Welldy Gonçalves Teixeira, Isabel Dayane de Sousa Queiroz, Risely Ferraz Almeida, Fernanda Pereira Martins, Joseph Elias Rodrigues Mikhael and Elias Nascentes Borges

Association of weather variables with yield and yield components of cotton (Gossypium hirsutun L.) at reproductive phenophase

July 2016

Growth and development of cotton is influenced by several environmental factors such as fertility and biology of soil, change in temperature, amount and distribution of rainfall and carbon dioxide concentration which are attributes of climate change. A field experiment was conducted to study the contribution of weather variables for the total variation in yield and yield components during reproductive phenophase of...

Author(s): Zenebe Mekonnen Adare, A. Srinivas, V. Praveen Rao, T. Ram Prakash and T. Ramesh Thatikunta

Genetic divergence of colored cotton based on inter-simple sequence repeat (ISSR) markers

July 2016

The management of colored cotton is an agricultural activity widely adopted by farmers located at Brazilian semiarid region. The fiber colors currently available are still limited to green and shades of brown, however, there is possibility to broaden the variability for this trait by using accessions from Gossypium Brazilian bank in breeding programs. Therefore, it is necessary to know the genetic diversity of available...

Author(s): Geisenilma Maria Gonçalves da Rocha, José Jaime Vasconcelos Cavalcanti, Luiz Paulo de Carvalho, Roseane Cavalcanti dos Santos and Liziane Maria de Lima

Nutrient intake, nitrogen balance and growth performance in buffalo calves fed citrus pulp as a concentrate source

July 2016

The study was planned to investigate the effects of dried citrus pulp on nutrient intake, digestibility, nitrogen balance, blood metabolites, growth performance and economics in Nilli Ravi buffalo calves. Twenty buffalo male calves of 18 to 24 months of age having 200 to 250 kg body weight were used in a randomized complete block design. Four iso-caloric and iso-nitrogenous diets containing 5, 10, 15 and 20% dried...

Author(s): Muhammad Zeeshan Javed, Muhammad Sharif, Shoukat Ali Bhatti, Muhammad Qamar Bilal, Fayyaz Ahmed, Fawwad Ahmad, Muhammad Saif-ur-Rehman and Muhammad Tariq

Motivational factors involved in development of dairy-based innovations

July 2016

Agricultural innovations are crucial for attainment of food security and poverty reduction; this fact is universally accepted. Farmers are not only recipients of introduced scientific technologies. It is a well known fact that agricultural innovations can emerge from multiple sources including farmers; in fact, farmers have been innovating long before the emergence of formal research and development. These innovations...

Author(s): Ram Datt, Sujeet K. Jha and Ata-Ul-Munim Tak

Spatial variability of weeds in an Oxisol under no-tillage system

July 2016

In the global agribusiness, the herbicide use is a major problem for sustainable production, in this sense, it is necessary to better understand the interaction of weed species and floristic composition such as biodiversity indicators. The objective of this study was to analyze the spatial variability of weeds in an Oxisol under no-tillage system. Samples were taken in an area of 0.5 ha, in 50 sampling points with...

Author(s): Glécio Machado Siqueira, Raimunda Alves Silva, Alana das Chagas Ferreira Aguiar, Mayanna Karlla Lima Costa, Ênio Farias França e Silva

Effects of hormone balance on Korean Hackberry seed germination

July 2016

Korean Hackberry (Celtis koraiensis Nakai), an ornamental, deciduous tree, lacks species resources, and low germination percentage also prevent the exploitation. Thus it becomes necessary to investage the mechanism of seed dormancy. This research explored the effect of plant hormone and seed coat (endocarp and testa) on seed germination. Endogenous hormone concentration, protein content, total soluble sugars, total...

Author(s): Yu Yang Liu and De Kui Zang

Chemical properties of soils in agroforestry homegardens and other land use systems in Eastern Amazon, Brazil

July 2016

Homegardens are considered as an alternative to preserve and/or restore the fertility and productivity of degraded soils. The assessment of changes in soil chemical properties resulting from land use and management is important to understand these changes and allow a rational intervention to ensure production on a sustainable basis. Thus, the aim of this study was to evaluate the soil chemical properties of homegardens...

Author(s): Thiago Almeida Vieira, Leonilde dos Santos Rosa, Maria Marly de Lourdes Silva Santos, Clodoaldo Alcino Andrade dos Santos, Denise Castro Lustosa and Alan Péricles Amaral dos Santos

Page 38 of 137, showing 50 records out of 6841 total, starting on record 1851, ending on 1900