African Journal of
Agricultural Research

  • Abbreviation: Afr. J. Agric. Res.
  • Language: English
  • ISSN: 1991-637X
  • DOI: 10.5897/AJAR
  • Start Year: 2006
  • Published Articles: 6709

AJAR Articles

Agronomical and morphological diversity of the accessions of cassava in Central African Republic

February 2017

Cassava (Manihot esculenta Crantz) is an important subsistence food crop in Central African Republic. Data collections for the agronomical and morphological characterization provided 59 accessions of Cassava and were subjected to multivariate analysis to discriminate groups of accessions according to their morphological features. The Eigenvalues of the principal axes extracted from the multivariate analysis indicated...

Author(s): Kosh-Komba, E., Aba-Toumnou L., Semballa, S., Zinga, I., Yandia, P.,  Atato, A., Kadekoy-Tigague, D. , Wabolou, F. , Kongbo Dembo, E., Batawila, K. and Akpagana, K.

Physical and physiological attributes of black oat seeds produced in southern Brazil

February 2017

Black oat crop occupies the largest area during winter. It is important for animal production, crop rotation and dry matter production of approximately 3.8 million hectares in Rio Grande do Sul State. To ensure sowing, seeds are produced which must have high quality standards and must be evaluated by seed testing laboratories. Given this, the present study evaluated the physical and physiological quality of oat seeds...

Author(s): Roberto Carbonera, Ubirajara Russi Nunes, Alessandro Dal’Col Lúcio, José Antônio Gonzalez da Silva and Lorenzo Ghisleni Arenhardt

Cryopreservation and effect of lighting conditions and cytokinins on in vitro multiplication of Miconia ligustroides (DC.) Naudin

February 2017

Miconia ligustroides is a species that is native to Brazil and has medicinal and ecological importance. However, the species shows a lack of uniformity and delay in ex vitro germination. Thus, this study aimed to establish in vitro propagation for the species and to develop a protocol for the cryopreservation of seeds. For in vitro germination, activated charcoal (0.0, 0.5, 1.0, and 2.0 g L-1) was tested in Murashige...

Author(s): Débora de Oliveira Prudente, Débora Domiciano, Renato Paiva, Fernanda Carlota Nery and Wesley Pires Flausino Máximo

Long-term application of swine manure on soybean grown in no-till system in Savannah soils

February 2017

The application of liquid swine manure (LSM) in the soil as biofertilizer is one of the most recycling alternatives adopted, because the nutrients contained in this residue can override, in part or totally, commercial fertilizers, crop productivity with a reduction in production costs. The goal with this work was to evaluate the use of LSM as a substitute of mineral fertilization on soybean culture in conditions of...

Author(s): June Faria Scherrer Menezes, Mariana Pina da Silva, Veridiana Cardozo Gonçalves Cantão, Jeander Oliveira Caetano, Vinícius de Melo Benites, Gabriela Wilk Baião Campos and Bruno Lobato Rodrigues dos Santos

Impact of climate change on cotton production in Burkina Faso

February 2017

This paper evaluated the impact of climate change on cotton production in Burkina Faso. An econometric analysis resulted in identifying the major factors influencing cotton yields and evaluating the likely effects of future climate change. The results of our study regarding the potential impact of future climate change on cotton yield indicated that further increases in global temperature would significantly reduce the...

Author(s): Abdoulaye Diarra, Bruno Barbier, Bétéo Zongo and Hamma Yacouba

Automation in the control of a water mixer used for sanitation of bovine milking unit

February 2017

The milking unit sanitization is necessary after use. The processes are usually divided in steps and each one needs water at different temperatures for proper cleaning. However, to get the right temperature for each step cannot be easily achieved manually in rural properties. A hot water and cold water flow are needed. The farmer will need to properly mix the two water flows in order to reach a desired...

Author(s): Carlos Eduardo Camargo Nogueira, Gilberto Carlos Arnauts, Enerdan Fernando Dal Ponte, Rosemar Cristiane Dal Ponte, Jair Antonio Cruz Siqueira, Samuel Nelson Melegari de Souza and Eder Soares Machado

Response of phosphorous fertilizer and its recommendation for food barley (Hordium vulgare L.) production on Nitisols of central Ethiopian highlands

February 2017

Nowadays, making available proper and balanced fertilizer recommendations is of paramount importance in order to confirm security and increase crop productivity in sustainable way for farmers and other stakeholders. Soil test based phosphorous calibration study was conducted for barley (Hordium vulgare L.) on Nitosols of farmers’ fields in West Shewa, in the central highlands of Ethiopia. The experiment was...

Author(s): Legesse Admassu

Leaf area of sugarcane varieties and their correlation with biomass productivity in three cycles

February 2017

The objective of this work is to study the leaf area and biomass production of 4 sugarcane varieties in cane plant cycles, first and second regrowth. The experiment was conducted at Fazenda Jequiá in the state of Alagoas, Brazil. A randomized block design with 5 replications was used. The treatments were 4 cultivars: RB92579, SP813250, RB867515 and VAT90212. The length and width of the sheet + 3 were determined...

Author(s): Vinicius Santos Gomes da Silva, Mauro Wagner de Oliveira, Terezinha Bezerra Albino Oliveira,  Bruno Campos Mantovanelli, Abraão Cícero da Silva, Adrielle Naiana Ribeiro Soares and Paulo Ricardo Aprígio Clemente

Mathematical analysis of morphological traits and their effects on body weight in the red crab (Charybdis feriata)

February 2017

The red crab (Charybdis feriata) is one of most important fishery resource in China. In the present study, 17 morphological traits and body weight of C. feriata were first measured and 18 traits were characterized, and then, the effects of morphological traits on body weight were estimated by statistical methods including correlation coefficients, determination coefficients, path coefficients and regression equations....

Author(s): Xiong Zou, Hongyu Ma, Jianxue Lu, Yangyang Gong and Lianjun Xia

Wheat blast research: Status and imperatives

February 2017

Wheat blast is relatively a new disease of wheat that first appeared in Brazil in 1985. It did spread to some other neighbouring countries in the following years and owing to its predisposing factors, was feared to be capable of moving across continental boundaries. The disease has now been reported from Bangladesh. Wheat blast at best can be described as poorly understood as both pathogen and its pathogenicity as well...

Author(s): Rajiv Sharma

Evaluation of nonlinear econometric models to estimate the wood volume of amazon forests

February 2017

Effective timber extraction from primary managed forests requires accurate estimates of the annual volumes of wood. Unlike other studies, this paper uses dummy variables to capture the effects of atypical observations and to estimate the volumetric equations using nonlinear least squares. The results show that the artificial variables are important for the model’s specification, and that the use of nonlinear least...

Author(s): Antônio Cordeiro de Santana, Ádamo Lima de Santana, Mário Miguel Amin and Nilson Luiz Costa

Tomato Leafminer, Tuta absoluta (Meyrick 1917), an emerging agricultural pest in Sub-Saharan Africa: Current and prospective management strategies

February 2017

Tomato (Solanum lycopersicum L.) is an important vegetable crop for income and nutrition of small-holder farmers in sub-Saharan Africa. However, it is attacked by many insect pests that cause high economic losses. This review focuses on one insect pest, namely Tuta absoluta (Meyrick, 1917) (Lepidoptera: Gelechiidae). Many studies have shown that chemical pesticides have failed to control tomato leafminer in many parts...

Author(s): Never Zekeya, Patrick A. Ndakidemi, Musa Chacha and Ernest Mbega

Performance variation among improved common bean (Phaseolus vulgaris L.) genotypes under sole and intercropping with maize (Zea mays L.)

February 2017

Periodic assessment of released common bean cultivars is essential to screen genotypes that offer superior intercropping advantage to farmers when grown in association with maize. Thus, comparative performance of improved genotypes representing commonly used growth habit and market classes were investigated under sole and intercropping system at Halaba special district, Southern Ethiopia. Treatments consisted of a...

Author(s): Rediet Abera, Walelign Worku and Sheleme Beyene

Validation of a phenological model for coffee tree productivity in Southern State of Minas Gerais, Brazil

February 2017

There are studies on the current state of understanding productivity models, focusing on the applicability of different estimation models for coffee tree productivity; the majority involving a considerable level of complexity. Thus, when searching for a simple and direct association between phenological characteristics and coffee productivity, doing research on this hypothesis is necessary. In this study, we aimed to...

Author(s): Wezer Lismar Miranda, Luiz Gonsaga de Carvalho, Joel Irineu Fahl, Rubens José Guimarães, Renato Ribeiro de Lima and Carlos Maurício Paglis

Climatization for scheduled ripening of caja-manga

February 2017

Being a climacteric fruit, the caja harvested still green has uneven ripening. Thus, the aim of this study was to evaluate the effect of ripening techniques aiming to promote a uniform ripening and reduction of quality loss in caja-manga fruits. The treatments resulted from the application of four ripening techniques (control, muffled, ethrel, and calcium carbide) and they were evaluated in 5 times, with 3 days...

Author(s): Ana Paula Silva Siqueira, Luis Henrique Costa Vasconcelos, Eduardo Pradi Vendruscolo, Bianca Schott da Silva Custódio, Daianna Pereira Costa, Tatiana Carvalho Faria and Alexsander Seleguini

Structure of soyabeans markets in Benue and Enugu States, Nigeria

February 2017

The importance of agricultural marketing in national development cannot be over-emphasized. The study examined the structure of soyabeans markets in Benue and Enugu States, Nigeria. Primary data were collected using questionnaire admininstered to 207 marketers. Data were analysed using descriptive statistics, regression model, HHI, Gini coefficient and lorenz curve. The result showed that the major determinants of...

Author(s): Dorothy P. ANI, Sonny A. N. CHIDEBELU and Anselm A. ENETE

Relations among phenotypic traits of soybean pods and growth habit

February 2017

This study aims to identify the phenotypic effects of traits associated with soybean pods and their growth habit. The experiments were carried out during the 2012 - 2013 agricultural year. It was done in randomized blocks arranged in a 2×20 factorial design (environments × soybean cultivars) with three replications. Data were subjected to individual analysis of variance for each environment and growth habit...

Author(s): Ivan Ricardo Carvalho, Maicon Nardino, Gustavo Henrique Demari, Vinícius Jardel Szareski, Diego Nicolau Follmann, Alan Junior de Pelegrin, Maurício Ferrari, Tiago Olivoto, Mauricio Horbach Barbosa, Antonio Costa de Oliveira, Luciano Carlos da Maia and Velci Queiróz de Souza

Basic experimental unit and plot sizes with the method of maximum curvature of the coefficient of variation in sunn hemp

February 2017

The influence of the basic experimental unit size on the plot size estimation determined by the method of maximum curvature of the coefficient of variation model is unknown in sunn hemp. This study aimed to verify the influence of the basic experimental unit (BEU) size in the estimate of the optimum plot size obtained by the method of maximum curvature of the coefficient of variation model for the evaluation of fresh...

Author(s): Giovani Facco, Alberto Cargnelutti Filho, Bruna Mendonça Alves, André Lavezo, Diego Nicolau Follmann, Cláudia Marques de Bem, Denison Esequiel Schabarum, Jéssica Andiara Kleinpaul, Gabriela Görgen Chaves, Daniela Lixinski Silveira, Fernanda Martins Simões, Daniela Barbieri Uliana and Cleiton Antonio Wartha

Rooting inducers and organic substrates in the propagation of 'Paluma' guava by cutting

February 2017

To produce seedlings with quality is one of the factors that mostly contribute to increase the production chain of a fruit crop. The use of organic substrates in the production of seedlings becomes a way to reduce costs by using raw material available regionally. Then, the aim of this study was to evaluate the influence of rooting inducers and the contribution of organic substrates to improve the rooting of herbaceous...

Author(s): Jussara Cristina Firmino da Costa, Rejane Maria Nunes Mendonça, Leandro Firmino Fernandes, Gerciane Cabral da Silva, Silvanda de Melo Silva, Walter Esfrain Pereira, Lourival Ferreira Cavalcanti and Lucimara Ferreira de Figueiredo

Spatial patterns of soil attributes in a fluvent in the semiarid region, Brazil

February 2017

Spatial variability studies on soil attributes are fundamental for adoption of best agricultural practices concerned with irrigated agricultural sustainability. This study aims to infer the spatial variability patterns of soil moisture, soils salinity and soil texture in an irrigated area of Pernambuco State (Brazil) under cultivation of carrot (Daucus Carota L.), during the dry period of 2012. The area is a typical...

Author(s): Carolyne Wanessa Lins de Andrade, Abelardo Antônio de Assunção Montenegro, Suzana, Maria Gico Lima Montenegro, Jucicléia Soares da Silva and Uilka Elisa Tavares

Physiological and agronomic characteristics of cassava genotypes

February 2017

This experiment was conducted with the objective of evaluating physiological and agronomic characteristics of cassava genotypes in the municipality of Cândido Sales, State of Bahia, Brazil, between October 2010 and August 2012. Complete randomized block design was used, with three replications and 28 treatments formed by genotypes Amansa Burro, Aramaris, Bom Jardim, Bromadeira, Caipira, Caitité, Caravela,...

Author(s): Douglas Gonçalves Guimarães, Caio Jander Nogueira Prates, Anselmo Eloy Silveira Viana, Adriana Dias Cardoso, Vanderlei da Silva Santos, Sylvana Naomi Matsumoto, Quelmo Silva de Novaes, Nelson dos Santos Cardoso Júnior and Sandro Correia Lopes

Effect of seed desiccation and sucrose concentration on the in vitro establishment of mangabeira (Hancornia speciosa Gomes var. gardneri) seedlings

February 2017

Mangabeira (Hancornia speciosa Gomes var. gardneri) is one of the most important fruit trees in the cerrado biome, its fruits being highly valued both for in natura consumption and for processing. Although its seeds are delicate, losing viability within a few hours after collection, seeds still represent the predominant tool of propagation multiplication of this species, since the plant encounters limitations in the...

Author(s): Marcos Paulo dos Santos, Renata Alves de Aguiar, Daniel Cardoso Brandão, Larissa Leandro Pires, Yuri de Oliveira Castro, Fabiano Guimarães Silva, Luciene Machado da Silva Neri, Débora Regina Marques Pereira, João Rodrigo de Castro and  Alexsander Seleguini

Adaptability and stability of wheat cultivars sown on different dates in West Paraná

February 2017

This study aimed to assess adaptability and stability of different wheat cultivars on different sowing dates in western region of Paraná, Brazil. The assay was composed by following wheat cultivars: CD 154, CD 1252, CD 108, CD 151, CD 1550, CD 104, CD 1440, CD 116, CD 150, and CD 1104, which were sown on three different dates: April 29th 2014, May 20th 2014, and June 26th 2014. The methods used to determine...

Author(s): Rafel Massahiro Yassue, Hugo Franciscon, Claudio Yuji Tsutsumi, Vanessa Aline Egewarth, Jonas Francisco Egewarth, Diandra Achre, Silvio Douglas Ferreira, Renan Silva Souza, Lorena Maia Noreto, Jeferson Piano and Paulino Ricardo Ribeiro Santos

Radiological hazard of coffee to humans: a comparative study of Arabian and Turkish coffees

February 2017

Thirty-nine Arabian and Turkish coffee powder samples purchased from various markets in Saudi Arabia were analyzed by High Pure Germanium (HPGe) gamma spectrometry to determine the activity concentrations of the natural and artificial radionuclides 238U, 226Ra, 232Th, 137Cs, and 40K. All samples, (except for two samples of Turkish coffee) were found to contain a high mean content of 40K, ranging from 839.83 to 1197.11...

Author(s): W. R. Alharbi and Zain M. Alamoudi

Peat influence on Zn tolerance, bioconcentration and bioaccumulation in Eucalyptus grandis Hill ex Maiden

February 2017

Soil contamination with zinc occurs in mining and agricultural areas through successive applications of pig slurry. Essential to the selection and adaptation of plants to contaminated soil, is the study of species showing not only tolerance but also bioaccumulation or bioconcentration of zinc associated with amelioration. In this context, this study aimed to evaluate the influence of peat addition on the tolerance,...

Author(s): Rodrigo Ferreira da Silva, Rudinei De Marco, Alex Negrini, Claudir José Basso, Vanderlei Rodrigues da Silva, Alexandre Swarowsky, Douglas Leandro Scheid , Marcia Matsuoka, Clóvis Orlando Da Ros and Paola Daiane Welter

Performance of an improved manual cassava harvesting tool as influenced by planting position and cassava variety

February 2017

Cassava has become an important food security crop in Ghana over the years and in most parts of sub-Saharan Africa; making it the single most important source of dietary energy. Harvesting, one of the serious bottlenecks in the cassava production value chain, has received little attention in terms of mechanisation. Earlier attempts at mechanising cassava harvesting have been challenged mainly by inappropriate method of...

Author(s): Shadrack Kwadwo Amponsah, Joseph Nketiah Berchie, Joseph Manu-Aduening, Eric Owusu Danquah, Jonas Osei Adu, Adelaide Agyeman and Enoch Bessah

Productivity, nutritional quality and phenotypical stability of varieties of silage sorghum in Uberlândia, MG

February 2017

Sorghum (Sorghum bicolor (L.) Moench) is a good alternative for silage, especially in places with water scarcity and high temperatures, due to their morphological and physiological characteristics. Proper management contributes both to productivity and to the quality of forage. The present study was conducted with the following objectives: To evaluate the agronomic and bromatological performance of varieties of sorghum...

Author(s): Alyne Dantas Mendes de Paula, Evandro Fernandes de Abreu, César Henrique Souza Zandonadi, Fernanda Heloísa Litz and Carlos Juliano Brant Albuquerque

Abundance and distribution of Ixodid tick species infesting cattle reared under traditional farming systems in Tanzania

January 2017

Ticks and tick-borne diseases are serious constraints to livestock production in Tanzania and other sub-Saharan African countries. Despite this, knowledge on the abundance of tick species infesting cattle in most parts of Tanzania is insufficient or lacking. This study was conducted to identify species and establish the abundance of ticks infesting cattle in Mara, Singida and Mbeya regions of Tanzania. The ticks were...

Author(s): Isack Ibrahim Kerario, Walter Muleya, Sebastian Chenyambuga, Marja Koski, Seong-Gu Hwang and Martin Simuunza

Quality of seeds from Leucaena species stored under ambient conditions

January 2017

The objective of this research was to know the performance of the seeds from different species of the Leucaena genus (Leucaena leucocephala, Leucaena lanceolata, Leucaena diversifolia, Leucaena macrophylla and Leucaena esculenta), stored under ambient conditions and subject to an evaluation of their physical, physiological and sanitary quality. The material came from the harvests of the collection planted at the...

Author(s): Hilda B. Wencomo, R. Ortíz and J. Cáceres

Physiological aspects in cotton cultivars in response to application leaf gibberellic acid

January 2017

The cotton plant is a species of the Malvaceae family and is relevant to the Brazilian and world economy, mainly because of the textile fiber. However, there was an increase in cotton production because it is necessary for the use of inputs or stimulants, such as the use of gibberellic acid, which has contributed in improving the physiological processes of plants. The study aimed to evaluate the effects of gibberellic...

Author(s): Jussara Cristina Firmino da Costa, Demetrius José da Silva, Antônio Gustavo de Luna Souto, Valdinei Sofiatti, Luciana Domiciano Silva Rosado, Antonio João de Lima Neto and Carlos Eduardo Magalhães dos Santos

Stalk productivity and quality of three sugarcane varieties at the beginning, in the middle, and at the end of the harvest

January 2017

This paper evaluated the stalk productivity and quality of the RB961552 and RB98710 sugarcane varieties, compared with RB92579, during the cane-plant and regrowth cycles. The study was conducted in a random block experimental design with five repetitions. The plots composed of 7 furrows measuring 8 m in length with 1.0 m spacing. Juice quality from the lower, middle, and upper thirds of the industrialized stalks was...

Author(s): Daniele Costa de Oliveira, Mauro Wagner de Oliveira, Manoel Gomes Pereira, Tâmara Cláudia de Araújo Gomes, Vinicius Santos Gomes da Silva and Terezinha  Bezerra Albino Oliveira

Sanitary analysis, transmissibility and pathogenicity of fungi associated with cashew nuts

January 2017

There are few reports of transmission of fungus associated with cashew nuts (Anacardium occidentale L.) in Brazil and worldwide. Thus, the aim of this study was to evaluate the incidence and severity of anthracnose on leaves and fruits (nuts) of cashew, nuts sanitary analysis, nuts-seedling transmission and pathogenicity of fungi associated with cashew nuts. To this end, leaves and nuts of cashew collected in the cities...

Author(s): Jaíza Francisca Ribeiro Chagas, Solange Aparecida Ságio, Evelynne Urzêdo Leão, Aloísio Freitas Chagas Júnior, Marcos Vinicius Giongo, Raimundo Wagner de Sousa Aguiar, Rodrigo Ribeiro Fidelis and Gil Rodrigues dos Santos

Determination of heavy metals in the roasted and ground coffee beans and brew

January 2017

Some compounds present in coffee beans can affect consumer health. The present study determines the content of heavy metal in coffee cultivated in the Cerrado Mineiro region (Alto Paranaíba – MG, Brazil), to compare the values found with the legal standards and check how these metals are extracted from the respective infusions. Fifty samples of coffee beans were analyzed, taken from the Alto...

Author(s): Sabrina Alves da Silva, Fabrícia Queiroz Mendes, Marcelo Rodrigues Reis, Flávia Regina Passos, André Mundstock Xavier de Carvalho, Kátia Rodrigues de Oliveira Rocha and Frederico Garcia Pinto

Spatial variability of soil physical and chemical aspects in a Brazil nut tree stand in the Brazilian Amazon

January 2017

The Brazil nut is considered one of the noblest trees of the Amazon biome and contains social, ecologic and economic importance to this region. The study of the spatial variance of the edaphic properties in native nut trees can direct future researches about more efficient samplings. The Geostatistics is the methodology utilized for this type of study, once that it considers the structural and random characteristics of...

Author(s): Quêzia Leandro de Moura Guerreiro, Raimundo Cosme de Oliveira Júnior, Gérson Rodrigues dos Santos, Maria de Lourdes Pinheiro Ruivo, Troy Patrick Beldini, Eduardo Jorge Maklouf Carvalho, Katia Emidio da Silva, Marcelino Carneiro Guedes and Paulo Roberto Brasil Santos

Phytosociology and weed interference in okra under organic cropping system

January 2017

A research was carried out to study phytosociology and to determine the periods of weed interference in the okra crop in organic cropping system. The experiment was laid out in a randomized complete block design with 20 treatments and four replications. The treatments were 10 periods of weed coexistence with the crop during 0-7, 0-14, 0-21, 0-28, 0-35, 0-42, 0-49, 0-56, 0-63 and 0-74 days after crop emergence (DAE) and...

Author(s): Raimundo Nonato Viana Santos, Antonia Alice Costa Rodrigues, Maria Rosangela Malheiros Silva, Maria José Pinheiro Correa and Mario Luiz Ribeiro Mesquita

Anti-atherogenic properties associated with the antioxidant activity from the hydrophilic extracts of Halimeda incrassata (Chlorophyta, Bryopsidales)

January 2017

Seaweeds are a source of natural antioxidants having potential application in oxidative stress and associated diseases. In this work, anti-atherogenic properties associated with the antioxidant activity from the hydrophilic extracts of Halimeda incrassata were studied. The phenolic content assessed in the aqueous extract and fraction phenolic acids (FPA) was 0.13 ± 0.05 and 0.47 ± 0.09 mg of gallic acid...

Author(s): Alexis Vidal-Novoa, Ariadna Costa-Mugica, Yenisleidy Zulueta-Díaz, Daylín Diaz-Gutierrez, Ana Mara de Oliveira e Silva, Ana María Vazquez, Claudina Zaldívar-Muñoz, Dalva Assunçao Portari de Mancini and Jorge Mancini-Filho

Controlled water stress in uniformity of maturity and productivity of conilon coffee

January 2017

The aim of this work was to evaluate the uniformity of fruit maturity and the productivity of conilon coffee in function of different periods of water stress in the post-harvest period. The study was conducted in a field from August 2014 to July 2015 in an old coffee crop of conilon coffee, cultivar Vitória 'Incaper 8142', cultivated at a spacing of 3.0 × 1.2 m, located at the Federal Institute of...

Author(s): Jorge Montoanelli Correa⊃, Gustavo Haddad Souza Vieira⊃, Diego Corona Baitelle⊃, Jéssica Broseghini Loss⊃, Paola Alfonsa Vieira Lo Monaco⊃, Ismail Ramalho Haddade⊃, Caroline Merlo Meneghelli⊃, Vítor Vargas Schwan, Renan Birchler and Fernando Zanotti Madalon⊃

Analysis of colourfastness of fabrics treated with dyes extracted from Roselle calyces

January 2017

The dyeing potential of roselle (Hibiscus sabdarifa) extract variously extracted by boiling, steeping and ethanol solvent were evaluated with three dye fixatives (potassium aluminum sulphate (alum), tannic acid, and citric acid), to study their effects on cotton (100%), stone silk (60% silk:40% polyester) and polyester (100%) fabrics. Colourfastness to sunlight, washing, perspiration (acid and alkali) and rubbing...

Author(s): Ozougwu Stella U. and Anyakoha U.

Improving the competitiveness of dairy production via value chain approach: The case of Lemu-Bilbilo district in Arsi highlands of Ethiopia

January 2017

This study was initiated with the purpose to assess the dairy value chain in Lemu-Bilbilo district of Arsi zone, Ethiopia. This study made use of both qualitative and quantitative data collected from primary and secondary sources. Different Participatory Rural Appraisal (PRA) techniques were utilized to collect primary data in July 2012. The dairy value chain in Lemu-Bilbilo district involves six distinct value adding...

Author(s): Mesay Yami, Bedada Begna and Getachew Legese

Standardizing germination tests for quinoa seeds

January 2017

The standard germination tests have been commonly used on commercial grain crops, such as soybean, field beans, rice and maize. However, there are no standard tests for potential new crops; quinoa being one of them. This work is aimed at evaluating the effect of substrate, temperature and counting time in seed germination of quinoa. The following treatments were used in tests with seeds: on blotter paper, between...

Author(s): Flívia Fernandes de Jesus Souza, Julia Emanuela Almeida de Souza, Nara Oliveira Silva Souza, Carlos Roberto Spehar and Thais Fernandes de Jesus

Study on termite damage to different species of tree seedlings in the Central Rift Valley of Ethiopia

January 2017

A high density of termite mounds is common in the Maki-Batu area of the Central Rift Valley of Ethiopia. To determine whether farmers consider termites as one of their problems in growing trees and practices they use to manage termites, short semi-structured questionnaires were distributed to farmers selected randomly. To evaluate the efficacy of some non-chemical control methods, Eucalyptus camaldulensis seedlings of...

Author(s): Daniel Getahun Debelo and Emana Getu Degaga

Incidence of viruses and virus-like diseases of watermelons and pumpkins in Uganda, a hitherto none-investigated pathosystem

January 2017

Common impromptu observations between 2010 and 2012 of apparent virus-like disease symptoms in watermelons and pumpkins in Uganda prompted this study. However, there was no recorded evidence of virus infection in these crops anywhere in Uganda or eastern Africa as a region. Thus, 374 and 522 watermelon and pumpkin plants, respectively, growing in 13 fields were surveyed to record virus-like disease symptoms in...

Author(s): Fred B. Masika#, Ronald Kisekka, Titus Alicai and Arthur K. Tugume#

Nitrogen and potassium fertirrigation on yield characteristics of Italian Zucchini in protected cultivation

January 2017

This study aimed to evaluate the effect of different doses of nitrogen and potassium applied through fertirrigation on yield characteristics of Italian Zucchini, Novita Plus cultivar. The experiment was conducted in a greenhouse at the Irrigation Technical Center of the State University of Maringá, Maringá - PR, adopting a completely randomized design in a 4 x 4 factorial scheme, with three replications....

Author(s): André Felipe Barion Alves Andrean, Cláudia Lozano Salim, Tiago Luan Hachmann, Roberto Rezende and André Ribeiro Da Costa 

Determinants of the Brazilian Amazon deforestation

January 2017

The Amazon rainforest is the world’s largest biome, containing almost 50% of the planet’s known biodiversity and is the biggest source of fresh water, which is approximately one-fifth of the global reserves. However, the sustainable use of this ecosystem is threatened by several factors, and deforestation is the main problem. This study addresses the deforestation of the Brazilian Amazon forest, in...

Author(s): Pedro Guilherme de Andrade Vasconcelos, Humberto Angelo, Alexandre Nascimento de Almeida, Eraldo Aparecido Trondoli Matricardi, Eder Pereira Miguel, Álvaro Nogueira de Souza, Maristela Franchetti de Paula, Joaquim Carlos Goncalez and Maísa Santos Joaquim

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

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

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

Variation of leaf area index of the forage sorghum under different irrigation depths in dynamic of cuts

January 2017

The determination of leaf area index is a variable of great importance for predicting productivity, especially when it comes to forage species where the desired product is the leaves. This study aimed to determine the variation of the leaf area index of forage sorghum when subjected to different irrigation depths in four culture cuts. Treatments consisted of six irrigation depths, these being 0, 60, 80, 100, 120 and...

Author(s): Jardel Henrique Kirchner, Adroaldo Dias Robaina, Marcia Xavier Peiter, Wellington Mezzomo, Rogério Ricalde Torres, Leonita Beatriz Girardi, Bruna Dalcin Pimenta, Ricardo Benetti Rosso, Anderson Crestani Pereira and Marcos Vinícius Loregian

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

Mathematical models to estimate leaf area of citrus genotypes

January 2017

Mathematical models were developed, using 22 different genotypes of citrus, to estimate leaf area. The information of the relationship between leaf length and width (L/W)2 for simple leaf blade form (eliptic, ovate, obovate, lanceolate); and length of the three folioles (L2+L3)/L1 for a compound leaf (trifoliate leaves), was used with the purpose to separate group of similarities of leaf blade form and promote...

Author(s): Alexandre Dias Dutra, Maurício Antonio Coelho Filho, Amábili Gunes Viana Pissinato, Abelmon da Silva Gesteira, Walter dos Santos Soares Filho and Marilene Fancelli

Page 29 of 135, showing 50 records out of 6709 total, starting on record 1401, ending on 1450