African Journal of
Agricultural Research

  • Abbreviation: Afr. J. Agric. Res.
  • Language: English
  • ISSN: 1991-637X
  • DOI: 10.5897/AJAR
  • Start Year: 2006
  • Published Articles: 6848

AJAR Articles

Seeding rate and physiological quality of dual purpose wheat seeds

October 2016

Wheat dual purpose (Triticum aestivum L.) has elevated biomass production, high tillering potential, long vegetative stage, short reproductive period. Therefore, this study aim to reveal the seeding rates effect on physiological attributes of wheat dual purpose seeds grown in three agricultural crops, and identify a population management strategy and check the response stability of the traits in southern Brazil. The...

Author(s): Vinícius Jardel Szareski, Ivan Ricardo Carvalho, Maicon Nardino, Gustavo Henrique Demari, Alan Junior de Pelegrin, Mauricio Ferrari, Diego Nicolau Follmann, Tiago Corazza da Rosa, Etiane Skrebsky Quadros, Tiago Pedó, Paulo Dejalma Zimmer, Velci Queiróz de Souza and Tiago Zanatta Aumonde

Selection of S0:2 maize progenies using a mixed-model approach

October 2016

In breeding programs, obtaining breeding lines was important, and first selfing selection generations is common. In addition, an analytic approach through mixed models can lead to more success in genotype selection because it lends flexibility in analysis of unbalanced data and provides more precise genotypic values in regard to progenies evaluated. The goal of this study was to make early selection (in the S2...

Author(s): Leandro Lopes Cancellier, Luiz Paulo Miranda Pires, Luiz Antonio Yanes Bernardo Júnior, Ewerton Lelys Resende, Eduardo Lopes Cancellier and Renzo Garcia Von Pinho

Seeding density of Brachiaria ruziziensis intercropped with grain sorghum and effects on soybean in succession

October 2016

Sorghum is an alternative crop to produce grains in the off-season in Brazilian Cerrado and the intercropping with Brachiaria species enable to produce dry matter on the soil surface for a longer time. However, there is limited information on Brachiaria ruziziensis seed density to be applied to intercropping with sorghum without causing decreases in sorghum grain yield. The objective of the study was to evaluate the...

Author(s): Larissa Pacheco Borges, Alessandro Guerra da Silva, Maria Mirmes Paiva Goulart, Itamar Rosa Teixeira, Gustavo André Simon and Kátia Aparecida de Pinho Costa

Germination capacity of some halophytic plants species under increasing salinity

October 2016

In Tunisia, more particularly in semiarid and arid areas, the drought accentuated by the surface evaporation of water lead to gradual increase in salinity of the soil which a major hurdal in development of vegetation. In these highly salted ecosystems, some plants are growing naturally; however, various species show different tolerance levels to salinity during their development. Seed germination is the stage which is...

Author(s): Hichem Hajlaoui†, Samira Maatallah†, Nawel Nasri and Hafedh Nasr

Agronomic performance of local and introduced plantains, dessert, cooking and beer bananas (Musa spp.) across different altitude and soil conditions in eastern Democratic Republic of Congo

October 2016

Agronomic performances of local and exotic Musa species were evaluated across seven agro-ecologies in Eastern Democratic Republic of Congo. Generally, all the cultivars performed well. Mean bunch yields varied between 11 and 42 kg across different use groups and agro-ecologies. Introduced cultivars had higher or comparable yields to the local cultivars across agro-ecologies. The exotic beer cultivar ‘NARI...

Author(s): M. Kamira, J. Ntamwira, C. Sivirihauma, W. Ocimati, P. van Asten, L. Vutseme and G. Blomme

Effect of Allium sativum (garlic) extract on the growth and nodulation of cowpea (Vigna unguiculata) and groundnut (Arachis hypogea)

October 2016

It has been demonstrated that symbiotic N2 fixation enhances soil fertility and productivity as well as increases carbon sequestration and nutrient conservation. Green house experiments were conducted to ascertain the effect of garlic extract on the nodulation of cowpea and groundnut plants. Different concentrations of the extract (20, 40, 60 and 80%), were applied to the plant at 2 weeks after planting. Both legumes...

Author(s): Martina T. V. Adeleke

Development of an automated system of aeration for grain storage

October 2016

Stored grain should be preserved as much as possible during storage process, because of the occurrence of chemical, biochemical, physical and microbiological changes. The grain storage process consists of storing this material for a later use after a certain period. This study aims at to develop a prototype for grain aeration; to develop a software to control aeration strategies; and to evaluate the development of...

Author(s): Arlindo Modesto Antunes, Ivano Alessandro Devilla, Antônio Cruvinel Borges Neto, Beethoven Gabriel Xavier Alves, Guiliano Rangel Alves and Mateus Morais Santos

Trichoderma-bean interaction: Defense enzymes activity and endophytism

October 2016

Biotic inducing agents such as Trichoderma spp. are an alternative for the induction of resistance by activating defense mechanisms of plants. This work aimed to study the interaction between bean and Trichoderma spp. evaluating the effects of the induction of resistance in bean through the defense enzymes activity and ability to endofitism. The experimental was design in randomized blocks, with four replications, being...

Author(s): Omari Dangelo Forlin Dildey, Laline Broetto, Bruna Broti Rissato, Edilaine Della Valentina Gonçalves-Trevisoli, Sidiane Coltro-Roncato, Emanuele Guandalin Dal’Maso, Cristiane Claudia Meinerz, Nicanor Pilarski Henkemeier, José Renato Stangarlin, Odair José Kuhn and Tulya Fernanda Barrientos Webler

Chemical composition and antioxidant capacity in edible biomass of tagasaste (Chamaecytisus proliferus var. palmensis)

October 2016

Tagasaste (Chamaecytisus proliferus (L. fit.) Link var. palmensis (Christ) Hansen and Sunding is a perennial fodder shrub naturalized in a range of environments for its valuable forage traits. This research was aimed at evaluating the seasonal variation in chemical composition, bioactive compounds and antioxidant properties in edible biomass components (leaves, twigs, flowers, and pods) of tagasaste grown in a...

Author(s): Leonardo Sulas, Simone Canu, Antonio Melchiorre Carroni, Giovanni Antonio Re, Mauro Salis and Giovanna Piluzza

Yield and growth characteristics of Cowpea (Vigna unguiculata) as affected by prior heat stress and nutrient addition

October 2016

In the tropics, high temperatures and nutrient inaccessibility are often the most limiting factors affecting plant growth and final crop yield. However, it remain incomprehensible the actual impact of simultaneous interaction of prior heat stress and nutrient addition on growth and yield of cowpea plant, knowing that  cowpea plant is an important grain legumes for over 200 million people in dry savanna of tropical...

Author(s): Olusanya A. OLATUNJI, Gideon O. OKUNLOLA, Emmanuel T. KOMOLAFE , Akinjide M. AFOLABI, Akash TARIQ, and Ademayowa A. ODELEYE

Growth and production of a Japanese cucumber crop under pulse irrigation

October 2016

Water is the most important production factor in agriculture, since even small restrictions to the water supply can result in decreased productivity. Due to climatic reasons, water supply is limited in many parts of the world, resulting in a need to develop techniques that increase the water use efficiency. Pulse irrigation consists of the application of an irrigation depth, relative to the actual irrigation needed,...

Author(s): André Maller, Roberto Rezende, Paulo S. L. Freitas, Cassio C. Seron, Fernando A. Silva Santos and Jhonatan M. Oliveira

A review of geographic information systems and digital imaging in plant pathology application

October 2016

The increasing rate of disease incidence resulting from devastating effects of plant pathogens, limits crop productivity globally, thus affecting food security. The current global population growth with many mouths to feed is dependent on vibrant agricultural productivity. The effects of globalization, climate change, evolution of pathogens and vectors to mention a few, have combined to increase spread of invasive plant...

Author(s): A. B. Nwauzoma

Irrigation productivity and water-use efficiency in papaya crop under semi-arid conditions

October 2016

Papaya (Carica papaya L.) has a great economic importance in tropical and subtropical countries, Brazil being one of the largest producers of papaya  in the world. This crop requires a considerable amount of water during its cycle, making proper irrigation management essential for optimal water use. Improving water-use efficiency can increase levels of agricultural production as well as the efficient use of water...

Author(s): Erialdo de Oliveira Feitosa, Antonio Flávio Batista Araújo, Calorine Maria Bayma Oliveira, Fernando Bezerra Lopes and Eunice Maia de Andradre

Multivariate analysis of the genetic divergence among populations of ornamental pepper (Capsicum annuum L.)

October 2016

The genus Capsicum presents a wide genetic variability. The most common way to determine this variability has been based upon morphological descriptors. We studied the genetic divergence among populations of ornamental pepper (Capsicum annuum L.) using two different multivariate techniques: Cluster analysis and canonical discriminant variables. The analyses enabled us to determine the morphological descriptors that...

Author(s): Júlio Carlos Polimeni de Mesquita, Elizanilda Ramalho do Rêgo, Anderson Rodrigo da Silva, João José da Silva Neto, Lucas Chaves Cavalcante and Maílson Monteiro do Rêgo

Operating and energetic performance of the assembly tractor-scarifier in different liquid ballasting and working depths

October 2016

The working depth and ballasting are factors that can influence directly the operational and energy performance of a mechanized set. The objective of this study was to evaluate the operational and energetic performance of the set tractor-scarifier, working at three depths under two ballasting conditions. The study was conducted in the experimental area of ​​mechanization of the Department of Agricultural Engineering...

Author(s): Paulo Ricardo Alves dos Santos, Clice de Araújo Mendonça, Mara Alice Maciel dos Santos, Francisca Edcarla de Araújo Nicolau, Marcelo Queiroz Amorim, Maria Albertina Monteiro dos Reis, Carlos Alessandro Chioderoli and Danilo Roberto Loureiro

Exploitation of variability for salinity tolerance in maize hybrids (Zea mays L.) at early growth stage

October 2016

Salinity is extremely serious problem that has a drastic effect on maize crop, environment and causes economic losses of country. An advance technique to overcome salinity is to develop salt tolerant genotypes which require screening of huge germplasm to start a breeding program. Therefore, present study was undertaken to screen out 25 maize hybrids of different origin for salinity tolerance at seedling stage under...

Author(s): Abdul Qayyum, Hafiz Muhammad Saeed, Mamoona Hanif, Etrat Noor, Waqas Malik, Shoaib Liaqat, Kanwal Hanif and Naveed Murtaza

Phenotypic variability in Nigerian castor (Ricinus communis L.) accessions

October 2016

Ten accessions of Ricinus communis L. were grown in derived savannah agro-ecological zone for two cropping seasons under rain fed conditions. The work aimed at phenotypic characterization of R. communis for different qualitative and quantitative traits. The field characterization of the genotypes was done using randomized complete block design with three replications at the new site of Botanical garden, University of...

Author(s): Udoh, Obiora E. and Abu, Ngozi E.

Consequence of different ripeners on germination and initial growth of morning glory

October 2016

At the application time of sugarcane ripeners, most times, morning glory plants, that have escaped, survived or emerged, are entwined on sugarcane stalks and these plants are at this time in different reproductive stages (and it becomes more difficult to control) causing a mechanical and crop yield damage. The main aim of this research was to evaluate sugarcane crop ripeners effect on the seeds germination, seedling...

Author(s): Anne Elise Cesarin, Willians César Carrega, Pedro Figueiredo Rocha Barbosa Martins, Cárita Liberato do Amaral, Mariluce Pascoina Nepumuceno and Pedro Luis da Costa Aguiar Alves

Characterization of ‘Cabernet Sauvignon’ wine made with grapes from Campanha– RS Region

October 2016

Campanha region in the state of Rio Grande do Sul (RS) has received attention on grape production specifically ‘Cabernet Sauvignon’, ‘Merlot’ and ‘Tannat’. Due to the edafoclimatic peculiarities such as sandy soil, good thermal amplitude and sunshine, and low rainfall during the ripening period, it is supposed that the wine of this micro-region, in especially Bagé, might have...

Author(s): Renata Gimenez Sampaio Zocche, Suziane Antes Jacobs, Velci Queiróz de Souza, Maicon Nardino, Ivan Ricardo Carvalho, César Valmor Rombaldi, José Carlos Fachinello and Luíz Antenor Rizzon

Bioherbicide based on Diaporthe sp. secondary metabolites in the control of three tough weeds

October 2016

Brazilian growers are facing difficulties to manage the weeds Lolium multiflorum, Conyza sp. and Echinochloa sp. using commercially available agrochemicals in most crops. This study aims to evaluate the use of a bioherbicide based on fermented broth containing secondary metabolites of Diaporthe sp. to control L. multiflorum, Conyza sp. and Echinochloa sp. The bioherbicide activity in pre-emergence and post-emergence of...

Author(s): Maiquel P. Pes, Marcio A. Mazutti, Thiago C. Almeida, Luis E. Curioletti, Adriano A. Melo, Jerson V. C. Guedes and Raquel C. Kuhn

Treatment of bean seeds with plant extracts for controlling Zabrotes subfasciatus and its effects on physical and physiological quality during storage

October 2016

Bean crop occupies a prominent place in medium and large farming units in Brazil. Most of the time, the success of this crop depends, among other factors, on the use of good quality seeds at sowing; which requires strict quality control, harvesting, and storage. The objective of this study is to evaluate the effect of leaves and shells extracts of Aspidosperma pyrifolium Mart., Anadenanthera colubrina and myrtle...

Author(s): Elvira B. Pessoa, Francisco de Assis C. Almeida, Acácio F. Neto and Jucilayne F. Vieira

Evaluation of the gross and net calorific value of residues of wood pine and araucaria from reforestation

October 2016

The objective of this study was to assess the energy value of waste timber in the form of sawdust. Two types of wood: Araucaria (Araucaria angustifolia) and Pinus were evaluated with no defined species (Pinus sp). The sawdust was collected from a timber that receives wood from reforestation of these species in Southwestern Paraná, Brazil. The material collected was evaluated with a calorimeter bomb to determine...

Author(s): Marta Juliana Schmatz, Jair Antonio Cruz Siqueira, Carlos Eduardo Camargo Nogueira, Samuel Nelson Melegari de Souza, Luciene Kazue Tokura and Kleberson Luis Menezes and Darlisson Bentes dos Santos

Rice development and water demand under drought stress imposed at distinct growth stages

October 2016

This study aimed to establish a comparison for theoretical water demand between rice plants grown under flooding and under different levels of water stress, imposed at distinct crop stages, in terms of plant morpho-physiology and phenology. The experiment was installed in a greenhouse, using complete randomized design and factorial scheme 3 × 4 + 1, with four replications. Factor...

Author(s): Germani Concenço, José Maria Barbat Parfitt, Kelly Downing, Jacob Larue and Jaqueline Trombetta da Silva

Effects of rhizobacteria on Meloidogyne javanica infection on eggplants

October 2016

The effect of two rhizobacteria, Pantoea agglomerans and Bacillus subtilis on parasitism of the root-knot nematodes, Meloidogyne javanica on eggplants was evaluated in laboratory and greenhouse experiments. The impacts of the bacteria application as seed treatment, root dipping, and soil drench on early nematode penetration into plant roots, as well as, on eggplant growth were tested. The number of penetrated second...

Author(s): Melika Mohamedova, Donka Draganova, Iliyana Valcheva and Mladen Naydenov

Factors influencing smallholder crop commercialisation: Evidence from Côte d’Ivoire

October 2016

In this study, we analysed factors that influence crop output commercialisation among smallholder farmers in Cote d’Ivoire. Unlike previous studies, we correct for sample selection bias by using the Heckman maximum likelihood sample selection model with village fixed effects. We rely on a unique and detailed dataset that covers 3,393 smallholder farmers. The dataset was gathered from the 2014 National employment...

Author(s): Kotchikpa Gabriel Lawin and Wendkouni Jean-Baptiste Zongo

Multiple uses of forest resources in small and medium farms in the tropics: Economic and social contributions

October 2016

In complex systems, small anthropogenic changes of the initial conditions could lead to profound changes in the entire system. In this sense, the present literature review has surveyed several studies related to the multiple uses of forest resources and sustainability in small and medium-sized farms in the tropics. In 1985, Food and Agriculture Organization of the United Nations (FAO) published a work addressing...

Author(s): Benedito Albuquerque da Silva, Nidia Martineia Guerra Gomes, Leandro Skowronski, Michel Angelo Constantino de Oliveira and Reginaldo Brito da Costa

Shape and size relationships of Araucaria angustifolia in South Brazil

October 2016

Studies on morphology and occupancy area of trees provide knowledge on features and functions of forest ecosystem, especially in terms of competition and growth of trees. The main purpose of this work was to develop models for shape and size relationships of Araucaria angustifolia in natural forest remains of species. Dendrometric and morphometric variables from 210 trees from three sites were used. Results showed that...

Author(s): Myrcia Minatti, André Felipe Hess, Pollyni Ricken, Tascilla Magalhães Loiola and Isadora Arruda de Souza

Characterizing commercial cattle farms in Namibia: Risk, management, and sustainability

October 2016

Commercial cattle farming in semi-arid regions is subject to high rainfall risk. At the same time, it is prone to rangeland degradation. Theoretical works suggest that rainfall risk management by means of financial instruments may stabilize farming-derived income over the short-term, but provides little incentives for conservative rangeland management. Thus, the use of financial strategies of income stabilization may...

Author(s): Roland Olbrich, Martin F. Quaas and Stefan Baumgärtner,

Water content and soil nutrient in consortium of native fruit trees with cover crops

October 2016

The use of cover crops in intercropping is an important strategy for soil management and conservation, the improvement of edaphic conditions, and the optimization of cultivation of intercropped plants of commercial interest. The goal of the present study was to evaluate the water content and soil nutrient as well as initial growth of some fruit trees native to the Cerrado, Brazil. That is, Eugenia dysenterica Mart. ex...

Author(s): Paulo Dornelles, Adriano Perin, Fabiano Guimarães Silva, Aurélio Rubio Neto and Gabriel Bressiani Melo

Water use efficiency and growth variables of Operculina macrocarpa L. Urban grown in tropical environment

October 2016

Most of the population in developing countries still uses medicinal plants as the main source to meet their medical needs. Field experiments were carried out at tropical environment in Brazil in order to determine the main characteristics of ‘batata-de-purga’ (Operculina macrocarpa L. Urban), cultivated under 5 different levels of irrigation. The crop was cultivated with and without shading, using a plastic...

Author(s): Vicente de Paulo R. da Silva, Ricardo Pereira Veras, José Dantas Neto, Célia Campos Braga, Romildo Morant de Holanda and João Hugo Baracuy da Cunha Campos

Vermicompost of tannery sludge and sewage as conditioners soil with grown tomato#

October 2016

The objective was to evaluate the effect of tannery sludge vermicompost in the chemical properties of soil cultivated with tomato and irrigated with wastewater. The experimental design was completely randomized in a factorial 6 × 2, totaling twelve treatments with three replications. The treatments were: four tannery sludge vermicompost (25% Sludge tannery(LC) + manure - T1, 25% Sludge tannery(LC) + rice husk -...

Author(s): Cunha, A. H. N., Brasil, E. P. F., Ferreira, R. B., Vieira, J. A., Araújo, C. S. T., Silva, S. M. C.

Gas exchange in castor bean cultivars in response to foliar application of potassium silicate

October 2016

Since silicon and potassium are nutrients that influence plant physiological and biochemical aspects, the combined use of these minerals in the fertilization of cultivated plants has been increasingly investigated. This study aimed to evaluate the gas exchanges (Net photosynthesis, Stomatal conductance, Transpiration, Water use efficiency, Carboxylation efficiency, Internal carbon concentration, Chlorophyll a, b, total,...

Author(s): Jussara Cristina Firmino da Costa, Genelicio Souza Carvalho Júnior, Rosiane de Lourdes Silva de Lima, Hans Raj Gheyi, Valdinei Sofiatti and Maria Roselita André Soares

Effect of gypsum application on agro-energy performance of sugarcane varieties cultivated in a semi-arid environment

October 2016

Brazilian semi-arid soils can be dystrophic and often occur in areas with high agricultural potential. Gypsum application improves chemical and physical soil conditions, favoring root system development of plants and can improve sugarcane production for energy production, as a strategy for sustainable development, avoiding native vegetation destruction in semi-arid regions. This study aimed to analyze the impact of...

Author(s): Henrique Soares de Albuquerque, Alexandre Tavares da Rocha, Tiago Barreto Garcez, Renato Lemos dos Santos, Emídio Cantídio Almeida de Oliveira and Fernando José Freire

The influence of cover crops on erva de touro (Tridax procumbens)

October 2016

Tridax procumbens is an herbaceous plant belonging to the Asteraceæ family and popularly known as erva-de-touro or margaridinha. The objective of this study is to investigate the effects of cover crops when incorporated or maintained on the soil surface at different levels of straw, on the emergence and initial development of erva de touro. The experiment was conducted in a greenhouse during the period of May to...

Author(s): João Batista da Silva Oliveira, Adaniel Sousa dos Santos, Wéverson Lima Fonseca, Tiago de Oliveira Sousa, Leandro Pereira Pacheco, Aline Sousa dos Santos, Lisânia de Castro Medeiros and Alan Mario Zuffo

Effects of drought on yield and yield components of two contrasting growth habits of common beans (Phaseolus vulgaris L.)

October 2016

Common bean is grown by smallholder farmers in Malawi who produce low yield due to drought constrains. Two experiments comprising of two different bean growth habits (IIa and IVa) were conducted at Chitedze Research Station in Malawi, to assess eleven common bean genotypes for yield and yield components under drought conditions. Drought reduced significantly number of pods plant-1, number of seeds pod-1 and consequently...

Author(s): Chantiro, S. J, Bokosi, J. M., Chirwa, R. M. and Mkwaila, E. W.

Forage yield and nutritive value of naturally growing Brachiaria decumbens as undergrowth to an aroeira tree stand in a silvopasture system

October 2016

This study evaluated the forage yield and feed chemical composition of a Brachiaria decumbens natural pasture as undergrowth to a Myracrodruon urundeuva (aroeira) tree stand in a silvopasture system at  UNESP/Ilha Solteira, Selvíria, Mato Grosso do Sul, Brazil. Sampling was conducted in a completely randomized block design with a factorial scheme of two plots and two sub-plots, with plots as the light...

Author(s): Carla Renata Silva Baleroni Guerra, Mario Luiz Teixeira de Moraes, Camila Regina Silva Baleroni Recco, Cristina Lacerda Soares Petrarolha Silva and Flavia Maria de Andrade Gimenes

Physical properties of a latosol eutrophic red under management systems after different winter crops successful by the soybean crop

October 2016

The objective was to verify the influence of winter crops under management mechanical (roller knife) and chemical (glyphosate), on soil physical properties and yield of soybeans. The experiment was carried out at the field under randomized block design in tracks scheme. The treatments consisted of four different winter crops (oats IPR 126, wheat BRS Tarumãt crambe FMS Bright and forage radish cultivar common) in...

Author(s): Poliana Ferreira Da Costa, Paulo Sérgio Rabello De Oliveira, Jeferson Tiago Piano, Loreno Egidio Taffarel, Milciades Ariel Melgarejo Arrúa, Marcos Vinícius Mansano Sarto and Shaline Séfara Lopes Fernandes

Determination of parameters for selection of Eucalyptus clones tolerant to drought

October 2016

Climatic changes have induced the spread of aridity in many parts of the globe. Eucalyptus plantations show wide variations in productivity due to several factors, including climatic changes. Therefore, Eucalyptus genotypes that can adapt to such conditions is very welcome. Thus, an evaluation was done by comparing the physiological responses of two Eucalyptus genotypes, tolerant and drought-sensitive. They were...

Author(s): Inaê Mariê de Araújo Silva, Michael Willian Rocha de Souza, Any Caroliny Pinto Rodrigues, Luiz Paulo de Sousa Correia, Ronnie Von dos Santos Veloso, José Barbosa dos Santos, Miranda Titon, Janaína Fernandes Gonçalves and Marcelo Luiz de Laia

An optimization model for the combined planning and harvesting of sugarcane with maturity considerations

October 2016

Planting and harvesting are important stages in the sugarcane crop cycle, because well planned planting and harvesting phases promote a series of benefits throughout the cultivation cycle and in the subsequent industrial use of the products. These benefits are operational, economic and environmental such as: improved utilization of the land area and transport logistics; an increase in sugarcane output; better cane...

Author(s): Rômulo Pimentel Ramos, Paulo Roberto Isler, Helenice de Oliveira Florentino, Dylan Jones and Jonis Jecks Nervis

Effects of agricultural spray adjuvants in surface tension reduction and spray retention on Eucalyptus leaves

October 2016

Agricultural spray adjuvants (ASA) are widely used in pesticide applications to enhance the effective control of pest, weed and disease. The aim of this research was to investigate the effects of ASA used in Brazil agriculture on surface tension reducing capacity and foliar spray retention on different Eucalyptus species. Static surface tension of adjuvants at concentrations of 0.001, 0.0025, 0.005, 0.01, 0.025, 0.05,...

Author(s): Evandro Pereira Prado, Carlos Gilberto Raetano, Mario Henrique Ferreira do Amaral Dal Pogetto, Rodolfo Glauber Chechetto, Pedro José Ferreira Filho, Anderson Chagas Magalhães and Celso Tadao Miasaki

Systems of land use affecting nodulation and growth of tree legumes in different soils of the Brazilian semiarid area

October 2016

The growth of tree legumes in degraded areas must be preceded by assessments of nodulation ability of naturally established rhizobia populations since such information contributes to defining the species which can be planted for recovering disturbed areas. The aim of this study was to evaluate the growth and natural nodulation of “sabiá” (Mimosa caesalpiniifolia Benth.) and leucaena (Leucaena...

Author(s): Vinicius Santos Gomes da Silva, Carolina Etienne de Rosália e Silva Santos, Ana Dolores Santiago de Freitas, Newton Pereira Stamford, Aleksandro Ferreira da Silva and  Maria do Carmo Catanho Pereira de Lyra

Simulation of oat grain (Avena sativa) using its panicle components and nitrogen fertilizer

October 2016

Nitrogen fertilizer management modifies oat (Avena sativa) panicle components and its grain yield. The work aims to study the potential of the variables of oat (A. sativa) panicle with N-fertilizer, and to simulatate its grain yield using multiple linear regression in succession systems of high and reduced N-residual release. The study was done in 2013 and 2014. The experiment was done in a complete randomized block of...

Author(s): Rubia Diana Mantai, José Antonio Gonzalez da Silva, Emilio Ghisleni Arenhardt, Osmar Bruneslau Scremin, Ângela Teresinha Woschinski de Mamann, Rafael Zancan Frantz, Antonio Carlos Valdiero, Rafael Pretto and Dionatan Ketzer Krysczun

Growth and composition of sugarcane and chemical attributes of the soil by fertilizing with different levels of cow manure

October 2016

Four months after planting sugarcane variety RB867515, fertilized with 0.0, 4.5, 9.0, 13.5 and 18.0 Mg ha-1 of cow manure, there was positive linear effect of the fertilizer on plant height and stalk diameter, quadratic positive effect on width and length of the largest leaf, and no effect on number of plants m-1 linear and the number of leaves plant-1. At 10 months, there was quadratic positive effect of cow manure on...

Author(s): Geicimara Guimarães, Rogério de Paula Lana, Rosane Cláudia Rodrigues, Cristina Mattos Veloso, Renata de Souza Reis, Maria Regina de Miranda Souza and Silvane de Almeida Campos

Losses of pesticides in runoff from cotton crops under different management systems

October 2016

In this study the concentrations of the atrazine, desethylatrazine (DEA), desisopropylatrazine (DIA), azoxistrobin, carbendazim, carbofuran, chlorpyrifos, diuron, endosulfan alpha and beta endosulfan sulfate, malathion, metolachlor, methomyl, monocrotofos, permethrin, profenofos, teflubenzuron, thiacloprid, tiametoxan and triflumuron were assessed in runoff water from cotton plantations under different management...

Author(s): Isaltino A. Barbosa, Ricardo S. S. Amorim and Eliana F. G. C. Dores

Productivity and physical properties of corn grains treated with different gypsum doses

October 2016

The productivity of corn grains is directly associated with factors related to soil fertility, which are relevant to the application of gypsum (calcium sulphate), in addition to variables inherent to the grain. Thus, the objective of this study was to evaluate the variability of the physical properties of grains (circularity, roundness, bulk density, real density, volume and porosity) and production components...

Author(s): Vitor Marques Vidal, Frederico Antonio Loureiro Soares, Marconi Batista Teixeira, Fernando Nobre Cunha, Wilker Alves Morais, Nelmício Furtado da Silva, Cícero Teixeira Silva Costa, Giovani Santos Moraes, Janniny Alves Cabral and Flávio Henrique Ferreira Gomes

Occurrence of Cucumber mosaic virus, Zucchini yellow mosaic virus and Watermelon mosaic virus in cultivated and wild cucurbits in the coastal areas of Tanzania

October 2016

Cucurbit vegetables play important role as sources of vitamins, micronutrients and income. However, their production is constrained, inter alia, by the virus diseases. Cucumber mosaic virus (CMV; Cucumovirus), Zucchini yellow mosaic virus (ZYMV; Potyvirus) and Watermelon mosaic virus (WMV; Potyvirus) are the major causal agents of devastating virus diseases of the cucurbits. Disease symptoms similar to those caused by...

Author(s): Maria Sydänmetsä and Deusdedith R. Mbanzibwa

Smoke opacity of ethyl biodiesel from babassu and two types of diesel at different daytimes

October 2016

Renewable energy benefits and disadvantages have been subject of major discussions and studies. Thus, this study aimed at assessing the smoke opacity from a farming tractor running two types of diesel, B S1800 (B0) and B S10 (B0), and ethyl biodiesel from babassu oil at two rates (B50 and B100), at six day periods (2, 6, 10 am, 2, 6 and 10 pm). The study was conducted at the Department of Agricultural Engineering of the...

Author(s): Thyago Augusto Medeiros Lira, Thaisa Calvo Fugineri Moreti, Afonso Lopes, Ariston Pinto Santos, Melina Cais Jejcic de Oliveira, Murilo Coelho Theodoro Neves, Priscila Sawasaki Iamaguti, Leomar Paulo de Lima, Gilberto Hirotsugu Azevedo Koike and  Rogério de Abreu Silva

Effect of type of fuel and speed of engine on the performance of agricultural tractor

October 2016

Given the need for new alternatives to finite source of energy from fossil fuels, testing of alternative fuels has become quite important. Studies have been carried out using sets of tractor with equipment to evaluate the operational performance together with supplying diesel and biodiesel. Biodiesel is a feasible alternative as it waives adjustments in diesel cycle engines, unlike other clean fuels such as natural gas...

Author(s): Melina Cais Jejcic de Oliveira , Afonso Lopes, Leomar Paulo de Lima, Murilo Coelho Theodoro Neves, Priscila Sawasaki Iamaguti, Thyago Augusto Medeiros Lira, Thaisa Calvo Fugineri Moreti, Gilberto Hirotsugu Azevedo Koike, Ariston Pinto Santos and  Rogério de Abreu Silva

Agro-morphological diversity within field pea (Pisum sativum L.) genotypes

October 2016

The objective of this study was to analyze the genetic diversity present in twelve Algerian pea genotypes using 24 agro-morphological traits. The experiment was carried out during three growing seasons (2013 to 2014, 2014 to 2015 and 2015 to 2016). ANOVA analysis revealed the presence of a great genetic variability for all characters studied. This diversity might be used in breeding programs. Also, expression of...

Author(s): Leila Ouafi, Farida Alane, Hafida Rahal-Bouziane and Aissa Abdelguerfi

Effects of pre-germination treatments on Copaifera langsdorffii seeds

October 2016

Copaifera langsdorffii has been intensely exploited, since it attracts several interests, and is now on the list of endangered species. Due to this risk of extinction, seedling production of this species has important economic and social value. The aim of this study was to evaluate seed germination of C. langsdorffii subjected to different pre-germination treatments for breaking seeddormancy: i) control; ii) immersion...

Author(s): Camila Andrade Silva, Alexsandro Lara Teixeira, Rosa Luxemburgo Albuquerque Gomes, Fábio Renato Oliveira Marques, Aline Aparecida Smychniuk da Silva and Ana Carolina Andrade Silva

Page 35 of 137, showing 50 records out of 6848 total, starting on record 1701, ending on 1750