August 2014
Kinetics and thermodynamic properties of the drying process of sorghum (Sorghum bicolor [L.] Moench) grains
The goal of this work was to fit several mathematical models to the experimental data from the drying of sorghum (Sorghum bicolor [L.] Moench) grains of the AS4620 cultivar, to determine and evaluate the effective diffusion coefficient, to obtain the activation energy and to determine the thermodynamic properties of the drying process at different temperatures and air speeds. The initial moisture content of 0.228...
August 2014
Tillage and rice-wheat cropping systems influences on soil physical properties: Water balance and wheat yield under irrigated conditions
Challenge of increasing food production in the next 20 years to match population growth is daunting and warrants improvement in the quality of natural resources for growing more food from marginal and degraded lands.Adopting a better tillage system does not only improve the soil health and crop productivity but also improves the environment. A field experiment was conducted to investigate the effects of tillage and...
August 2014
Determination of appropriate sowing date and phosphorus fertilization strategy for peanut in Eastern India
Eastern India, which is one of the major contributors in total food production of the country, is facing uncertainties of weather events during the recent years and farmers are encountering agricultural drought like situation, leading to reduction in major food grain production and productivity. To minimize the adverse effect of weather variability on the yield reduction of the major field crops of this area, the...
August 2014
Evaluation of some hybrids of canola in function of sowing dates in Viçosa, MG, Brazil
The canola constitutes an excellent option for cultivation in winter in Brazil, besides being an alternative for the production of biodiesel. The aim of this study was to evaluate the phenological characteristics of hybrid canola sown at different dates in Viçosa, MG. The experiment was conducted in the experimental area of Horta Velha, belonging to the Federal University of Viçosa (UFV). Seeds of four...
August 2014
Microbiological attributes in a latosol in glyphosate application under water deficit conditions
The objective of this study was to evaluate the effects of glyphosate on soil microbial activity under appropriate and water deficit conditions. The factors consisted of four treatments with different Roundup Ready® soybean cultivars, two herbicidal treatments [glyphosate (1.080 and 1.800 g a.e. ha-1) + control] and two soil moisture treatments (appropriate and water deficit conditions), plus two soybean...
August 2014
Insecticidal effect of Jatropha curcas L. seed oil on Callosobruchus maculatus Fab and Bruchidius atrolineatus Pic (Coleoptera: Bruchidae) on stored cowpea seeds (Vigna unguiculata L. Walp.) in Niger
We report the insecticidal efficacy of Jatropha curcas seed oil against two bruchid beetle species, Callosobruchus maculatus Fab and Bruchidius atrolineatus Pic, devastating stored cowpea seeds (Vigna unguiculata). J. curcas oil concentrations ranging from 0.0, 0.25, 0.5, 1.5, 2.5, 5.0 and 7.5 ml were mixed with 200 g of cowpea seeds before introduction of 10 pairs (5 males and 5 females) of C. maculatus or B....
August 2014
Spring-summer tomato yield as a function of potassium fertilization in field and protected crops
Off-season tomatoes produced in Southeast Brazil in Spring-Summer crops are highly valued, but crop yield is limited by high rainfall and temperatures. To overcome this situation and make off-season tomato crops more profitable, they can be grown under controlled conditions in protected cultivation systems. In addition, tomato yield and quality can be improved by adequate levels of potassium (K) fertilization. The...
August 2014
Phenology, biomass and yield of cowpea in terms of climate and trellis type
Cowpea (Vigna unguiculata (L.) Walp) is a considerable protein, carbohydrates, vitamins, minerals and fiber source. Indeterminate habit cultivars require trellis to achieve higher development. This practice increases production cost. Alternatively, crops like maize (Zea mays L.) and sunflower (Helianthus annuus L.) can be used to reduce expenses and provide physical support. Growth and yield of cowpea was evaluated...
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