March 2016
Review of sheep crossbreeding based on exotic sires and among indigenous breeds in the tropics: An Ethiopian perspective
The objective of this review paper is to examine whether or not sheep crossbreeding is a feasible option to improve indigenous sheep breeds in developing countries using Ethiopian case as example. The paper reviewed and discussed the history of exotic breed introduction, research, and development efforts in crossbreeding and performance of crossbreds under on-station and on-farm management. Earlier, the choice of breed...
March 2016
Persistence of 2,4-D and glyphosate in a Cerrado soil, Brazil
The state of Mato Grosso is the main grain producer in Brazil, and weeds occurrence remains the major obstacle in the production of these grains, also increasing herbicide consumption. The aim of this study was to assess 2, 4-dichlorophenoxyacetic acid and Glyphosate (N-phosphonomethyl-glycine) herbicides mixture persistence in soybeans of Ultisol in the Brazilian Cerrado. The study was conducted in a greenhouse with...
March 2016
Degradation of reserves of crambe seed (Crambe abyssinica) during germination
The aim of this study was to determine how lipids, total soluble sugars and starch are degraded during the germination process of crambe seeds (FMS Brilhante Cultivar). The experiment consisted of collecting seeds during every day of the germination test (0, 1, 2, 3, 4, 5, 6 e 7 days) during which were also held the germination counts. After collection, the proportion of seeds and / or seedlings was designed for the...
March 2016
Water use efficiency of sunflower genotypes under drip irrigation
This investigation was conducted to determine the productivity and water use efficiency (WUE) for new sunflower genotypes obtained from selfing and induced mutation. Ten sunflower genotypes were evaluated under drip irrigation using two treatments of irrigation (100 and 75% from water requirement of sunflower). Statistical analysis showed that there were significant differences among genotypes, as well as between...
March 2016
Herd mortality and cattle off-take rates among small-holder producers in the North West Province of South Africa
This study was done to determine the influence of herd mortality on off-take rates through face to face interviews of 308 smallholder cattle producers from Dr RSM District Municipality, North West. Most deaths were caused by diseases (50%) and drought (34%). Producer’s gender had no influence on herd performance and off-take even though extension ward with higher proportion of women had higher mortality and lower...
March 2016
Partial diallel analysis among maize lines for characteristics related to the tassel and the productivity
Diallel crosses are important to the prediction of the best combinations among different heterotic groups of maize lines. The work objective was to estimate the combining ability among inbred lines from two heterotic groups to predict the best combinations in traits related to tassel and grain yield, conducted in five environments in the southern region. The inbred lines of the two heterotic groups are from the company...
March 2016
Abscisic acid content in roots and root characteristics of alfalfa under deficit irrigation
The effect of drought stress on Abscisic acid (ABA) on roots and root characteristics of three alfalfa varieties (Aohan, Zhongmu No.1 and Suntory) was studied. The study was conducted in greenhouse of the Chinese Academy of Agricultural Sciences (CAAS), Beijing, China from September 2014 to May 2015. Alfalfa varieties were exposed to four irrigation levels of water-holding capacity viz 100% (w1) (control); 85% (w2); 70%...
March 2016
Microbiological features of dystroferric and dystrophic red oxisols under sugar cane crops subject to different management procedures
The Quirinopolis microregion (QMR) is located in the Southwestern Goiás State, and represents the recent expansions of sugar cane crops in the state. The maintenance of the agricultural and forest ecosystem productivity depends largely on the organic matter transformation process and therefore on the microbial biomass. The goal of this study was to evaluate the effects of the different management methods used in...
March 2016
Construction and assessment of a hydraulic weighing lysimeter
Hydraulic weighing lysimeters have been showing good results in evapotranspiration studies. Thus, the aim of this study was to construct, calibrate, and assess a small (0.7 m3) and low cost hydraulic weighing lysimeter. The lysimeter consists of two containers. The inner container has a circular area of 1 m2​​ and volume of 0.7 m3, while the outer container is constructed with concrete slabs. The inner container is...
March 2016
Identification of new descriptors for differentiation of soybean genotypes by Gower algorithm
The descriptors used to differentiate new soybean cultivars which ensure their protection, has become insufficient. This makes evident the need to expand the list of that already used. The morphological traits that may be used as descriptors can be quantitative or qualitative; however, in the evaluation of their efficiency, they are not always analyzed simultaneously. Thus, this study aimed to identify new morphological...
March 2016
Effects of field attack by Ceratitis capitata Wiedemann (Diptera: Tephritidae) on the morphology and nutritional quality fresh fruit of Citrus sinensis L.
The sweet orange, Citrus sinensis L. is an important fruit crop in Nigeria and its production is seriously constrained at maturity by attack of the fruit fly, Ceratitis capitata which results in severe yield loss. Effects of attack by C. capitata on fruit morphology and nutritional characteristics of C. sinensis from selected sites in southwest Nigeria were investigated. Twenty five mother citrus trees with >45 cm...
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