The results of previous studies have suggested that estimated daily globalradiation (RG) values contain an error that could compromise the precision of subsequentcrop model applications. The following study presents a detailed site and spatial analysis ofthe RG error propagation in CERES and WOFOST crop growth models in Central Europeanclimate conditions. The research was conducted i) at the ei...

The aim of the study was to determine the technical and economic optimum levels of raw and treated common vetch seed (CVS) on the productive performance and egg quality traits in laying hens. One hundred and sixty-eight White (Lohmann) layers, 30 weeks of age were randomly assigned to seven groups, each with six replicate cages of four hens. Control diet (C) and basal diets supplemented with 12...

in order to evaluate the effects of cover crops on reduced weed biomass in hybrid sunflower an experiment was carried in the research stations, natural resources medicinal plants (samian_ardabile) with 3 replicates in 1390-1391. the first factor was considered three type of cover crops, winter rye, spring barley, winter wheat with 2 control treatment, second factor was mulch management at two l...

shortage of water has been a great consideration since ancient times in iran. the yearly average atmospheric precipitation in iran is around 250 mm considering the total area of the country, it can be estimated that our share of water is 420 x 109 per year. due to evaporation and run off to the sea through rivers and infliction it has been estimated the available water can not be more than 120 ...

In south-western France, sunflowers are usually grown in short rotations and after a long fallow period during which soils left bare. This practice can favour diseases, caused by soilborne fungi, such as sunflower verticillium wilt (SVW), well nitrate leaching, both of decrease yields. Growing cover crops is an agroecological that could provide ecosystem services mitigate SVW. A Brassicaceae cr...

in order to study the density and diversity of weeds and yield of barley and hairy vetch affected by mixed intercropping ratios, a field experiment was performed based on a randomized complete block design with four replications at the agricultural research station, college of agriculture, ferdowsi university of mashhad during growing season of 2012-2013. ratios of mixed intercropping were 75% ...

Winter cover crops have the potential to increase soil organic C in the corn (Zea mays L.)–soybean [Glycine max (L.) Merr.] rotation in the upper Midwest. Management effects on soil C, however, are often difficult to measure because of the spatial variation of soil C across the landscape. The objective of this study was to determine the effect of oat (Avena sativa L.), rye (Secale cereale L.), ...

in order to study the effect of intercropping of corn with bean and bitter vetch and farmyard manure (fym) on corn nutrition, a factorial experiment was carried out on the basis of randomized complete blocks design with three replications. the factors were types of intercropping systems at levels of sole bean, bean+corn, sole bitter vetch, bitter vetch+corn, sole corn, and fym at levels of 0, 3...