Nitrogen is essential for plant growth, and N fertilization allows farmers to obtain high yields and produce sufficient agricultural commodities. On the other hand, nitrogen losses potentially cause adverse effects to ecosystems and to human health. Increasing nitrogen use efficiency (NUE) is vital to solve the conflict between productivity, to secure the demand of a growing world population, a...

proper sowing date along with providing normal growth rate in rape oilseed plants significantly leads to higher seed and oil yield via decreasing cold damages. the experiment was conducted as factorial with two factors including sowing dates with 4 levels (12 and 23 september, 2 and 12 october) and genotypes with 5 levels (modena, licord, okapi, opera and zarfam) in three replications. the stud...

You may reproduce as many additional copies of this report as you like, provided such copies stipulate that copyright remains with English Nature, Northminster House, Peterborough PE1 1UA If this report contains any Ordnance Survey material, then you are responsible for ensuring you have a licence from Ordnance Survey to cover such reproduction. The aim of the project is to provide English Natu...

the introduction of canola (oilseed rape; brassica napus l.) as a new source of vegetable oil production in iran prompts evaluation of the performance of this crop under different tillage systems. a field experiment was conducted to determine the impact of depth and intensity of tillage on soil physical properties, crop establishment and yield of irrigated winter canola in a loam soil (typic ha...

EXTENDED ABSTRACT Gene flow is defined as the movement of genes between populations and is a naturally occurring phenomenon among sexually compatible individuals. Crops have exchanged genes with their wild and weedy relatives for centuries, however this process has recently caused concern. The rapid advances in genetic engineering have hit an immense wall of opposition and gene flow is now seen...