Changes in Growth and Oil Yield Indices of Rapeseed (Brassica napus L., cv. Hyola 401) in Different Concentrations andTimes of Application of Supplementary Nitrogen Fertilizer
In order to investigate the effect of concentration and time of supplementary nitrogen fertilizer spray on growth indices of rapeseed (cv.Hyola 401), a field experiment was conducted at Rice Research Institute of Iran as a randomized complete blocks design with 16 treatments and 3 replications in 2008-2009.The treatments included concentration of n