TIME OF APPLICATION AND SOURCE OF NITROGEN FERTILIZER ON YIELD, QUALITY, NITROGEN RECOVERY, AND NET RETURNS FOR DRYLAND FORAGE GRASSES

摘要: Studies were conducted in Saskatchewan for 4 yr at Swift Current (Brown soil zone) and 3 yr Scott (Dark Brown to assess the effect of time application source N fertilizer on grass forage yields P content, recovery net returns. A single rate N, 50 kg ha−1 was applied established stands three dates during late fall early winter period one or two spring period. Six species grown Scott. At there significant differences dry matter between but no × interactions. Fertilizer April generally gave highest concentration, recovery, returns, sometimes October and/or November applications provided as good better results. relative (averaged over N) different were: April, 158; October, 154;...