Does nitrogen application timing in canola matter?

To re-examine the effect of N rate and application timing on canola yield, seed oil and protein content, and apparent N fertiliser efficiencies.本研究旨在重新探究施氮量（N rate）与施用时期（application timing）对油菜产量、种子含油率与蛋白质含量，以及表观氮肥利用率（apparent N fertiliser efficiencies）的影响。