It was showed that the mean concentration and accumulated amounts of runoff losses of nitrogen were highly correlated with N-applicationrates.
结果显示，随施氮量增加，农田径流液中氮素的平均浓度和氮素径流累积流失量提高，两者间呈显著正相关。
2
The nitrogen accumulation in cotton boll-shell, cottonseed, cotton fiber and single boll were significantly affected by the nitrogen applicationrates and their blooming stage.
铃壳、棉籽、纤维及单铃氮素累积受施氮水平和开花期的影响。
3
The applicationrates of boron greatly affected the spike differentiation of wheat. In a certain range, gross spikelets and available spikelets increased with the increasing rate of boron applied.