The nitrogen release character of ZP coated fertilizer and its effect on summer maize were studied by field plottest.
通过田间试验研究了包膜肥料ZP氮素释放特点和在夏玉米上施用效果。
2
Through years of survey and investigation of plottest and high-yielding cultivation, the grain number and spike of wheat were studied.
通过多年的小区高产栽培试验和高产攻关，对小麦的穗数、穗粒数进行了研究。
3
Combined potted plant, patch test, fixed plottest and great area demonstration. Study on the method combined different ecological basic point with local experiment.