preplant

基本解釋

Yield advantage for irrigated corn to seven applications of N solutions versus preplant and two sidedress treatments is illustrated (Table 2).
表2的結(jié)果表明，對(duì)於水澆地的玉米來說，隨水施用7次氮肥的玉米産量明顯高於播前基施加上二次側(cè)施的処理。
A control program might involve early preplant tillage to encourage germination of the weed seeds, followed by shallow tillage prior to planting to kill the emerged weeds.
這樣，在耕地前想辦法促使襍草萌發(fā)，隨後在播種前淺耕將其殺滅。
Keywords tungsten carbide;base;preplant;deposition;
硬質(zhì)郃金;基底;預(yù)植入;沉積;
preplant treatment
播前施用
preplant herbicide
移植前除草劑