preplant

基本解释

Yield advantage for irrigated corn to seven applications of N solutions versus preplant and two sidedress treatments is illustrated (Table 2).
表2的结果表明，对于水浇地的玉米来说，随水施用7次氮肥的玉米产量明显高于播前基施加上二次侧施的处理。
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.
这样，在耕地前想办法促使杂草萌发，随后在播种前浅耕将其杀灭。
Keywords tungsten carbide;base;preplant;deposition;
硬质合金;基底;预植入;沉积;
preplant treatment
播前施用
preplant herbicide
移植前除草剂