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硬茬复播田杂草种类达15科27种。采用除草剂JNH－1，JNH－2或JNH－3进行苗前土壤处理，对已出苗和未出苗的杂草皆有极显著防效，一次用药不仅可保证作物苗期免遭草害，而且对作物生育后期的杂草也可达到有效控制。所用除草剂均对玉米、大豆安全。由于有效减轻了草害和虫害，大豆平均增产19．4％，玉米平均增产26．2％。
Hard stubble plots field weeds up to 15 families and 27 species. Pre-emergence soil treatment with herbicides JNH-1, JNH-2 or JNH-3 has extremely significant control effects on both weedy and non-emergent weeds. One-time treatment not only ensures that the seedlings of the crops are protected from grass damage but also The late crop growth weeds can be effectively controlled. Herbicide used are safe for corn and soybeans. Due to the effective mitigation of grass pests and pests, the average yield of soybean increased by 19.4% and that of corn by 26.2% on average.