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pest agricultural control
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pest agricultural control
Encyclopedia
农学
害虫农业防治
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pest agricultural control
害虫农业防治
基于农业生态系统中害虫-作物及其环境之间的相互作用关系,结合整个农事操作过程中的各种措施,有目的地改造农业系统中某些环境条件,使之不利于害虫发生而有利于农作物的生长发育,从而直接或者间接控制害虫的方法。害虫防治的重要措施。
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second derivative test
second derivative test discriminant
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second differentiator
second distance
second dual
second dual module
second dual space
second economics adjustment of China
second eigenfunction
second electron emission
Second Emperor of Qin Dynasty
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second factor
second fall-line
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