农作物的萌发、生长、发育、死亡以至收获、传代,怎样才能做到合乎生物生生死死的自然规律,促控其顺遂发展,获得丰收,在我国众多的古代农书中,都着重有所记述。围绕着利和害、得和失两方面,多数古农书有着比较精辟的理论分析,有的还不厌其烦地作了利害得失的对比研究,指导人们趋利避害。这些理论大多含有科学真理,不容乖违。不过,大都是限于技术性的, The germination, growth, development, death and even the harvest and passage of crops, how can we achieve the natural law of biological life and death, and promote the smooth development of its harvest, a great harvest in many of our ancient agricultural book, . Around the harm and gain, gain and loss of two aspects, the majority of ancient books have a more brilliant theoretical analysis, and some do not take the trouble to make a comparative study of the pros and cons, to guide people to profit and avoid disadvantages. Most of these theories contain scientific truths that can not be unjustly violated. However, most are limited to technical,