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精密播种是一项先进的耕作方法。它的目的是使种子得到良好的出苗条件,且在随后的生长过程中使全体植株得到最好的营养面积分布,因而获得高产,以及节约良种和间苗工时。所以,它具有良好的经济效益。自从精密播种推广以来,在试验中首先碰到的问题就是试验方法问题,试验方法不同、评定指标不同,都直接影响到对作物质量的评价。不合理的试验方法和指标可能把好的机具评为差的,把差的评为好的。合理的试验方法应当符合以下原则:
Precision sowing is an advanced farming method. Its purpose is to achieve good seedling emergence conditions, and to obtain the best nutrient area distribution for all plants during subsequent growth, thus achieving high yields and saving seed and seedling man hours. So, it has good economic benefits. Since the precision sowing and popularizing, the first problem encountered in the experiment is the problem of the test method, the different test methods and the different evaluation indexes, which all directly affect the evaluation of crop quality. Unfair test methods and indicators may rate good equipment as poor and bad as good. Reasonable test methods should meet the following principles: