本文基于对云南富宁县播区的详细调查，得出了该县飞机播种造林成效及其原因。
Based on the detailed investigation in Funing County, Yunnan province, the authors discuss the effect of afforestation by planes and its reason.
东北部生态农业建设区由于耕地面积较少和人口较多的原因，粮食作物播种面积已无压缩余地。
The northeast ecological agriculture region has no space to adjust the crops sown area for the more population and few land.
研制了一种小型适用于小麦玉米两茬平作区的具有深松、播种、施肥功能的玉米免耕播种机，获国家实用新型专利。
A new corn zero tillage seeder with deep loosening and fertilization function, which can be used to seed corn in wheat corn plantation area, was developed.
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