玉米是我国三大粮食作物之一，每年种植面积达2000多万公顷，仅次于水稻和小麦。当前玉米收获仍主要靠人工，劳动繁重；生产效率低，严重制约着“三秋”作业的进程，广大农民迫切要求实现玉米收获机械化。本文拟就外全对万米联合收获的需大．发展干米联合收获的限制因素和... Corn is one of the three major grain crops in China with annual planting area of ​​more than 20 million hectares, second only to rice and wheat. At present, the harvest of corn still depends on labor and laboriously. The production efficiency is low, which severely restricts the operation of “Sanqiu”. The majority of peasants urgently demand the mechanization of harvesting corn. This article is intended to be combined on the whole out of the 10,000 meters need to be harvested. Development of dry rice combined with the limiting factor and ...