黑龙江省西部半干旱农业区推广“垄三”栽培法的技术关键黑龙江省农科院嫩江农科所于海林大豆“垄三”栽培法是针对三江平原土地低湿、透气性差的实际问题研究出来的，目前在适宜区已累计推广３０００多万亩，那么，在半干旱农业区能否推广此项技术？其技术关键是什么？为... Heilongjiang Province, semi-arid agricultural zone to promote “ridge three” cultivation method of the key technology Heilongjiang Academy of Agricultural Sciences Nongjiang Agricultural Institute of Hailin Soybean “ridge three” cultivation method is for the Sanjiang Plain land low humidity, poor air permeability developed from the actual problem At present, more than 30 million mu have been popularized in suitable areas. Can this technology be promoted in semi-arid agricultural areas? What is the key technology? for...