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1987年9月上中旬,作者与建始县的苏志平同志接受州委的指派,到黑龙江省中部的庆安和望奎县进行了“水稻旱育稀植栽培技术”的考察。“旱育稀植”就是在旱地育苗,在3.1～3.6叶时按株行距13.5×30厘米
In mid-September 1987, the author and Comrade Su Zhiping of Jianshi County accepted the appointment of the state party and went to Qing’an and Wangkui County in the central part of Heilongjiang Province to conduct a survey of “cultivation techniques of rice in dry and drought cultivation.” “Drought nursery thin planting” is nursery in the dry land, in the 3.1 to 3.6 leaves when the line spacing 13.5 × 30 cm