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一九七七至一九七九年,我们先后在黑龙江省海伦县和本所利用包衣种子和机械磨光的裸种进行了机械播种技术与保苗的试验研究工作。试验证明,影响播种质量和出苗
From 1977 to 1979, we conducted experimental research on mechanical sowing and seedling preservation using coated seeds and mechanically polished naked species in Helen County, Heilongjiang Province. Test proved that affect the sowing quality and emergence