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宁南山区小麦套种甘蓝数学模型的试验研究何建栋，彭桃芝，谢国豫（西吉县农业技术推广中心西吉７５６２００）小麦套种甘蓝是宁夏南部山区立体复合种植的主要类型之一，它既增产又增收。我们在大面积示范的同时，从１９９１年开始，结合生产实际，对关键性的定量指标，应...
Experimental Study on Mathematical Model of Wheat Seed Covering in South Ningxia He Jiadong, Peng Taozhi, Xie Guoyu (Xiji County Agricultural Technology Extension Center, Xiji 756200) Wheat seedling is one of the main types of three-dimensional compound planting in mountainous area of southern Ningxia. We are demonstrating a large area at the same time, starting from 1991, combined with the actual production, the key quantitative indicators should be ...