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华北棉区里,普遍掀起了丰产运动的热潮,优良棉种是丰产的一种要素,现在就来谈谈棉种:一、从植物分类来谈棉种:世界上主要栽培的棉种可分
Cotton fields in North China generally set off a fever of high-yielding motifs. Fine cotton seeds are an essential element of high yield. Now we talk about cottonseeds: First, we talk about cottonseed species from the plant classification: the main cultivars of cotton in the world can be divided