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对宁夏引黄灌区棉花适宜播种期和密度的研究与分析结果表明:棉花在该地区较佳的播种期是4月20～27日,较合理的密度范围是1.1～1.3万株/亩。
The results of reseach and analysis on suitable sowing date and density of cotton in irrigated areas of Yellow River in Ningxia showed that the better seeding period of cotton in this area was April 20-27, and the more reasonable range of density was 1.1-1.3 thousand / mu.