用数量分类法对前绵阳地区的稻麦棉进行分区

Classifying the production of Rice,Wheat and Cotton in forgone Mianyang prefecture Quantitatively

本文对前绵阳地区34年来(1949—1982)稻、麦、棉的平均产量及变异度进行了数量分类,结果是水稻分成4个区、小麦5个区、棉花4个区,此法克服了按地理、气候等单一环境分区的局限性,为作物区划提供了比较可靠的依据。

The average yields and standard deviations of the yields of rice,Wheat and cotton during 34 years (1949—1982) in forgone Mianyang prefecture are classified quantitatively.Those of rice,Wheat and cotton are divided into four,five and four classes respectively.The results provide a reliable basis for determining crop division.