【摘要】 本文利用黄淮海平原２５３个县１９８３－１９８９年农业生产的时间序列数据，采用多元回归和逐步回归方法分析了种植业产值波动与主要作物总产波动、各作物的总产波动与单产、播种面积波动在时间和空间上变化的相关关系；并进一步分析了原因和提出了稳定种植业生产的建议．更多还原

【Abstract】 ith time series data on agricultural production covering the period of 1983to 1989 for 253 counties in Huang-Huai-Hai Plain, the relationship between fluctuations of total output value of crop products, of total output of main crops,oftheir per mu yields, and of their planting areas are analyzed in time and space,using multivariate linear regression and progressive regression methods. Again,the causes responsible for the fluctuations are analyzed and the suggestions forstabilizing crop production are given.更多还原