氮平衡指数 meaning in English

nitrogen balance index

The result indicated that , the output value per labour force , the output value of unit field area , the output value per person are the major indexes of the first principal components , the balance index of n , the output value per labour force and the pesticide quantity per unit field area are the major quotas of the second principal components , the balance index of p , the balance index of k and the output value per person are the major indexes of the third principal components
结果表明：劳均产值、单位耕地产值、人均产值是决定第一主成分的主要指标；氮平衡指数、劳均产值、单位耕地施用农药量是决定第二主成分的主要指标；磷平衡指数、钾平衡指数、人均产值是决定第三主成分的主要指标。