五、土壤有机质消耗与积累的数学模式为保持与适当提高我省耕地土壤的有机质含量,每年需要投入多少有机肥到土壤中去呢?要回答这个问题,有必要了解土壤有机质消耗与积累的数学模式。国外不少学者根据长期试验资料,提出了一些数学模式。 V. Mathematical Models of Consumption and Accumulation of Soil Organic Matters To maintain and properly increase the organic matter content of cultivated soils in our province, how much organic fertilizer need to be put into the soil each year? To answer this question, it is necessary to understand the mathematics of soil organic matter consumption and accumulation mode. Many foreign scholars based on long-term test data, put forward some mathematical models.