Soil Resources and Human Adaptation in Forest and Agricultural Ecosystems in Humid Asia

Relationship to Mineral Weathering Conditions ................................ 79 4.5 Factors Controlling Potentially Mineralizable and Recalcitrant Soil

Organic Matter in Humid Asia ....................................................................... 81 4.5.1 Soils Studied ....................................................................................... 82 4.5.2 Soil Properties and a Comparison of Land Use ................................. 83 4.5.3 Amounts of PMC and PMN and the Rate Constants for the

Different Land-Use Systems ...............................................................84 4.5.4 Estimation of PMC and PMN by Stepwise Linear Regression

Using the Five Identi…ed Factors by Principal Component Analysis ... 84 4.5.5 Estimation of PMC and PMN by Stepwise Linear Regression

Using Soil Properties Representing the Five Identi…ed Factors .........86 4.5.6 Factors Controlling ROC and RON ....................................................87