A STUDY ON THE ECOLOGICAL CONDITIONS OF THE SEEDLINGS OF SEVERAL TREE SPECIES ON THE PURPLISH SOILS OF THE SICHUAN RED BASIN III.RELATION OF SOIL PHYSICAL-CHEMICAL PROPERTIES TO SEEDLING GROWTH OF THE ALDER
The fitted multivariate quadratic regression equation can better express the relation of seedling growth of the alder to physical-chemical factor of the soils. The best mathematical model indicates that the available phosphorus and pH are main factor of influence on the seedling growth. Its secondary factors are associative effect of tctal N, organic matter and CaCO3 with available molybdenum respectively. The regression equation can be applied to calculation of the seedling growth. Its regression as index ...
