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The Migration and Distribution of Tritium Water in Chinese Cabbage(Brassica chinensis)-Soil Ecosystem Forecasting Methods of Pulping Properties of Fast-Growing Woods with Multiple Nonlinear Regression Prediction Model of Nut Yields for Korean Pine Plantation DYNAMICS OF TRANSFERENCE AND DISTRIBUTION OF ~(95)Zr IN THE TEA-SOIL ECOSYSTEM Variable-Exponent Taper Models for Dahurian Larch in Different Regions of Daxing‘anling