Soil science & management

摘要: The Importance of Soil, Soil Origin and Development, Physical Properties Water, Water Conservation, Drainage Irrigation, Life in the Organic Matter, Fertility, pH Salinity, Plant Nutrition, Sampling Testing, Fertilizers, Amendments, Tillage Cropping Systems, Horticultural Uses Classification Survey, Urban Government Agencies Programs, Appendix I Some Basic Chemistry, II Sedimentation Test Texture, III Orders United States, IV Horizon Symbol Suffixes, V Land Evaluation, VI Preferred Characteristics for Selected Trees, Glossary, Index