Fundamentals of Soil ScienceA revised, comprehensive, introductory text covering soil science. Designed for undergraduates majoring in agriculture. Provides a balance between principles and practice, integrating all environmental topics. Covers temperate versus tropical and humid versus arid regions. Includes many photos of Asian and Canadian soils and agronomic practice. Examines tropical and northern soils, acidity in soils, and soil formation. |
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Page 132
... tion to earth - moving activities . Interdependence of Microorganisms and Animals in Organic Matter Decomposition Microorganisms and fauna work together as a team . When a leaf falls on the forest floor , both microorganisms and animals ...
... tion to earth - moving activities . Interdependence of Microorganisms and Animals in Organic Matter Decomposition Microorganisms and fauna work together as a team . When a leaf falls on the forest floor , both microorganisms and animals ...
Page 220
... tion of carbon dioxide and the accompa- nying formation of carbonic acid has an acidifying effect . When soils are alkaline , they tend to be low in iron . The produc- tion of carbon dioxide results in a reduc- tion in pH . In acid ...
... tion of carbon dioxide and the accompa- nying formation of carbonic acid has an acidifying effect . When soils are alkaline , they tend to be low in iron . The produc- tion of carbon dioxide results in a reduc- tion in pH . In acid ...
Page 376
... tion to soil conservation . Damage Done to Agricultural Land The damage done to farmlands in the United States can only be estimated roughly . Of land used for crop produc- tion , it is estimated that around 20,000,000 hectares ...
... tion to soil conservation . Damage Done to Agricultural Land The damage done to farmlands in the United States can only be estimated roughly . Of land used for crop produc- tion , it is estimated that around 20,000,000 hectares ...
Common terms and phrases
absorb accumulation acid acre agriculture Alfisols aluminum amount animals areas argillic horizon Aridisols bacteria base saturation bulk density calcium carbon cation exchange capacity centimeters color corn crease crops decomposed decomposition decreases deficiency depth drainage dry soil effect Entisols erosion factors fertilizer Figure forest grams hectare Histosols humid humus Inceptisols increase ions iron kaolinite kilograms land layer leaching lime loam magnesium manure matric potential meters microorganisms mineral moist Mollisols nitrate nitrogen nitrogen fixation nutrients occur organic matter content oxide Oxisols oxygen parent material peds percent phosphate phosphorus plant growth plow pore space potassium production reduced regions result salinity salt sand shown in Fig sloping sodium soil development soil horizon soil moisture regime soil particles soil pH Soil Sci soil solution soil surface soil temperature soil water soluble Spodosols sulfur surface soil texture tillage tion trients ture Ultisols uptake USDA vegetation Vertisols weathering wheat yields