What is Soil? 下基 Agronomist Forester Horticulturalist Engineer Environmentalist
Agronomist Forester Horticulturalist Engineer Environmentalist What is Soil? — continued
What is soil?continued Soil is a natural body consisting of horizontal layers of mineral and organic constituents of variable thicknesses which differ from the original material in their morphological physical, chemical, and mineralogical properties. At least some of these properties are due to soil-forming processes
What is Soil? — continued Soil is a natural body consisting of horizontal layers of mineral and organic constituents of variable thicknesses which differ from the original material in their morphological, physical, chemical, and mineralogical properties. At least some of these properties are due to soil-forming processes
What DDoes soil do? Healthy soil gives us clean air and water, bountiful crops and forests, productive rangeland, diverse wildlife, and beautiful landscapes
What Does soil do? Healthy soil gives us clean air and water, bountiful crops and forests, productive rangeland, diverse wildlife, and beautiful landscapes
Soil components The Soil Ecosystem includes biotic and abiotic Solid phase: minerals and weathered rock; fragments, organic matter, microorganism Liquid phase: water(rain, snow Gas phase: gases CO2(higher), O2(lower)
Soil components The Soil Ecosystem includes biotic and abiotic. Solid phase: minerals and weathered rock; fragments, organic matter; microorganism Liquid phase: water (rain、snow) Gas phase: gases CO2 (higher)、O2(lower)
Soil components Air 25% Mineral Water 25% Particles 45% Organic Matter 5% Organisms 10% Humus Roots 80% 10% Figure 1 Most soils contain four basic components: mineral particles, water, air, and organic matter. Organic matter can be further sub-divided into humus, roots, and living organisms. The values given above are for an average soil
Soil components Figure 1 Most soils contain four basic components: mineral particles, water, air, and organic matter. Organic matter can be further sub-divided into humus, roots, and living organisms. The values given above are for an average soil