PPT-What is soil?

Soil is a mixture of Humus Sand Silt and Clay Erosion and decomposition Soil is what happens when Erosion breaks down rocks into smaller pieces From the bedrock up Decomposition occurs Living . They generally are less than 2 inches thick and are massive Crusts are created by the breakdown of structural units by flowing water or raindrops or through freezethaw action Soil crusts are generally only a temporary condition Typically the soil im The soil should be neutral or slightly acidic with pH 65 to 70 having high organic content Very light sandy soils are not recommended owing to their poor moisture holding properties Climate Light Light is one of the most important climatic factors i Qinxue Wang, National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba 305-8506, Japan, Tel: +81-29-850-2128; E mail: November 04 , 2013; January 28 Batkhishig(2014) Impact of Overgrazing texturecourtesyNASA: (Getandsample)soilhorizonsmallthesprayLetthebetweenthemoisturethroughout.OncetheStepStep(TestIf the soil: handswhenrubbedandStep themediumribbon Qinxue Wang, National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba 305-8506, Japan, Tel: +81-29-850-2128; E mail: November 04 , 2013; January 28 Batkhishig(2014) Impact of Overgrazing The delicacy of clay crystals. Soil crumb structure. Do not abuse clay!. Add plenty of organic matter. Avoid over-cultivation especially rotary cultivation. Use lime of gypsum to improve structure. Use green manure or mulch to cover the surface. The top layer of Earth’s crust where most plants grow. It contains minerals, decaying organisms, water, and air. It is divided into . horizons. , which are layers . parallel to the Earth’s surface in which . Uppermost layer of earth’s crust that supports plants, animals and microbes. Soil Forming Factors. Parent Material. Time. Climate. Vegetation & Organisms. Topography. 1. Parent Material. Refers to the rock and minerals from which the soil derives.. Objectives. Define: acidity, alkalinity, buffering capacity, soil pH. List and describe inherent factors that affect soil pH. Describe how to manage soil pH. Describe how soil pH affects soil function. . 2015 SAM FALL FORUM . . SITE ASSESSMENT AND MITIGATION PROGRAM. . October 13, 2015. s. oil test interpretation. Weston Miller, . OSU Extension Service. Preview of presentation. Safety precautions. General . soil quality assessment . How to take a soil test. What to test for. Interpreting results. 1are people on the earthMillions of species and billions of organisms151bacteria algae microscopic insects -tion of biomass anywhere on the planet Microbes which make up only one half of one percent o Soil . is the thin layer of organic and inorganic materials that covers the Earth's rocky surface. . Soil . is composed of particles of broken rock that have been altered by chemical and mechanical processes that include weathering and erosion. Soil consists of major components – . Figure 3-24. Fig. 3-24a, p. 69. Mosaic of closely packed pebbles, boulders. Weak humus-mineral mixture. Dry, brown to reddish-brown with variable accumulations of clay, calcium and carbonate, and soluble salts.