PPT-Properties of the Different Kinds of Soil

by Moira Whitehouse PhD Remember physical properties are the things we can observe about a substance using our five senses For soil the two main physical properties are color and texture Texture. 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 texturecourtesyNASA: (Getandsample)soilhorizonsmallthesprayLetthebetweenthemoisturethroughout.OncetheStepStep(TestIf the soil: handswhenrubbedandStep themediumribbon The different kinds From wwwprimaryresourcescouk/english/ . . . AddingConnectives Adding Definitions. Soil Texture. The way a soil feels. A name given a textural group based on the relative proportions of each size of soil particle. Definitions. Aggregate. Mass or cluster of soil particles such as a clod, crumb or granule. Russell Yost, Ph.D.. Department of Tropical Plant and Soil Science. University of Hawai`i at . Manoa. Particle size determination in Soils of the Tropics. Some weathered soils of the tropics – those containing large amounts of hydrous . by Moira Whitehouse PhD. Remember physical properties are the things we can observe about a substance using our five senses.. For soil, the two main physical properties are color and texture.. Texture. 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. By the end of this section you will be able..... To name and explain the causes of soil erosion.. Describe in detail how human activities can cause soil erosion.. Name and explain the primary methods of soil conservation.. Are they different? and . Do they matter?. Susan Andrews, National Leader. Soil Quality and Ecosystems. National Soil Survey Center. August 9. , . 2012. Soil Quality Definitions. “fitness for use”. 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.. Skye Wills. NCSS, 2011. Soil and Ecosystem Change. Soil Change Guide. Document change in soil function applicable over the entire extent of a soil series or component phase. When possible, Ecological Sites and associated State and Transition Models inform study design and interpretation. After reading this module, you should be able to. . U. nderstand . how weathering and erosion occur and how they contribute . to element . cycling and soil formation.. E. xplain . how soil forms and describe its characteristics.. 1. . . INTRODUCTION. Civil and environmental engineering includes the conception, analysis, design, construction, operation, and maintenance of a diversity of structures, facilities, and systems. All are built on, in, or with soil or rock. The properties and behavior of these materials have major influences on the success, economy, and safety of the work. Pages 144-149. CHALK TALK . HUMUS. If you look at soil with a hand lens, you will find small pieces of rock, minerals and . humus. . Living Things. You might not see them, but soil is made up of water, air, and .