Comp. Stephen B. Monsen. Ogden: United States Department of Agriculture; Forest Service; Intermountain Range Station, 1994. 414-416. Stevens, Allan R. and John F. Vallentine.
Falsey, 1994, Long-Term Tillage and Rotation Effects on Properties of a Central Ohio Soil: Soil Science Society of America Journal, 58: 517-522. Loomis, R.S. and D.J. Connor, 1992, Crop Ecology: Productivity and Management in Agricultural Systems: New York, Cambridge University Press, 538 p. Meek, B.D., D.L. Carter, D.T.Westermann, R.E.
National Organic Program Proposed Rule. 2 Jul. 1998. USDA. 18 Nov. 1998 <http://www.USDA.com Organic Crop Production: Soil Conservation Practices.
February 2005. 244-250. Hoag, Dana L., and Herb A. Holloway. ?Farm Production Decisions Under Cross and Conservation Compliance.? American Journal of Agricultural Economics.
Studies hav... ... middle of paper ... ... surface energy balance model. Agronomie, 22(6): 669-680. Moran, M.S., Hymer, D.C., Qi, J.G. and Kerr, Y., 2002. Comparison of ERS-2 SAR and Landsat TM imagery for monitoring agricultural crop and soil conditions.
Soil covers much of the land on Earth. Soils are used to plant trees as well as a foundation in building houses and skyscrapers. Basically, soil is defined as zone of the Earth’s crust that biologically active, which made up of minerals, organic material, water and air (Richter & Markewitz, 2010). It is very important element in the environment as it provides critical ecosystem services for life (Brady & Weil, 2008). In general, soils are classified into two major categories which are sedentary soils and transported soils.
5 December 2010 . Hoag, Chris J., et al. Riparian Wetland Information. Aberdeen: U.S. Department of Agriculture, Natural Resources Conservation Service, 2001. McCammon, Bruce, John Rector and Karl Gebhardt.
What are the factors that contribute to the suitability of a soil for agricultural purposes? To what extent can people control these factors to halt soil degradation and maintain, enha... ... middle of paper ... ..., L.R., V.W.P van Engelen, and J.H.M. Pulles. 1990. The extent of human induced soil degradation.
Agricultural engineers can work on high tech applications to grow products, water resource management and, also on alternative energies (“Agricultural Engineers” U.S. para.5). They try to house animals, comfort them, make them healthy, and even monitor productivity. They give advice on water qualities (“Agricultural Engineers” U.S. para.9). They provide water quality issues related to managing pollution controlling rivers, and using other water resources. They should be able to supervise environmental and land projects (“Agricultural Engineers” U.S. para.9).
The soil store nutrients reserves which are available as nutrients for organisms through direct uptake for plants especially and through feeding on nutrient –rich organisms e.g. animals grazing on plants The soil also provides a medium for most organisms to move through. The soil provides aeration for those organisms that require it and other soil conditions are suitable for anaerobic organisms. Through the soils regulating function organisms are provided with an environment with lessened toxicity levels. The soil is also a medium for farming and crop development which are necessary for providing nutrition and economic development to improve human livelihoods.