The Power of Models and Modeling Essay -- Science Agriculture Essays

The Power of Models and stampModels have evolved since the turn of the century. There are deterrent examples for most any item or system that exists. Developments in mathematics have enabled the world of imitates to explode. Now most everything can be modeled using some sort of mathematics. Agriculture is guinea pig that must rely on predictions. The Farmers Almanac is a source of information that allows one to predict upcoming events. The data in the Almanac is mapd to model events, especially hydrologic events that can occur in the future. The models that are workd today are complex and involve numerous computations that only a computer can do. These models are used in a wide variety of tasks. Models have long been a vision to people, now they are a reality, and have been used to create systems that produce cost-efficient and effective answers to everyday problems. RESTRICTIONS ON MODELING As with life, models come with restraints. These constraints must be weight t o see the proper give and analyze ratio to ascertain a compatible model. There are numerous restraints exist among modeling. The obvious is the budget of the project. The more money available, the precision of the model increases. The use of complex mathematical relationships with multiple iterations leads to the need of vast amounts of computer time. The trade off is the computer time and cost is marginal compared the salary of an individual that is up to(p) to do these mathematical computations. Educated personnel with extensive knowledge and understanding of the model are necessary to determine if the data created makes sense. Finally a model is of no use if there is not real world data to simulate. Simulation of this data checks the validity of th... ...Drainage and Uncontrolled Drainage. Paper No.87-2548. Presented at the ASAE Intl overwinter Meeting in Illinois, December 15-18, ASAE, ST. Joseph, MI (Parsons 1987) Kuo, Wen-Ling, Tammo S. Steenhuis, Charles E. MuCul loch, Charles L. Mohler, David A. Weinstein, Stephen D. DeGloria, and Dennis P. Swaney. 1999. Effect of Grid Size on Soil Moisture for a Variable Source-Area Hydrology Model. Water Resources Research, Vol. 32, No11, 3419-3428. (Kuo 1999) Muoz-Carpena, Rafael, John E. Parsons, J. Wendell Gilliam. 1998. Modeling Hydrology and Sediment Transport in Vegetative Filter Strips. J. of Hydrology. 214, (1999) 111-129 .(Muoz-Carpena 1998) Skaggs, R. W., M. A. Breve, and J. W. Gilliam. 1995. Predicting Effects of Water Table Management of Loss of Nitrogen from Poorly Drained Soils. European diary of Agronomy, Vol 494 1-11. (Skaggs 1995).