Author: Maurice Hedert FrerePublisher:
ISBN:
Category : Agricultural chemicals
Languages : en
Pages : 60
Book Description
ACTMO, an Agricultural Chemical Transport Model
Author: Maurice Hedert FrerePublisher:
ISBN:
Category : Agricultural chemicals
Languages : en
Pages : 60
Book Description
Modeling Chemical Transport in Soils
Author: Hossein GhadiriPublisher: CRC Press
ISBN: 9780873717472
Category : Science
Languages : en
Pages : 240
Book Description
Modeling Chemical Transport in Soils: Natural and Applied Contaminants provides a comprehensive discussion of mathematical models used to anticipate and predict the consequences and fate of natural and applied chemicals. The book evaluates the strengths, weaknesses, and possibilities for application of numerous models used throughout the world. It examines the theoretical support and need for experimental calibration for each model. The book also reviews world literature to discuss such topics as the movement of sorbed chemicals by soil erosion, the movement of reactive and nonreactive chemicals in the subsurface and groundwater, and salt transport in the landscape. Modeling Chemical Transport in Soils: Natural and Applied Contaminants is an important volume for environmental scientists, agricultural engineers, regulatory personnel, farm managers, consultants, and the chemical industry.
Farming Action: Catchment Reaction
Author: J WilliamsPublisher: CSIRO PUBLISHING
ISBN: 0643105697
Category : Technology & Engineering
Languages : en
Pages : 542
Book Description
Dryland farming is a major export earner for many temperate-zone countries, yet it continues to degrade a country's natural resources. Effects are not restricted to the land - changes in water quality can reduce the potential uses of water and bring about catastrophic changes in both freshwater and coastal ecosystems. Farming Action: Catchment Reaction provides a comprehensive technical overview of the relationships between dryland farming systems and catchment land and water quality in Australia, and integrates it in a whole system framework. It deals with the issues in terms of people, pointers, processes and prediction as it discusses social aspects of developing and implementing research to improve dryland farming systems in catchment management programs, indicators of catchment health, and the processes which determine the impact of the farming action on the catchment response. It concludes by considering the adequacy of our ability to use this process knowledge in models to predict the effect of dryland farming on catchment condition.
Technical Reference Documents Supporting the Generic Environmental Impact Statement for Wastewater Management in Rural Lake Areas
Author: Publisher:
ISBN:
Category : Sewage disposal plants
Languages : en
Pages : 562
Book Description
Modeling Pesticides and Nutrients on Agricultural Lands
Author: Anthony S. Donigian (Jr.)Publisher:
ISBN:
Category : Agricultural ecology
Languages : en
Pages : 332
Book Description
Water-resources Investigations Report
Author: Advances in Soil Science
Author: Publisher: Springer Science & Business Media
ISBN: 1461389828
Category : Science
Languages : en
Pages : 378
Book Description
From the beginning of agriculture until about 1950, increased food production came almost entirely from expanding the cropland base. Since 1950, however, the yield per unit of land area for major crops has increased dramatically. Much of the increase in yields was because of increased inputs of energy. Between 1950 and 1985, the farm tractor fleet quadrupled, world irrigated area tripled, and use of fertilizer increased ninefold. Between 1950 and 1985, the total energy used in world agriculture increased 6. 9 times. Irrigation played a particularly important role in the rapid increase in food production between 1950 and 1985. The world's irrigated land in 1950 totaled 94 million hectares but increased to 140 million by 1960, to 198 million by 1970, and to 271 million hectares in 1985. However, the current rate of expansion has slowed to less than 1 % per year. The world population continues to increase and agricultural production by the year 2000 will have to be 50 to 60% greater than in 1980 to meet demands. This continued demand for food and fiber, coupled with the sharp decline in the growth rate of irrigation development, means that much of the additional agricultural production in future years must come from cultivated land that is not irrigated. Agricultural production will be expanded in the arid and semiarid regions because these regions make up vast areas in developing countries where populations are rapidly rising.
Selected Water Resources Abstracts
Author: ARS H-series
Author: United States. Agricultural Research ServicePublisher:
ISBN:
Category :
Languages : en
Pages : 60
Book Description
ARS-H.
Author: United States. Agricultural Research ServicePublisher:
ISBN:
Category :
Languages : en
Pages : 60
Book Description