Dryland Farming and Livestock as Sources of Nitrate in Ground Water PDF Download
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Author: Joanna N. Thamke
Publisher:
ISBN:
Category : Dry farming
Languages : en
Pages : 4
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Book Description
Author: Joanna N. Thamke
Publisher:
ISBN:
Category : Dry farming
Languages : en
Pages : 4
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Book Description
Author: Larry W. Canter
Publisher: Routledge
ISBN: 1351428667
Category : Technology & Engineering
Languages : en
Pages : 288
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Book Description
This time-saving book provides extensive coverage of all important aspects of nitrates in groundwater, ranging from prevention to problem assessment to remediation. It begins by highlighting the nitrogen cycle and related health concerns, providing both background information and a unique perspective on health issues. It then analyzes subsurface pr
Author: William J. Andrews
Publisher:
ISBN:
Category : Dairy farms
Languages : en
Pages : 76
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Book Description
Author:
Publisher:
ISBN:
Category : Geological mapping
Languages : en
Pages : 618
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Book Description
Author: Mark F. Becker
Publisher:
ISBN:
Category : Feedlots
Languages : en
Pages : 92
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Book Description
Author: Marian P. Berndt
Publisher:
ISBN:
Category : Groundwater
Languages : en
Pages : 44
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Book Description
Author: David A. Nimick
Publisher:
ISBN:
Category : Agricultural chemicals
Languages : en
Pages : 60
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Book Description
Author: Ronald F Follett
Publisher: Elsevier
ISBN: 0444599398
Category : Technology & Engineering
Languages : en
Pages : 412
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Book Description
Supplying crops with adequate nitrogen is vital to ensuring food supplies. Once nitrogen is added to the soil, it is subject to chemical transformations of the nitrogen-cycle including transformation to nitrate. Excessive amounts of accumulated nitrate may then leach out of the soil and could potentially enter and contaminate drinking water supplies. The purpose of this book is to examine the subject of nitrogen management and ground water protection. The issue of maintaining ground water quality is addressed primarily from an agronomic point of view. Topics covered include: health and economic aspects of nitrate in drinking water; nitrate sources; ground water nitrate in the USA and other developed countries; transport, leaching and accounting for nitrogen; soil, nitrogen, crop and water management; and nitrate in aquifer systems. The book contains a keyword index and is organized into thirteen chapters, each with appropriate references, tables and figures. Chapter authors are among the leading experts on the subject of nitrate and ground water quality. Readers to whom the book is directed include soil scientists and agronomists, agricultural engineers (irrigation and drainage), environmental scientists, agricultural policy makers, and hydrologists.
Author: Eloise Kendy
Publisher:
ISBN:
Category : Groundwater
Languages : en
Pages : 78
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Book Description
Author: Christine Ross Miller
Publisher:
ISBN:
Category : Drinking water
Languages : en
Pages : 200
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Book Description
Selection of agricultural management practices to reduce nitrate leaching from soils can only be successful if both nitrate loading rates from soils to shallow aquifers and groundwater residence times are quantified. Elevated nitrate concentrations in shallow unconfined aquifers are commonly observed in agricultural areas as a result of increased N inputs. In the Judith River Watershed (JRW) in central Montana, USA, notably high nitrate concentrations in groundwater and stream water have exceeded the U.S. EPA drinking water standard of 10 mg L -1 for at least two decades. This large (24,400 ha) watershed drains immediately into the Missouri River, a tributary of the Mississippi River. Over an eleven month period in 2012, we measured groundwater and surface water nitrate concentrations across a hydrologically isolated strath terrace. We use the resulting data to constrain nitrate accumulation dynamics in the shallow aquifer. Nitrate is relatively conservative in this location, as it is high in groundwater (17.57 +/- 4.29 mg L -1; all groundwater samples pooled together), and remains high in streams and springs that drain the landform (15.67 +/- 9.45 mg L -1; all surface water and spring samples pooled together). We use a numerical model to simulate the character of nitrate accumulation in the aquifer as a whole, in order to evaluate how the entire period of cultivation has contributed to current nitrate concentrations, and begin to predict response times for effects of land use change. We consider the effect of groundwater residence time and travel time on nitrate loading using particle tracking in a three dimensional model aquifer. We find no correlation with nitrate concentrations in groundwater and emerging surface waters, and suggest approaches for improving both the geometry of the model and the selection of sites in future work. Overall, our results imply that groundwater residence times are several decades at most, suggesting that similar timeframes will be needed to reduce overall nitrate concentrations in groundwater and emergent streams to below drinking water standards. Preliminary evaluation of several management scenarios suggests that both increased fertilizer use efficiency and rotational strategies may be needed to prevent the loss of soil N to groundwater.
