Applied Nitrogen Losses in Relation to Oxygen Status of Soils

Meek, B. D.; Grass, L. B.; MacKenzie, A. J.

doi:10.2136/sssaj1969.03615995003300040027x

Cited by 36 publications

(7 citation statements)

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“…collections. Decreasing nitrate wii.h increasing depth had been documented in saturated lower profiles by Meek et al (1969Meek et al ( , 1970. Bicarbonate increased (cu = 0.01) with depth, presumably because of increased COz partial pressures (Boynton and Compton, 1944;McCall and Cole, 196S).…”

Section: Lysimeter Resultsmentioning

confidence: 93%

Nutrient loss from disturbed forest watersheds in Oregon's coast range

Miller¹,

Newton²

1983

Agro-Ecosystems

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Dissolved nutrients were monitored bi-weekly in stream water draining 14 upland watetzhcds in Oregon's Coast Range after sprayin g with 2,4:5-T + 2,4-D, clrarcut harvesting and slash burning. Anion generation and leaching were primarily studied. The nitrate concentrations fell and the bicarbonate concentrations rose during summer low-flows from treated watersheds without detectable increases in loss of macronutrients (N, Ca, Mg, K, Na). The stream water concentrations of bicarbonate (the most prevalent anion) related to watershed orientation and the degree of devegetation. Nitrate concentrations appeared to be correlated positively with watershed drainage rates. Studies with incubated soils and field sampling of soil solution indicate that denitrlfication probably minimizes nitrate loss from saturated soils during frequent winter to spring s&m periods.

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Section: Lysimeter Resultsmentioning

confidence: 93%

Nutrient loss from disturbed forest watersheds in Oregon's coast range

Miller¹,

Newton²

1983

Agro-Ecosystems

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“…Reducing nitrate concentrations in drainage waters may be possible by enhancing denitrification (Burford and Bremner 1975;Davenport et al 1975;Meek et al 1969), and watertable management in the southeastern U.S. has shown potential for reducing nitrate concentrations in subsurface drainage water (Gilliam 1987;Gilliam and Skaggs 1986;Gilliam et al 1979;Skaggs and Gilliam 1981). These studies clearly establish a precedent for reducing contamination through manipulating biological functions via water-table management.…”

Section: Research Needsmentioning

confidence: 99%

Drainage and Water Quality in Great Lakes and Cornbelt States

Fausey¹,

Brown

Belcher

et al. 1995

J. Irrig. Drain Eng.

125

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The soils and the climate of the Great Lakes and Cornbelt states dictate that drainage is required to carry out economically viable farming activities. When drained, the soils are very productive and this eight-state region accounts for nearly 80% of the agricultural production of the United States. Drainage played an important role in the development of the region and a historical perspective is included to indicate the impetus for drainage and the amount of drainage application. Research results of agricultural drainage effects on water quality indicate that agricultural subsurface drainage has both positive and negative impacts; i.e., reduction in sediment and phosphorous, and increase in nitrate-nitrogen delivery to receiving waters. Research is needed to evaluate the full potential of controlled drainage and water-table management systems for managing agricultural effects on water quality. This information is needed by state and federal agencies to help landowners meet existing and impending water-quality requirements. Drainage is an important management practice for improving water quality while sustaining agricultural viability. RightsWorks produced by employees of the U.S. Government as part of their official duties are not copyrighted within the U.S. The content of this document is not copyrighted. ABSTRACT: The soils and the climate of the Great Lakes and Combelt states dictate that drainage is required to carry out economically viable farming activities. When drained, the soils are very productive and this eightstate region accounts for nearly 80% of the agricultural production of the United States. Drainage played an important role in the development of the region and a historical perspective is included to indicate the impetus for drainage and the amount of drainage application. Research results of agricultural drainage effects on water quality indicate that agricultural subsurface drainage has both positive and negative impacts; i.e., reduction in sediment and phosphorous, and increase in nitrate-nitrogen delivery to receiving waters. Research is needed to evaluate the full potential of controlled drainage and water-table management systems for managing agricultural effects on water quality. This information is needed by state and federal agencies to help landowners meet existing and impending water-quality requirements. Drainage is an important management practice for improving water quality while sustaining agricultural viability. HISTORY AND NEED

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“…Most measurements of N leaching losses are indirect, involving analysis of ground-water from catchment areas (McColl et at. 1975) or periodic samplings of soil cores for chemical analysis to trace the movement of N03-N and ammonium-N (NH4-N) (Cunningham & Cooke 1958;Meek et at. 1969;Ludecke & Tham 1971;Risk 1976).…”

Section: Introductionmentioning

confidence: 99%