3 edition of An evaluation of the potential for using drainage control to reduce nitrate loss from agricultural fields to surface waters found in the catalog.
Published 1978 by Administrator in Water Resources Research Institute of the University of North Carolina
Bibliography: p. 41-42.
|Statement||Water Resources Research Institute of the University of North Carolina|
|Publishers||Water Resources Research Institute of the University of North Carolina|
|The Physical Object|
|Pagination||xvi, 136 p. :|
|Number of Pages||75|
|3||Report (Water Resources Research Institute of the University of North Carolina) ;|
nodata File Size: 4MB.
Chirst & the twelve; or, Scenes & events in the life of our Saviour & His apostles, as painted by the poets. Ed. by J. G. Holland.
The increase in crop yields are attributed to increased water availability and an associated increase in nitrogen uptake by the plants Poole et al. 3, right are often used, and individual systems, irrigating 120—500 acres, typically draw from their own well. The transformation among the inorganic forms can occur quickly and is largely controlled by soil microorganisms. Water from the DWM tile system flowed laterally to the nearby FD tile system, increasing flow and nitrate loss from the FD system.
Some of the most productive lands use drainage or irrigation, and the ability to control water regimes provides great advantages. For additional information, see the new project report. For example, higher than normal precipitation during April and May resulted in higher than normal tile flow volumes, nitrate concentrations in tile flow, and nitrate losses. Distinct seasonal patterns among the three contaminants highlights the complexity of integrated water quality assessments.
The result is increased revenue to the producer in addition to enhanced nutrient capture in the crop itself.
They will use this as a control to further evaluate how deep-chisel plowing affects surface runoff and nutrient movement in the Lower Mississippi River Valley. " Another target audience is the research community. Watershed assessment studies for the South Fork will include combined geographic analyses of soil survey, topographic, crop cover, and conservation-practices inventory data to improve our ability to assess the targeting of conservation practices towards sensitive lands.
During some monthly sampling times there were significant gas flux differences in groundwater treatment and control plots, but this did not occur every month. During this time, the water management model DRAINMOD Skaggs, 1982, 1999; Skaggs et al. Right: Flexible corrugated PVC drains allow for rapid and durable installation.
Two sub-objectives are: a Quantify extent and placement of conservation practices in the South Fork watershed and impacts of those practices on water and soil quality. In Fall 2016 and 2017, Fox brought 14-16 undergraduate students from Washington College for a field trip to the farm with Davidson's PhD student Jake Hagedorn to observe our field methods and to discuss the experimental design and our hypothesis concerning nitrate reduction and greenhouse gas production.
One oral presentation and one poster on the project were given at AGU in December 2018. Piezometers for sampling soil water 6. Preliminary conclusions We provisionally conclude that raising the groundwater level with drainage control structures effectively reduces in nitrate leaching by promoting subsoil denitrification, but causes only a modest and inconsistent increase in N2O emissions, indicating little or no pollution swapping of nitrate reduction for greenhouse gas emissions.
This also addresses other concerns with inadequate drainage, like high nitrogen losses through denitrification.
Concerns with climate change, which is resulting in greater occurrences of deficits and excesses of precipitation, will increase pressure for more irrigation and drainage.
Multiyear experiments on a wide range of soils on both farmer-operated systems and on experiment stations in North Carolina showed that CD reduced N losses to surface waters by over 40 percent and P losses by about 25 percent compared to conventional uncontrolled drainage Gilliam et al.
On undulating lands, drain lines need to account for the field hydrology where water collects in swales and other low-lying areas.
We have repurposed an Aerodyne laser from a previous research project to use in this project in order to have greater sensitivity of gradient flux measurements than could have been accomplished using the Picarro instrument as originally proposed.