scholarly journals Runoff Nutrient Transport as Affected by Land Application Method, Swine Growth Stage, and Runoff Rate

2013 ◽  
pp. 1295-1303
2013 ◽  
Author(s):  
John E Gilley ◽  
S L Bartelt-Hunt ◽  
X Li ◽  
D B Marx ◽  
D D Snow ◽  
...  

2009 ◽  
Vol 25 (6) ◽  
pp. 963-973
Author(s):  
S. B. Shah ◽  
B. K. Balla ◽  
G. L. Grabow ◽  
P. W. Westerman ◽  
D. E. Bailey

Weed Science ◽  
2001 ◽  
Vol 49 (4) ◽  
pp. 460-467 ◽  
Author(s):  
Wendy A. Pline ◽  
Andrew J. Price ◽  
John W. Wilcut ◽  
Keith L. Edmisten ◽  
Randy Wells

2017 ◽  
Vol 60 (6) ◽  
pp. 1885-1894 ◽  
Author(s):  
John E. Gilley ◽  
Shannon L. Bartelt-Hunt ◽  
Kent M. Eskridge ◽  
Xu Li ◽  
Amy M. Schmidt ◽  
...  

Abstract. The use of setback distances for manure application on cropland areas adjacent to surface water bodies could serve a function similar to vegetative filter strips. However, little information currently exists to identify the setback distances necessary to effectively reduce the transport of contaminants in runoff. The objective of this study was to determine the effects of setback distance and runoff rate on concentrations of selected constituents in runoff following land application of swine slurry to a no-till cropland area in southeast Nebraska. The study site had a residue cover of 7.73 Mg ha-1 and a slope gradient of 4.9%. The twenty plots examined during the investigation were 3.7 m across the slope by 4.9, 7.9, 11.0, 17.1, or 23.2 m long. An initial set of rainfall simulation tests were completed to identify background concentrations of selected constituents. Swine slurry was then applied to the upper 4.9 m of each plot, and additional rainfall simulation tests were conducted on the same plots examined previously. A first-order exponential decay function was used to estimate the effects of setback distance on concentrations of selected constituents. A setback distance of 12.2 m reduced runoff concentrations of dissolved phosphorus (DP), NH4-N, total nitrogen (TN), boron, chloride, manganese, potassium, sulfate, zinc, electrical conductivity (EC), and pH to background values similar to those measured for the no-slurry condition. Runoff rate significantly influenced transport of several of the constituents, with concentrations generally decreasing as runoff rate increased. The transport of selected pollutants in runoff was significantly reduced when setback areas were employed. Keywords: Filter strips, Land application, Manure management, Manure runoff, Nitrogen, Nutrients, Phosphorus, Runoff, Swine slurry, Water quality.


2008 ◽  
Author(s):  
John E Gilley ◽  
William F Sabatka ◽  
Bahman Eghball ◽  
David B Marx

Author(s):  
J. L. Brimhall ◽  
H. E. Kissinger ◽  
B. Mastel

Some information on the size and density of voids that develop in several high purity metals and alloys during irradiation with neutrons at elevated temperatures has been reported as a function of irradiation parameters. An area of particular interest is the nucleation and early growth stage of voids. It is the purpose of this paper to describe the microstructure in high purity nickel after irradiation to a very low but constant neutron exposure at three different temperatures.Annealed specimens of 99-997% pure nickel in the form of foils 75μ thick were irradiated in a capsule to a total fluence of 2.2 × 1019 n/cm2 (E > 1.0 MeV). The capsule consisted of three temperature zones maintained by heaters and monitored by thermocouples at 350, 400, and 450°C, respectively. The temperature was automatically dropped to 60°C while the reactor was down.


2016 ◽  
Vol 53 ◽  
pp. 12-15 ◽  
Author(s):  
Mitchell D. Richmond ◽  
Robert C. Pearce ◽  
William A. Bailey
Keyword(s):  

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