-
1
-
-
84977405302
-
-
Nutrient Management Educational Initiative: Using Demonstration and Research Plots and the Penn State Nitrogen Quick Test in the Upper Conestoga RCWP. Proceedings of the 1992 National Rural Clean Water Program Symposium, U.S. Environmental Protection Agency Seminar Publication EPA/6251R‐92/006, Orlando, Florida, pp.
-
(1992)
, pp. 321-331
-
-
Anderson1
-
4
-
-
84977381031
-
-
Evaluation of Agricultural Best‐Management Practices in the Conestoga River Headwaters, Pennsylvania: Methods of Data Collection and Analysis, and Description of Study Areas. U.S. Geological Survey Open‐File Report 88–96
-
(1988)
, pp. 32
-
-
Chichester1
-
6
-
-
84977343529
-
-
Managing Farm Nutrients: Tradeoffs for Surface— and Ground‐Water Quality. Agricultural Economic Report No. 583, National Technical Information Service.
-
(1988)
-
-
Crowder, B.1
Young, C.E.2
-
10
-
-
84977347074
-
-
Occurrence of Nitrate and Herbicides in Ground Water in the Upper Conestoga River Basin, Pennsylvania. U.S. Geological Survey Water‐Resources Investigations Report 85–4202
-
(1986)
, pp. 8
-
-
Fishel, D.K.1
Lietman, P.L.2
-
11
-
-
84977409449
-
-
(Editor),. The State of the Chesapeake Bay ‐Third Biennial Monitoring Report — 1989. Data Analysis Workgroup of the Chesapeake Bay Programs' Monitoring Subcommittee
-
(1989)
, pp. 33
-
-
Fisher1
-
13
-
-
0022923521
-
Ground‐Water Recharge and Its Effects on Nitrate Concentrations Beneath a Manured Field Site in Pennsylvania
-
(1986)
Ground Water
, vol.24
, Issue.4
, pp. 483-489
-
-
Gerhart1
-
15
-
-
84977340906
-
-
(Editor),. Field Application of Manure. Commonwealth of Pennsylvania Department of Environmental Resources Document FA, Harrisburg, Pennsylvania.
-
(1986)
-
-
Graves1
-
16
-
-
84977355637
-
-
(Editor),. Manure Management for Environmental Protection. Commonwealth of Pennsylvania Department of Environmental Resources Document MM3, Harrisburg, Pennsylvania.
-
(1986)
-
-
Graves1
-
17
-
-
0026926393
-
Effects of Nutrient Management on Nitrate Levels in Ground Water Near Ephrata, Pennsylvania
-
(1992)
Ground Water
, vol.30
, Issue.5
, pp. 720-730
-
-
Hall, D.W.1
-
18
-
-
84977343897
-
-
Effects of Nutrient Management on Nitrogen Flux Through a Karst Aquifer, Conestoga River Headwaters Basin, Pennsylvania. Proceedings of the 1992 National Rural Clean Water Program Symposium, Orlando, Florida, U.S. Environmental Protection Agency Seminar Publication EPA/625/R‐92/006, pp.
-
(1992)
, pp. 115-130
-
-
Hall, D.W.1
Risser, D.W.2
-
24
-
-
84977420139
-
-
Herbicides in Surface and Ground Water of Agricultural, Carbonate Valleys, Lancaster County, Pennsylvania. Proceedings of Third National Pesticide Research Conference of the Virginia Water Resources Research Institute, Virginia Polytechnic Institute and State University, Richmond, Virginia.
-
(1991)
-
-
Lietman, P.L.1
Hall, D.W.2
-
25
-
-
84977360143
-
-
The Rural Clean Water Program. Soil and Water Conservation Society Under Project Agreement No. 68‐3A75–7–7 With the U.S. Department of Agriculture, Kensington, Maryland.
-
(1989)
-
-
Little1
-
33
-
-
2642659306
-
Manure Decomposition and Fate of Breakdown Products in Soil
-
T. L. Wilrich, G. E. Smith, (Editors)., Iowa State University Press, Ames, Iowa, pp.
-
(1970)
Agricultural Practices and Water Quality
, pp. 241-255
-
-
McCalla, T.M.1
Frederick, L.R.2
Palmer, G.L.3
-
34
-
-
84977394100
-
-
A Modular Three‐Dimensional Finite‐Difference Ground‐Water Flow Model. U.S. Geological Survey Techniques of Water Resources Investigations, Book 6, Chapter Al
-
(1988)
, pp. 586
-
-
McDonald1
Harbaugh2
-
35
-
-
84977403644
-
-
Hydrology of the Carbonate Rocks of the Lancaster 15‐Minute Quadrangle, Southeastern Pennsylvania. Pennsylvania Geological Society, 4th Ser., Bulletin W‐26
-
(1971)
, pp. 149
-
-
Meisler, H.1
Becher, A.E.2
-
40
-
-
0021578979
-
Chesapeake Bay Anoxia‐Ongin, Development, and Significance
-
(1984)
Science
, vol.223
, pp. 22-27
-
-
Officer, C.B.1
Biggs, R.B.2
Taft, J.L.3
Cronin, L.E.4
Tyler, M.A.5
Boynton, W.R.6
-
41
-
-
84977435934
-
-
Hydrogeology and Geochemistry of Folded and Faulted Rocks of the Central Appalachian Type and Related Land Use Problems. The Pennsylvania State University, College of Earth and Mineral Sciences, Circular 82, State College, Pennsylvania
-
(1971)
, pp. 181
-
-
Parizek, P.R.1
White, W.B.2
Langmuir, D.3
-
42
-
-
84977327716
-
-
Statistical Summary 1989–90 and Pennsylvania Department of Agriculture Annual Report. Harrisburg, Pennsylvania.
-
(1990)
-
-
-
43
-
-
84977417225
-
-
Pennsylvania Crop and Livestock Annual Summary. Harrisburg, Pennsylvania.
-
(1960)
-
-
-
44
-
-
84977362508
-
-
Pennsylvania Crop and Livestock Annual Summary. Harrisburg, Pennsylvania.
-
(1970)
-
-
-
45
-
-
84977337913
-
-
Pennsylvania Crop and Livestock Annual Summary. Harrisburg, Pennsylvania.
-
(1980)
-
-
-
47
-
-
84977332746
-
-
Agricultural Land‐Use Impact on Nutrients in Groundwater and Base Flow. Ground Water Conference, July 23–24, 1984, Newton, Massachusetts, pp.
-
(1984)
, pp. 377-393
-
-
Pionke, H.B.1
Urban, J.B.2
-
52
-
-
84977430274
-
-
Double‐Mass Curves. U.S. Geological Survey Water‐Supply Paper 1541‐B
-
(1960)
, pp. 66
-
-
Searcy1
Hardison2
-
56
-
-
84977395858
-
-
Soil Survey of Lancaster County, Pennsylvania
-
(1985)
, pp. 152
-
-
-
58
-
-
84933815024
-
Critique of Nitrogen Inputs and Outputs —A Valley Basin Study
-
Donald R. Nielsen, J. G. MacDonald, Academic Press, New York, New York, pp.
-
(1978)
Nitrogen in the Environment
, pp. 173-182
-
-
Viets1
|