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County-Level Estimates of Nitrogen and Phosphorus from Commercial Fertilizer for the Conterminous United States, 1987-2006 : Usgs Scientific Investigat by Norman E. Spahr and Jo Ann M. Gronberg (2013, Trade Paperback)

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The U.S. Geological Surveys National Water-Quality Assessment program requires nutrient input for analysis of the national and regional assessment of water quality. Detailed information on nutrient inputs to the environment are needed to understand and address the many serious problems that arise from excess nutrients in the streams and groundwater of the Nation. This report updates estimated county-level farm and nonfarm nitrogen and phosphorus input from commercial fertilizer sales for the conterminous United States for 1987 through 2006. Estimates were calculated from the Association of American Plant Food Control Officials fertilizer sales data, Census of Agriculture fertilizer expenditures, and U.S. Census Bureau county population. A previous national approach for deriving farm and nonfarm fertilizer nutrient estimates was evaluated, and a revised method for selecting representative states to calculate national farm and nonfarm proportions was developed. A national approach was used to estimate farm and nonfarm fertilizer inputs because not all states distinguish between farm and nonfarm use, and the quality of fertilizer reporting varies from year to year. For states that distinguish between farm and nonfarm use, the spatial distribution of the ratios of nonfarm-to-total fertilizer estimates for nitrogen and phosphorus calculated using the national-based farm and nonfarm proportions were similar to the spatial distribution of the ratios generated using state-based farm and nonfarm proportions. In addition, the relative highs and lows in the temporal distribution of farm and nonfarm nitrogen and phosphorus input at the state level were maintained-the periods of high and low usage coincide between national- and state-based values. With a few exceptions, nonfarm nitrogen estimates were found to be reasonable when compared to the amounts that would result if the lawn application rates recommended by state and university agricultural agencies were used. Also, states with higher nonfarm-to-total fertilizer ratios for nitrogen and phosphorus tended to have higher urban land-use percentages.

Product Identifiers

Publisher
Creative Media Partners, LLC
ISBN-10
1288852177
ISBN-13
9781288852178
eBay Product ID (ePID)
159960351

Product Key Features

Book Title
County-Level Estimates of Nitrogen and Phosphorus from Commercial Fertilizer for the Conterminous United States, 1987-2006 : Usgs Scientific Investigat
Author
Norman E. Spahr, Jo Ann M. Gronberg
Format
Trade Paperback
Language
English
Topic
General
Publication Year
2013
Genre
Political Science
Number of Pages
34 Pages

Dimensions

Item Length
9.7in
Item Height
0.1in
Item Width
7.4in
Item Weight
2.9 Oz

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County-Level Estimates of Nitrogen and Phosphorus from Commercial Fertilizer for the Conterminous United States, 1987-2006 : Usgs Scientific Investigat by Norman E. Spahr and Jo Ann M. Gronberg (2013, Trade Paperback)

About this product

Product Information

Product Identifiers

Product Key Features

Dimensions

Best Selling in Books

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