Concentrations, loads, and yields of select constituents from major tributaries of the Mississippi and Missouri Rivers in Iowa, water years 2004-2008 /

Water-quality assessment of the eastern Iowa basins : nitrogen, phosphorous, suspended sediment, and organic carbon in surface water, 1996-98 /
Published: (2001)

Nutrient concentrations, loads, and yields in the Middle Iowa River Basin, Iowa /
by: Garrett, Jessica D., et al.
Published: (2021)

Summary analysis of the North American (US portion) OECD eutrophication project : nutrient loading - lake response relationships and trophic state indices /
by: Rast, Walter
Published: (1978)

Impact of nitrogen additions on algal growth in Iowa streams /
by: Bushong, Steven J.
Published: (1987)

Estimation of anthropogenic nitrogen and phosphorus inputs to the land surface of the conterminous United States--1992,1997, and 2002 /
by: Sprague, Lori A., et al.
Published: (2013)

Terrestrial contribution of N to stream water in managed and undisturbed forested watersheds.
by: Gosz, James R.
Published: (1976)

Pollution in runoff from nonpoint sources /
by: Campbell, Kenneth L., 1943-
Published: (1978)

A local net volume equation for Iowa /
by: Hahn, Jerold T.
Published: (1976)

Effects of livestock enterprises on the economics of soil and water conservation practices in Iowa /
Published: (1983)

Nitrate removal from water at the water-mud interface in wetlands /
Published: (1976)

Ground water and soil nitrate one year after cultivation in Hailstone Basin near Rapelje, Montana /
by: Custer, Stephan G.
Published: (1971)

The economics of soil and water conservation practices in Iowa : results and discussion /
by: Pope, C. Arden
Published: (1983)

Nitrogen and phosphorus concentrations and fluxes of streams in the Mississippi Embayment Study Unit, 1996-98 /
by: Coupe, Richard H. (Richard Henry), 1954-
Published: (2002)

Phosphorus and nitrogen concentrations and loads at Illinois River south of Siloam Springs, Arkansas, 1997-1999 /
by: Green, W. Reed
Published: (2001)

Iowa's remarkable soils : the story of our most vital resource and how we can save it /
by: Woida, Kathleen
Published: (2021)

Low flow nutrient loss in the mid-Trinity River ; [runoff-related pollutant loadings in the mid-Trinity River] : prepared under contract no. PG 75-36 for the Texas Water Quality Board, Austin, Texas by the Planning and Environmental Management Division of the Trinity River Authority of Texas.
Published: (1978)

Nonpoint source -- stream nutrient level relationships : a nationwide study /
by: Omernik, James M.
Published: (1977)

Optimal operation of large agricultural watersheds with water quality constraints /
by: Williams, Jimmy Ray
Published: (1978)

The use of continuous water-quality time-series data to compute nutrient loadings for selected Iowa streams, 2008-17 /
by: Garrett, Jessica D.
Published: (2019)

Estimation of total nitrogen and total phosphorus in streams of the middle Columbia River Basin (Oregon, Washington, and Idaho) using SPARROW models, with emphasis on the Yakima River Basin, Washington /
by: Johnson, Henry M., et al.
Published: (2013)

Water-quality and biological assessment of the Iowa River and tributaries within and contiguous to the Meskwaki Settlement of the Sac and Fox Tribe of the Mississippi in Iowa, 2006-07 /
by: Littin, G. R.
Published: (2009)

The dilution/flushing technique in lake restoration /
by: Welch, E. B. (Eugene B.)
Published: (1981)

Nutrients in ground water and surface water of the United States : an analysis of data through 1992.
Published: (1995)

Phosphorus and nitrogen concentrations and loads at Illinois River south of Siloam Springs, Arkansas, 1997-1999 /
by: Green, W. Reed
Published: (2001)

Managing nitrogen in crop production /
by: Scharf, Peter C. (Peter Clifton), 1959-
Published: (2015)

Concentrations and loads of nitrogen and phosphorus in the Yazoo River, northwestern Mississippi, 1996-97 /
by: Coupe, Richard H. (Richard Henry), 1954-
Published: (1998)

Simultaneous flow of water and heat in water unsaturated Iowa soils during evaporation : completion report /
by: Kirkham, Don, 1908-
Published: (1971)

Trends in nutrient concentration and load for streams in the Mississippi River Basin, 1974-94.
by: Lurry, Dee L.
Published: (1997)

The economics of soil and water conservation practices in Iowa : model and data documentation /
by: Pope, C. Arden
Published: (1982)

Trends in nutrient concentration and load for streams in the Mississippi River Basin, 1974-94 /
by: Lurry, Dee L., et al.
Published: (1997)

Advances in nitrogen cycling in agricultural ecosystems : proceedings of the Symposium on advances in nitrogen cycling in agricultural ecosystems held in Brisbane, Australia, 11-15th May 1987 /
Published: (1988)

Estimation of nitric and nitrous nitrogen in soils /
by: Fraps, G. S. (George Stronach), 1876-
Published: (1931)

Nitrogen in agricultural systems /
Published: (2008)

Assessing total nitrogen in surface-water samples : precision and bias of analytical and computational methods /
by: Rus, David L.
Published: (2012)

Evaluation of nitrogen application technique and tillage system on nitrogen runoff from an erodible soil /
by: Lembi, Carole A.
Published: (1985)

Immobilization and mineralization of nitrogen in pasture soil /
by: Huntjens, J. L. M.
Published: (1972)