خيارات البحث
النتائج 1491 - 1500 من 61,240
Aquatic sediments [Constituents, biological activity].
1981
DePinto J.V. | Young T.C. | Martin S.C.
Bioassays [for quantifying water pollution]: procedures and results.
1981
Maciorowski A.F. | Sims J.L. | Little L.W. | Gerrard E.D.
Re-utilization of municipal wastewater sludges: metals and nitrate.
1981
Chang A.C. | Page A.L. | Bingham F.T.
Comments on the United States Environmental Protection Agency's proposal to add ammonia to the toxic pollutant list.
1981
Lee G.F. | Jones R.A.
Reclamation of wastewater with a soil-turf filter. I. Removal of nitrogen [Reuse of wastewater for irrigation].
1981
Anderson E.L. | Pepper I.L. | Kneebone W.R.
Simulation model for agricultural non-point-source pollution [Water pollution].
1981
Tubbs L.J. | Haith D.A.
Losses of nitrogen, phosphorus and potassium from agricultural watersheds of minor rivers in the Oka valley [USSR].
1981
Kudeyarov V.N. | Bashkin V.N. | Kudeyarova A.Y.
The losses of nitrogen (NH(,4), NO(,3), N(, org)), phosphorus (P(, ortho), P(, poly), P(, org)) and potassium (K('+)) from watershed areas of minor rivers, draining regions of different agricultural land use in the Oka Valley, U.S.S.R., were investigated. No N, P, and K pollution was shown in these watersheds, even though the rate of losses was found to be highly correlated with the amounts of mineral fertilizers and FYM applied. The losses were also determined by the natural soil fertility, erosion processes and soil texture under the similar level of fertilization.
اظهر المزيد [+] اقل [-]Agricultural runoff during a drought period [Dee Creek watershed, Nebraska].
1980
Schepers J.S. | Vavricka E.J. | Andersen D.R. | Wittmuss H.D. | Schuman G.E.
Analysis of non-point pollution export from small catchments [Runoff, Occoquan and Four-Mile Run basins, in northern Virginia].
1980
Griffin D.M. Jr. | Grizzard T.J. | Randall C.W. | Helsel D.R. | Hartigan J.P.
Relationship between organic loading, dissolved oxygen concentration and sludge settleability in the completely-mixed activated sludge process.
1980
Palm J.C. | Jenkins D. | Parker D.S.
