caa a22 4500 388054255 CHVBK 20180307125101.0 cr unu---uuuuu 161130e199809 xx s 000 0 eng 10.1017/S0889189300007773 doi S0889189300007773 pii (NATIONALLICENCE)cambridge-10.1017/S0889189300007773 Impact of agricultural management on nitrate concentrations in drainage waters [Elektronische Daten] Nitrate contamination of surface water resulting from inputs of agricultural drainage water is a widespread problem. To learn whether alternative agricultural practices might ameliorate this problem, we measured NO-3 in water draining from three neighboring fields from 1970 to 1992. Drainage water from two fields fertilized with N exclusively as composted and liquid manure had NO-3 concentrations less than 2 ppm (20% of the Public Health Service recommended limit for drinking water). When these fields were converted to a corn/soybean rotation fertilized with anhydrous ammonia, NO-3 concentration increased about 7- to 10-fold. On a third field, corn was always fertilized with anhydrous ammonia. Changing this field from a rotation of corn, oats and hay to corn/soybean and increasing the rate of N fertilization by about 18% almost doubled the NO-3 concentration in the drainage water. The corn/soybean rotation most prevalent in the Corn Belt today resulted in high NO-3 concentrations in the drainage water, while the alternative system prevented NO-3 problems. Copyright © Cambridge University Press 1998 nitrate pollution nationallicence composted manure nationallicence mineral N fertilization nationallicence crop rotation nationallicence Goldstein Walter A. Research Director, Michael Fields Agricultural Institute, W2493 County Road ES, East Troy, WI 53120 Scully Michael J. Retired farmer, 1420 Wiggins, Springfield, IL 62704 Kohl Daniel H. Professor, Department of Biology, Washington University, St. Louis, MO 63130 Shearer Georgia Research Professor, Emerita, Department of Biology, Washington University, St. Louis, MO 63130. American Journal of Alternative Agriculture Cambridge University Press 13/3(1998-09), 105-110 0889-1893 13:3<105 1998 13 AJA https://doi.org/10.1017/S0889189300007773 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1017/S0889189300007773 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Goldstein Walter A. Research Director, Michael Fields Agricultural Institute, W2493 County Road ES, East Troy, WI 53120 NATIONALLICENCE 700 1- Scully Michael J. Retired farmer, 1420 Wiggins, Springfield, IL 62704 NATIONALLICENCE 700 1- Kohl Daniel H. Professor, Department of Biology, Washington University, St. Louis, MO 63130 NATIONALLICENCE 700 1- Shearer Georgia Research Professor, Emerita, Department of Biology, Washington University, St. Louis, MO 63130 NATIONALLICENCE 773 0- American Journal of Alternative Agriculture Cambridge University Press 13/3(1998-09), 105-110 0889-1893 13:3<105 1998 13 AJA CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge