细化搜索
结果 1-4 的 4
Nitrate leaching in dairy farming: economic effects of environmental restrictions
1998
Groeneveld, R. | Bouwman, A.F. | Kruitwagen, S. | Ierland, E.C. van (Department of Economics and Management, Environmental Economics Group, Wageningen Agricultural University, P.O. Box 8130, 6700 EW, Wageningen (Netherlands))
Mitigation of nitrous oxide emission from dairy farming systems
1998
Velthof, G.L. | Beusichem, M.L. van | Oenema, O. (Nutrient Management Institute NMI, Wageningen Agricultural University, P.O. Box 8005, 6700 EC Wageningen (Netherlands))
Environmental performance indicators for nitrogen
1998
Hanegraaf, M.C. (Centre for Agriculture and Environment, P.O. Box 10015, 3505 AA Utrecht (Netherlands))
Environmental impacts of different nitrogen inputs on dairy farms and implications for the Resource Management Act of New Zealand
1998
Ledgard, S.F. | Crush, J.R. | Penno, J.W. (AgResearch, Ruakura Research Centre, Private Bag 3123, Hamilton (New Zealand))
