00516nam a2200145Ia 4500 140224s9999 xx 000 0 und d PH 620.9:631.847.1:633.002(047.3) L7 National Science Foundation Conserving energy with nitrification inhibitors(energy in agriculture) Washington DC National science foundation 1977 8p. US Department of commerce NTIS PV-277 199 Energy conservation:nitrification inhibitors: BK 0 0 0 0 KSD KSD 2014-02-24 0 PH 620.9:631.847.1:633.002(047.3) L7 6972 2014-02-24 00:00:00 2014-02-24 BK 92387 92387