00569nam a2200121Ia 4500008004100000082003000041100002400071245015400095260003600249300001400285600001900299650012900318140224s9999    xx            000 0 und d  a631.847.1:519.2(082.2) L9  aGasser, J.K.R., ed.  aModelling nitrogen from farm wastes: models and systems for studying the transformations and fate of nitrogen from animal effluents applied to soils.  aLondonbApplied Sciencecc 1979  avii,195p.  a J.K.R. Gasser  aLiquid fertilizers and manures-mathematical models,Farm Manure-mathematical models,Soil-nitrogen content-mathematical models