T.G.C.M. van Niekerk

The effect of manure and litter handling and indoor climatic conditions on ammonia emissions from a battery cage and an aviary housing system for laying hens

P. Koerkamp, A. Keen, A. Keen, 1995 .

The effect of manure and litter handling and climate conditions on ammonia emissions from a cage system and an aviary housing system for laying hens

P.W.G. Groot Koerkamp, A. Keen, T.G.C.M. van Niekerk, 1996 .