00564nam a2200193Ia 4500 170901s1961 xx 000 0 und d 631.43 K93S Kononova, M.M. Soil Organic Matter its Nature, its role in soil formation and in soil fertility 1 Oxford Pergamon Press 1961 544 Agriculture and related technologies Technology (Applied sciences) Soil physics Newman, A.C.D. Nowakowski, T.Z. ddc BK 13447 13447 0 0 ddc 0 0 RAU RAU 2017-10-18 0 631.43 K93S 4002 2017-10-18 2017-10-18 BK