01007cam a22002897a 4500 20220817043109.0 971010s1987 r 00010 d 65560 66532 74824 631.422 S6 Soil Science Society of America. Madison, Wis. 108304 Soil fertility and organic matter as critical components of production systems Madison, Wis : The Society, 1987 166 p. ; gráfs. SSSA Special publication ; 19 BATCH-UPD 10 20130110 UCH01 1057 BATCH-UPD 10 20130410 UCH01 0651 BATCH-UPD 10 20130914 UCH01 1626 CONVERSION 10 20130109 UCH01 1336 Humus. 56902 Suelos Fertilidad. 110367 Suelos Materia orgánica. 110429 SSSA Special publication ; 19 BK 631.422 S6 S LIBRO -7724 LIBRO 3838 74824 i 75.00 65560 65560