000 00296 a2200121 4500
082 _a631.4
_bTOD
090 _c24090
_d39144
245 _aTo day's need to increase production
300 _a31p.
_c21cm
650 _aSoil science
650 _aSpecific techniques apparatus equipment
942 _cL
999 _c51244
_d51244