TY - GEN AU - Martin , John M. AU - Waldren , Richard P. AU - Stamp , David L. TI - Principles of field crop production SN - 9780130259677 U1 - 633.0973 PY - 2006/// CY - New Jersey PB - Pearson education KW - CROP PRODUCTION KW - FIELD CROPS KW - AGRICULTURE KW - SEED AND SEEDING ER -