TY - BOOK AU - Acquaah, George TI - Principles of crop production: theory, techniques and technology SN - 0130221333 U1 - 631 21st ed. PY - 2001/// CY - New Jersey PB - Prentice Hall KW - Agriculture production KW - Crop production KW - Crop yield KW - Field crops KW - Production N1 - Index: p. 447-60 ER -