TY - BOOK AU - Acquaah,George TI - Principles of crop production: theory, techniques, and technology SN - 0131145568 U1 - Cir. 631 A27 PY - 2005/// CY - Upper Saddle River, N.J. PB - Pearson Prentice Hall KW - Field crops KW - Food crops KW - Crop yields N1 - Includes bibliographical references and index ER -