00738cam a22002291  45000010008000000030008000080050017000160080041000330100017000740350019000910400027001100420012001370500017001490820015001661000043001812450083002242600039003073000042003465040041003886500033004297000046004627419523BD-DhUL20150115141329.0770513s1949    nyuab    b    000 0 eng    aagr49000449   a(OCoLC)2962014  aDLCcTNJdDLCdBD-DhUL  apremarc00aSB187.U6bM3  a631.5bMAP1 aMartin, John H.q(John Holmes),d1893-10aPrinciples of field crop production /cJohn H. Martin [and] Warren H. Leonard.  aNew York :bMacmillan Co.,cc1949.  aix, 1176 p. :billus., maps ;c22 cm.  a"References" at end of each chapter. 0aField crops.zUnited States.1 aLeonard, Warren H.,d1900-ejoint author.