00729cam a22002291  4500001001300000003000400013005001700017008004100034010001700075035001900092040001800111042001200129050001700141100004300158245008600201260003700287300003900324504004100363650003200404700004600436999001700482agr49000449 DLC20260227111011.0770513s1949    nyuab    b    000 0 eng    aagr49000449   a(OCoLC)2962014  aDLCcTNJdDLC  apremarc00aSB187.U6bM31 aMartin, John H.q(John Holmes),d1893-10aPrinciples of field crop productionc[by] John H. Martin [and] Warren H. Leonard.  aNew York,bMacmillan Co.,c1949.  aix, 1176 p.billus., maps.c22 cm.  a"References" at end of each chapter. 0aField cropszUnited States.1 aLeonard, Warren H.,d1900-ejoint author.  c11036d11036