00783nam a2200229Ia 4500001001000000003000500010008004100015010001100056040000900067082001900076100001900095245018300114260008100297300001000378440001900388500003800407650003000445650001900475650001700494700002000511700002200531Para_6979CHAP220125s9999    xx            000 0 und d  a205725  cCHAP  aPA-C 631.4 B85  aPubols, Ben H.  aFerming systems and practices and their relations hip to soil conservation and farm income in the wheat region of Washington  /c by Ben H. Pubols, Alden E. Orrand Carl P. Heisig  aWashington  :b State College of Washington. Agricultural Experiment Station  a41 p.  aBulletin ; 374  aEnc. con otros impresos similares  aSuelos x conservación   aSuelos x EUA   aTrigo x EUA  aHeisig, Carl P.  aOrrand, Alden E.