00525nam a2200157 a 450000100080000000500110000800800410001910000190006024501060007926000740018530000100025965000240026965000390029365000210033265000140035310364742019-11-05       1987    bl uuuu  m   00u1 u    #d1 aBAETHGEN, W.E.  aOptimizing soil and fertilizer nitrogen use by intensively managed soft red winter wheatbtesis Ph.D.  aBlacksburg: Virginia Polytechnic Institute and State Universityc1987  a114p.  aABONOS NITROGENADOS  aABSORCION DE SUSTANCIAS NUTRITIVAS  aMANEJO DEL SUELO  aNITROGENO