01239nam a2200325 a 450000100080000000500110000800800410001910000920006024500780015226000170023030000090024749000310025652004140028765000090070165000130071065000150072365000130073865000100075165000160076165000130077765000150079065000090080565300080081465300170082265300180083965300150085765300210087265300120089365300080090514490532005-05-11       1974    bl uuuu      00u1 u    #d1 aUNIVERSITY OF DELAWARE. Cooperative Extension Service. Agricultural Experiment Station.  a1974 Delaware research and field tests with no-tillage corn and soybeans.  aNewarkc1974  a61p.  a(Cooperative Bulletin, 5).  aEvaluation of mulch, nitrogen sources and tillage systems for field corn production; Corn borer studies, Georgetown substation, 1974; Nutsedge control in no-tillage corn; Evaluation of corn hybrids under no-tillage; No-tillage planter accessory evaluation; No-tillage demonstration; Optimum corn production systems; Effect of planting date on soybean varieties following small grains; Soybean tillage systems.  acorn  anitrogen  ano-tillage  aresearch  aMilho  aNitrogênio  aPesquisa  aProdução  aSoja  aEUA  aFertilizacao  aFertilization  aProduction  aSemeadura direta  aSoybean  aUSA