00725naa a2200157 a 450000100080000000500110000800800410001910000170006024500230007726000090010030000120010952003050012165000090042670000200043577301120045521195212025-03-21       1989    bl uuuu     u00u1 u    #d1 aSMYTH, T. J.  aNutrient dynamics.  c1989  ap. 148.  aSoil Fertility Management In Oxisols of Manaus. Procedures. An initial rice crop and three com crops were grown in annual rotations with three crops of soybean and four crops of cowpea. Results. The contributions of nutrient inputs to cumulative crop yields, during five years of continuous cropping.  aSolo1 aCRAVO, M. da S.  tIn: CAUDLE, N. (Ed.). Tropsoils technical report 1986-1987. Raleigh: North Carolina State University, 1989.