00992naa a2200157 a 450000100080000000500110000800800410001910000200006024500950008026000090017530000160018452004960020065000090069670000170070577301120072221195612025-03-21       1987    bl uuuu     u00u1 u    #d1 aCRAVO, M. da S.  aMicronutrient fertilization on a typic acrorthox at Manaus, Brazil.h[electronic resource]  c1987  ap. 109-110.  aAnnual crops have not provided significant yield responses to micronutrient applications during the initial years of cultivation on a Typic Acrorthox at Manaus, Brazil. A field study with micronutrient fertilization was initiated in 1982 on previously cultivated land in order to gain further information on the micronutrient status of this soil. The experimental site had been cropped to a corn-cowpea rotation during the five preceding years with N, P, and K as the sole fertilizer inputs.  aSolo1 aSMYTH, T. J.  tIn: CAUDLE, N. (Ed.). Tropsoils technical report 1985-1986. Raleigh: North Carolina State University, 1987.