01013naa a2200229 a 450000100080000000500110000800800410001910000230006024500940008326000090017752003300018665000140051665000280053065000190055865000180057765300220059565300220061770000230063970000200066270000190068277300820070119650922013-08-29       2013    bl uuuu     u00u1 u    #d1 aBERNARDI, A. C. C.  aPotassium fertilization in tropical soils under no-tillage system.h[electronic resource]  c2013  aPotassium (K) fertilization is one of the most common nutrient inputs used by farmers to cultivate crops on Brazil?s highly weathered, low-fertile and acidic tropical soils. Soil K is typically classified in four forms: structural (in some primary minerals), non-exchangeable (specific adsorption), exchangeable and solution.  apotassium  aFertilizante potássico  aPlantio direto  aSolo tropical  aNo Tillage System  aNo-Tillage System1 aCARVALHO, M. C. S.1 aPOLIDORO, J. C.1 aBENITES, V. M.  tElectronic International Fertilizer Correspondentgn. 34, p. 8-12, June 2013.