01572naa a2200265 a 450000100080000000500110000800800410001902000220006010000170008224501000009926000090019930000150020852007610022365000260098465000170101065000140102765000090104165300170105070000190106770000280108670000200111470000160113470000150115077301410116512173542021-09-21       2008    bl uuuu     u00u1 u    #d  a978-1-4020-8591-81 aPRADO, R. B.  aMapping potassium availability from limited soil profile data in Brazil.h[electronic resource]  c2008  ap. 91-101.  aBrazilian soils are generally acidic with low base saturation and low plant available potassium (K). Potassium fertilizers play important role in production costs and farmers receive no governmental subsidies. Strategies are needed to improve potassium fertilizer delivery to different regions in Brazil and to establish affordable prices and balanced potassium consumption. For such strategy, it is necessary to take into account the different soil classes with its varying K levels. The purpose of this study was to map soil K in Brazil considering the different biomes and applying techniques to reduce problems caused by limited soil profile data. A soil profile data set was constructed from the soil archives of Embrapa Soils, Rio de Janeiro, Brazil.  apotassium fertilizers  aFertilizante  aPotássio  aSolo  aSoil profile1 aBENITES, V. M.1 aMACHADO, P. L. O. de A.1 aPOLIDORO, J. C.1 aDART, R. O.1 aNAUMOV, A.  tIn: HARTEMINK, A. E.; McBRATNEY, A.; MENDONÇA-SANTOS, M. de L. (Ed.). Digital soil mapping with limited data. New York: Springer, 2008.