Potentialities and limitations of Planosols with distinct depths of diagnostic horizon

There is a variation in the depth of subsurface horizon Planosols semi-arid region, which may influence agricultural potential and affect food production. The general aim this study was to identify potentialities limitations two as function depth. adjacent profiles P1 P2 were studied Pentecoste (Ceará, Brazil). Morphological, physical, chemical analyses done aiming at soil characterization. Soil bulk density (BD), porosity, penetration resistance (PR) analyzed completely randomized split-plot design with four replicates compare horizons Ap Btf. Btf found 62cm 18 cm P2. Indicatives water saturation more evident profile showed lower hardness higher friability, well acidity (pHH2O from 4.4 4.7) aluminum content (1.2cmolc kg-1). Both eutrophic low contents organic carbon (1.5 8.5g kg-1) phosphorus (0.9 3.9mg sodium percentage CEC 9.1% 5.5% Water retention increases compared 7.3% 2.7% P1. increase BD Btf, reaching 1.7g cm-3, while PR MPa). are common both profiles, but has physical than