Application of Fertility Capability Classification Concept in Major Soil Groups of Kamarajar District, Tamil Nadu

Twenty one soils, belonging to subgroups Typic Chromusterts, Typic Ustropepts, Udic Haplustalfs, Typic Haplusta/fs, Vertic Haplustalfs and Typic Ustorthents were grouped in 8 FCC (Fertility Capability Classification) units based on type, substrata type and condition modifiers. The FCC units will serve as the basis for conducting fertility related experiments and extrapolation of such experimental results. The condition modifiers that decide the soil and fertilizer interactions in the study are ‘d’ (dry condition), ‘b’ (basic reaction), ‘v’ (vertic characters), ‘m’ (magnesium deficiency), ‘n’ (natric), ‘k’ (potassium deficiency), ‘i’ (Fe-P fixation) and ‘e’ (low CEC).