Abstract

Surface and sub surface soil samples pertaining to 7, 9 and 4 soil sub groups in Tirunelveli, Tuticorin and Kanyakumari districts respectively were studied during July-September 1994 for the assessment of fertility level and the preparation of the soil fertility capability classification. The main condition modifiers selected were 'e', 'k'. 'b', 's'. 'h'. 'n' and 'g' for Tirunelveli district and 'e', 'k', 'b', 's'. 'v', 'h'. 'g' and 'n' for Tuticorin district and 'h', 'e', 'g', 'b' and "k" for Kanyakumari district. All the soils of three districts are low in available nitrogen and hence in addition to the above modifiers, the low available N status was also considered to be the local modifier.

Keywords: Fertility capability classification, problem soils, soil fertility.