Sulphur distribution in some soil series of Nagaland

; Studies on the distribution of different fOrulS of sulphur in seven widely occurring soil series representing five great groups viz. Udorthents, Fluvaquents, Dystrochrepts, Hapludalfs and Hapludolls indicated that non sulphate-sulphur, mostly contributed to the total sulphur (86.7%) followed by organic-sulphur (10.0%) and sulphate-sulphur (3.3%). All forms of sulphur had significant positive relation with organkcarbon and negative relation with pH. Total-S maintained significant positive relationship with organic-S and nonsulphate-S. The latter two also had a significant positive correlation with each other. In general, all forms except sulphate-S decreased with depth. All forms were found to be highest in Hapludolls of valleys under virgin thick forest. However, Fluvaquents occurring on active flood plains under paddy cultivation had the lowest sulphur content. Additional keywords: Forms of sulphur, soils of Nagai and.