Acid sulphate soil (ASS) acidification is a complex process, mainly due to the chemical and bio- chemical reactions taking place within these soils, com- monly leading to the solubility of aluminium, sulphur, iron and manganese, these being elements which in excess can severely restrict agricultural productivity in such land. This is the case with the Province of Tun- dama, Sugamuxi, located in the upper River Chicamo- cha valley, where around 3 000 ha are affected by these soils. Suitable diagnosis and control of acidity using ba- sic amendments is not often considered in these soils; when it is taken into account for establishing crops, the generalised application of different doses of lime is commonly encountered without bearing in mind the state of acidity characteristic of modal areas being rep- resentative of ASS. The present study used laboratory incubation tests for determining lime requirements in chemically equivalent CaCO 3 (EQ CaCO 3 ) terms for each SSA modal profile, representative of ASS units, cartographically delimited in a semi-detailed ASS study carried out by GISSAT. The results show that the following requirements must be born in mind when liming ASS: (1) diagnosing the condition of actual and pseudo-sulphate processes in ASS, (2) the neutralisa- tion of exchange aluminium at less than 20% and pH greater than 4,5, 3) using highly reactive corrective agents and natural or industrial liming for nutritional purposes and 4) liming reaction time must not be les than 30 days after being applied.