Abstract
The research evaluated the salinity status and variation patterns of soils along Tuttudawa Main Canal of the Wurno Irrigation Scheme after the September 2020 flood. The scheme is located in the Sudan Savannah, about 45 km north of Sokoto town (latitude 13°20′N and longitude 4°55′E). Wurno irrigation scheme comprises of a storage reservoir with design capacity of 19,501,200 m³ supplied from Goronyo dam. The reservoir is linked to two main canals, namely; Lugu main canal that passes through Lugu village and Tutudawa main canal that passes through Tutudawa village, a main drain and a number of secondary canals. Four transects at 50 m intervals were purposively selected, and soil samples were collected at two depths (0–15 cm and 15–30 cm). Parameters analyzed included pH, total N, organic carbon, available P, CEC, and exchangeable bases, while EC, ESP, and SAR were calculated. Results showed high levels of Ca²⁺, K⁺, and Na⁺ across all sampling points and depths. pH and EC values indicated soils within the saline range, posing risks for crop production. Sustainable soil amendments and controlled irrigation are recommended to maintain favorable soil conditions for plant growth.