The Biochar Amendment Improves Tomato Growth and Yield under Deficit Irrigation in Sandy Loam Soil in Senegal.

Poor agricultural soil management practices and water use optimisation in irrigation are major challenges facing crop production in Senegal. To address these problems, a factorial experiment was conducted in 2021 and 2022 to investigate the effects of biochar on tomato growth and yield in sandy loam soil under different irrigation levels. Treatments included three biochar treatments (B2 = 30 t·ha, B1 = 15 t·ha, and B0 = 0 t·ha) and three irrigation levels (full irrigation, W0 = 8 L·m·day; medium deficit irrigation, W1 = 6 L·m·day which is 75% of W0; and deficit irrigation, W2 = 4 L·m·day, 50% of W0).