A total of two hundred and forty three of 32 weeks old Dekalb brown shell layers were allotted to nine treatments to compare the effect of sulphate compounds and DL-methionine supplementation to cassava based diets for 30 weeks duration. The treatments were : 60% maize diet and 60% cassava diets (basal control), 0.1% and 0.2% DL-methionine, 0.1% or 0.2% sodium sulphate (Na₂SO₄), 0.1% DL-methionine + 0.1% sodium sulphate, 0.2% sodium thiosulphate (Na₂S₂O₃), and 0.1% potassium sulphate (K₂SO₄) + 0.1% magnesium sulphate (Mg SO₄). Egg production was significantly better (P<0.05) in maize control group, all the DL-methionine and 0.2% sodium sulphate supplemented groups compared to groups with other sulphate supplements. Eggs were significantly heavier (P<0.05) in the maize control diet and the methionine supplemented diets than those with sulphates supplemented diets. Chickens fed maize control and methionine groups was superior in feed efficiency than all the sulphate supplemented groups (P<0.05). It is therefore recommended that 0.1% DL-methionine is the suitable supplemental level for cassava based diets.

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