Region

Yield before

Yield after

Millet

Maradi

391.57 ± 202.957

1160.45 ± 595.146

Zinder

355.51 ± 430.271

741.62 ± 1283.997

t-test

t = 1.562. dl = 754. p > 0.119

t = 6.104. dl = 753. p < 0.001

Cowpea

Maradi

276.45 ± 162.593

889.87 ± 615.755

Zinder

283.14 ± 285.167

569.46 ± 523.011

t-test

t = −0.412. dl = 759. p > 0.680

t = 7.232. dl = 758. p < 0.001