Tillage

Tree species

Gliricidia sepium

Tephrosia candida

Faidherbia albida

Planting basins

1.30^a,x

1.23^a,x

1.28^b,x

Zero tillage

1.33^a,x

1.12^ab,y

1.35^a,x

Ridges

1.14^b,x

1.01^b,y

1.11^c,xy

Ploughing

0.81