Description details of the three farming systems encountered in the Niayes.

The statistics presented in this table correspond to 186 farms for which all data were available. Statistical tests presented in the table correspond to a comparison of the improved farming systems with the trypanotolerant one. All the production rates are annual and the figures per farm (unless specified). Bold numbers indicate significant differences,

°

p<0.1,

* p<0.05,

** p<0.01,

*** p<0.001).