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Table 1 Basic information regarding the biophysical characteristics of the surveyed zones

From: On-farm management and participatory evaluation of pigeonpea (Cajanus cajan [L.] Millspaugh) diversity across the agro-ecological zones of the Republic of Benin

Variables Guinean zone Sudano-Guinean zone Sudanian zone
Altitude (in m) 56–223 153–308 214–609
Annual rainfall (mm) 1200–1500 1100–1300 900–1100
Temperature (°C) 24–30 25–34 21–35
Seasons Bimodal rainfall regime: 2 dry seasons and 2 rainy seasons Bimodal rainfall regime: 2 dry seasons and 2 rainy seasons Unimodal rainfall regime: 1 dry season and 1 rainy season
Dominant soils Ferrallitic soils Ferruginous and ferrallitic soils Concreted or hardened ferruginous soils with small deep
Number of surveyed villages 20 19 11
Surveyed sociolinguistic groups Biali (Exotic), Somba (Exotic), Fon, Holly, Mahi, Nago, Idaasha Adja, Fon, Holly, Mahi, Nago, Yoruba Bariba, Dendi, Peuhl, Yoruba (Exotic), Boo