Fig. 2
Total chlorophyll and proline contents (A), relative water content, and leaf water potential (B) of Senegalia senegal, Vachellia seyal, and Prosopis juliflora seedlings grown on non-sterile sandy soil amended with four doses of peanut shells (0, 4, 6, and 8 t ha−1) during for 4 months under greenhouse. For each species, bars sharing the same letter comparing peanut shells doses are not significantly different at p < 0.05 (Student-Newman-Keuls test)