Fig. 4From: Ash fall impact on vegetation: a remote sensing approach of the Oldoinyo Lengai 2007–08 eruptionExample of the polynomial relationship between the average bi-monthly NDVI and the 48 days antecedent rainfall for herbaceous vegetation between 1500 and 2100 m a.s.l. The 48 days antecedent rainfall provided the best statistical relationshipBack to article page