Bui. 53, Bureau of Plant Industry, U. S. Dept. of Agriculture. PLATE XV. 



FIQ. 1. VERY ALKALINE UNDISTURBED SAHARAN SOIL AT FOUGALA, 

 ALGERIA. YOUNG PALMS GROWING IN PITS. 



FIG. 2. DATE PALM IN DISEASED CONDITION CALLED "MEZNOON, 

 CAUSED BY EXCESS OF ALKALI, FOUGALA, ALGERIA. 



