definition of, 23.
formation of, 30, 237.
material composing, 147, 26.
mulch, 56.
temperature, 57, 60.
testing, 162, 215.
texture, 37, 142.
texture important, 142, 143.
ventilation, 68, 142.
warmed by sun, 58.
warmed by conduction, 58.
water, 40, 151.

Soils, 5, 23.
adobe, 30.
alfalfa, 29.
and the farmer, 5.
attitude of toward water, 40.
cabbage, 28, 161.
canteloupe, 28, 161.
capacity for film water, 51.
cauliflower, 28.
classified, 26.
clay, 29.
cloddy, 38.
close, 38.
coarse, 38.
compact, 38.
corn, 28, 29, 30, 161.
cotton, 28, 29, 161.