THE SOIL’ 
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soil is composed of large rock particles the more space 
we have between them for the entrance of air, heat, and 
the passage of water. The sandy soils are good exam¬ 
ples of the open porous types of soil. The clay soils 
with their fine rock particles, close together, and having 
poor drainage are known as the tight waxy soils. The 
Fig. 114b.—Plant food removed. Seven loads of cotton seed contains much 
valuable plant food. 
sandy soils are well adapted to the growing of truck 
crops, fruit, peanuts, and potatoes and the clay soils 
produce abundant yields of hay and grain. 
Heavy and Light Soils. — The terms heavy and light 
soils are not used with reference to the weight of the 
soil but to the working condition of the soil. One cubic 
foot of sand is heavier than a cubic foot of clay, but 
sandy soils are called light soils because they are easy 
to work. Clay soils are sticky, compact, and require 
more animal and man power to work them. 
