37. WATER HELD BY A COARSE AND BY A FINE SOIL 



The finer a soil is the more water it will hold. An abundance of soil water is as essential 



to the production of large crops as an abundance of plant 



food. Tillage makes a soil finer 



A LUMPY SOIL 



The soil in these lumps is useless to crops for the time being, as the root hairs feed only 



on the outside of small particles. Break up these lumps by wise tillage 



and by adding humus and so increase the " pasturage" of the crops 



