CHAPTER XIV.. Drainage Adapts the Soil to Germination and Vegetation.

DRAINAGE ADAPTS THE SOIL TO GERMINATION AND VEGETATION.

Process of Germination.--Two Classes of Pores in Soils, illustrated by cuts.--Too much Water excludes Air, reduces Temperature.--How much Air the Soil Contains.--Drainage Improves the Quality of Crops.--Drainage prevents Drought.--Drained Soils hold most Water.--Allow Roots to go Deep.--Various Facts.