. The principles of agriculture; a text-book for schools and rural societies . Fig. 33. The deep root-system ofred clover. Fig. 34. The shallow root-systemof orchard grass. and the plant-food which they bring from the subsoil is left,when the plant decays, in such place and condition that sur-face-rooted plants can get it. With the clover, compare agrass (Fig. 34). 171a. In many countries definite efforts are made to hold THE OFFICES OF THE PLANT 111 loose sands from drifting by winds, as along the coasts of thesea. Sand-loving plants with strong running roots or root-stocks—as various grasses
. The principles of agriculture; a text-book for schools and rural societies . Fig. 33. The deep root-system ofred clover. Fig. 34. The shallow root-systemof orchard grass. and the plant-food which they bring from the subsoil is left,when the plant decays, in such place and condition that sur-face-rooted plants can get it. With the clover, compare agrass (Fig. 34). 171a. In many countries definite efforts are made to hold THE OFFICES OF THE PLANT 111 loose sands from drifting by winds, as along the coasts of thesea. Sand-loving plants with strong running roots or root-stocks—as various grasses and sedges—are used for this pur-pose. One of the uses of windbreaks is to lessen the driftingof sands. Bluffs and railway embankments are often held fromcaving and washing by means of strong-rooted plants. 172a. Large forests probably have some influence in dis-tributing the rainfall, the precipitation tending to be greatestnear the forest areas. By some persons it is thought that thetotal precipitation is increased by forests, but this point is indispute. The off-flo
Size: 1056px × 2368px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectagriculture, bookyear
