t I I/LlVATIoN. 



in sprouts from the upper parts of their root 

 from the joints of the roots. Tin-*- sprout- 

 independent plants, and continue to tiller ( 

 keeping the land supplied with a full growth \ until 

 the roots of the stools (or clumps of tiller- 

 in contact witli an uncongenial part of | 

 when the tillering ceases; the stools become extinct 

 on the death of their plants, and tin run 



out. 



The open and healthy condition of soil pro- 

 duced by draining prevents the tillering from brim: 

 stopped so long as the fertility of the soil lasts, and 

 thus keeps up a full growth of grass until the nutri- 

 ment of the soil is exhausted. 



9. Draining enables us to deysn f/- .>"/; 

 because the admission of air and the decay of i 

 (which descend much deeper in drained than in un- 

 drained land,) render the condition of the sub-oil 

 such, that it may be brought up and mixed with the 

 surface-soil, without injuring its quality. 



The second class of advantages of under-drain- 

 ing, arising in the removal of the excess of water 

 in the soil, are quite as important as those ju.- ? 

 scribed. 



10. Soils are, thereby, rendered ear 



because the water, which rendered them cold, hca\ \. 

 and untillable, is earlier removed, leaving them ear- 

 lier in a growing condition. 



11. The throwing out of (jra'm in n->nt<r is le> 

 sened, because the water falling on the earth is im- 

 mediately removed instead of remaining to throw up 



9 



