CLASMnCATION OP MANURES. 91 



plants get at once the fuJl benefit r J" all the fertilizing 

 matter that has been depositetl. 



In many parts of this countr\, irrigated meadows 

 and pastures might be formed, which would produce 

 hea\-y grass for hay early in the season, and then by 

 occasional flowing furnish rich and abundant pasture 

 during the hot and dry weather of summer, in the 

 neighborhood of cities and large towns, it is sometimes 

 practicable to irrigate with water from the sewers and 

 drains; this is one of the richest of manures. In the 

 vicinity of Edinburgh, Scotland, a poor sandy tract 

 has by such means been converted into a perfect 

 garden, which rents at an enormous sum, and furnishes 

 ■noocflBive crops of grass from early spring to late 

 ■utuiniL 



iXCTION III. CLASS1F1CATIO.N OF MAMUKSS. OF TEOETABLX 

 MANTTRKS. 



We will now return to the classification of manures. 

 They may be divided into three great classes, T«ge- 

 tablu, animal and inineral. These we will coBsider in 

 the order al> all that has bses said 



■s to its elh ; necessary aow to give 



any elaborate dt i > to the praokn tmiim of 



the word nutn»ir> img is a manure that gives 



food to plants, either directly or indirectly. 



Vegetable manures are numerous and important; 

 ■one of them have been already mentioned, when 

 treating of tV rhing in of jjreen on>p». They 



are not so t-' m th«Mr a<ti«>ij as olhrr nianur«i 



yet ' ' ■ ,s 



of !■ :. . i. 



Clover IS one ot ' > 



purpose, more lai., 



buckwheat, ry»'. rapr, ui 



turnipd sown thick, iiidian 141111 x. .wn < ^ 



