AGRICULTURE Wit H CHEMISTRY. 175 



ducc abundant crops of grass, hay, and corn; which 

 articles (from the superabundance of vegetable matter 

 the infield lands contain) should be returned in the 

 state of dung to the outfield lands, for the most part as 

 deficient of vegetable matter, as the infield lands contain 

 a superabundance. 



From the example here adduced on the situation of 

 the infield lands in Scotland, as well as from fads and 

 chemical reasons, it must appear, that the alternate 

 application of dung, or vegetable composts, and saline 

 matters, to ground, is the most judicious method to pre- 

 serve the soil in a state of fertility, and to prevent too 

 great an accumulation of unprodudtive vegetable matter. 



It has, in several instances been remarked, that infield 

 land, when under pasture, and not eaten down or sufh- 

 ciently crop])ed by cattle, (as sometimes happens on such 

 grounds) or when converted into plan: ations, ceases to 

 produce the same kind of grasses or herbage it would 

 have produced if it had remained iinder pasture; and 

 this is observed in young plantations, before the effe*5t 

 produced, can be ascribed to the a<5tion of the trees in 



over- 



