[ f! 3 



foil, and enrich the fame, rather impovcrifh a 

 compact foil, by carrying off thofe adventitious 

 particles it may happen to have on its furface, 

 together with thofe that defcend with them from 

 the atmofphcre. That is, land well cultivated 

 and pulverized is conftantly enriche'd and im-, 

 proved by the weather, while that which is neg- 

 lected not only receives no benefit from the 

 atmofphcre, but is liable to have what little 

 chance has beftowed upon it walhed away by ha fly 

 fhowers and heavy rain, which cannot penetrate 

 the obdurate furface* 



The conclufion then is, Firfl> That the earth 

 is deprived of certain particles necefTary to vege-» 

 tation by the growth of plants ; and to rcftore its 

 fertility, it is necefTary that fuch particles fhould 

 be reftored. Secondly ; Thofe particles may be 

 reftored either by the addition of proper manures, 

 or, in fituations where fuch manures cannot be 

 had, by a due pulverization of the foil, and ex- 

 pofing it to the influence of the atmofphere, that 

 is to fay, by fallowing. Thirdly* that arable land 

 after having borne a few crops need not remain 

 fome time fallow before it can produce the fame; 

 crops again, unlefs in circumftances where ma- 

 nure is not to be got: for whenever the earth 

 can be replenifhed tyith fuch fertilizing particles 



without 



