[ '9^ ] 



Chalkcy Soil. 



This foil wants both the argillaceous and the ftony, fandy 

 or gravelly ingredients ; therefore the beft manure for it is clayey 

 loam, or fandy loam*, but when the chalk is fo hard, as it 

 frequently is in Englind, and fo difRcultly reducible to impal- 

 pable 'powder as to keep of itfelfthe foil fufficiently open, then 

 clay is the beft manure f , as in fuch cafes the coarfe fand or 

 gravelly ingredients of loams are of no ufe. Some think, it 

 is true, that pebbles in a field ferve to preferve or communicate 

 heat ; this ufe however is not fufficiently afcertained. 



Chalhey Loam. 



The beft manure for this foil is clay, or argillaceous marie % 

 if clay cannot be had ; becaufe this foil is defedlive principally 

 in the -argillaceous ingredient : in Ireland chalkey foils or loams 

 feldom occur, but light limeftone foils frequently, and thefe do 

 not differ effentially from chalkey loams poor in argill ; clay 

 therefore, and often the foil of boggs, ftiould ferve as a manure 

 for them. 



Sandy Soils. 



The beft manure for thefe is calcareous marie §, which exadlly 

 correfponds with our theory, for thefe foils want both argillaceous 

 and the calcareous ingredients, and this marie fupplies both ; the 

 next beft is argillaceous marie, and next to thefe clay mixed 



with 



* 5 Bergman, 107. \ Young's Eaftern Tour. 



X 4th Young's Eaftern Tour, 404. J 4th Young's Eaftern Tour, 401,412. 



