Chap. V. Of Tillage. 39 



the Parts being brought nearer together, becomes, 

 for a time, Bulk for Bulk, heavier 5 i. e. The fame 

 Quantity will be contained in lefs Room, and fo is 

 made to partake of the Nature and Benefits of ftrong 

 Land, viz. to keep out too much Heat and Cold, 

 and the like. 



But ftrong Land, being naturally lefs porous, is 

 made for a Time lighter (as well as richer) by a good 

 Divifion -, the Separation of its Parts makes it more 

 porous, and cauies it to take up more Room than it 

 does in its natural State ; and then it partakes of all 

 the Benefits of lighter Land. 



When ftrong Land is plow'd, and not fufrlciently, 

 fo that the Parts remain grofs, 'tis faid to be rough, 

 and it has not the Benefit of Tillage - 9 becaufe mod 

 of the artificial Pores (or Interftices) are too large •, 

 and then it partakes of the Inconveniences of the 

 hollow Land untill'd. 



For when the light Land is plow'd but once, 

 that is not fufficient to diminifh its natural Hollow- 

 nefs (or Pores •,) and, for Want of more Tillage, the 

 Parts into which 'tis divided by that once (or perhaps 

 twice) Plowing, remain too large -, and confequently 

 the artificial Pores are large alfo, and, in that refpecl, 

 are like the ill-tilPd ftrong Land. 



Light-land, having naturally lefs internal Superfi- 

 cies, feems to require the more Tillage ( d) or Dung 



to 



(d) As for puffy Land, which naturally fwells up, inftead of 

 fubfiding, tho' its Hoilownefs is much abated by Tillage, yet it 

 ,is thought little better than barren Land, and unprofitable for 

 Corn : But what we ufually call Light-land, is only comparatively 

 fo, in RefpecTt of that which is heavier and itronger. And this 

 Sort of Light land becomes much lighter by being ill-tilFu; the 

 unbroken Pieces of Turf underneath undifTolved, forming large 

 Cavities, increafe its Hoilownefs, and confequently its Lightnefs : 

 I have often known this Sort of Land defpis'd by its Owners, 

 who fcar'd to give it due Tillage, which they thought would 

 make it fo light, that the Wind would blow it away; but when- 

 ever fuch has bsen thoroughly till'd, it never fail'd to become 



D 4 much 



