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to the Nature of the Earth or its Situation, if 
the Trees do not anfwer Expectation. Firft, 
therefore, I fhall begin with an Account of Clay 
Soils. 
The Nature of Clay Soils for planting Fruit - 
'Trees in . — There are Several Sorts of Clays, as 
the red, the yellow, the white, the blue, and 
the black Clays, each of which I fhall give 
feme Account of; and firft , of the red Clay. 
This, like the other Sorts, abounds with greater 
Quantity of vegetable Salts than any other 
Earth whatfoever; but it muft not be expedted 
that a Tree will grow as faft in this Soil as in 
a Loam Sand, or other loofe Earth, becaufe the 
faline Particles of Clay are fo clofely confined 
in this its ftiff Body, as very much hinders the 
emitting its fertile Salt free and quick to the 
Roots of Trees. Therefore Clays, more than 
any other Earth, requires the Help of Art to 
v affift in opening their Bodies, that they may 
give the thready Roots of Trees an eafy Admif- 
lion into them. But where Art is not made 
Ufe of for this Purpofe, the Tree muft be 
planted the higher, for keeping its Roots the 
farther from them, elfe they may be here buried 
for ever. I mean, that if a Tree is planted too 
deep in any Clay, it will never profper, becaufe 
its neceffary Shoots cannot make their Progrefs 
into this ftiff cold Earth in due Seafon. An 
Inftance of this was lately feen in my Neigh- 
bourhood, 
h 
