36 On Plaister of Paris. 
Query 5. Have you repeated the application of it 
with or without ploughing ?—in what. manner ?—at 
what intervals ?—and with what effect ? | ; 
Answer. Uhave repeated it the seventh year after three 
crops of clover, one of wheat, one of corn, and one of 
oats, with which clover was sown. The effect nearly 
the same as at first. I have this spring repeated two 
bushels per acre on the same ground, without plough- 
ing, on clover which had been mowed two successive 
years, but my expectation was not answered. 
N. B. This ground, has been twice manurediwith 
barn yard dung; once with corn, and once on the grass, 
since the plaister was first applied. ! 
Query 6. Do you find that it renders the earth sterile 
after its useful effects are gone ? 
Answer. On the contrary, the lands on which I have 
first used the plaister, though then in the state mention- 
ed in answer to the 2 Query, have since regularly yield- 
ed excellent crops of grass, grain, potatoes, corn &e. part 
of which never has had any other manure, at least for 
twelve years. 
Query 7. To what preducts can it be best applied? 
—grain, and what kinds ?—grasses, and what kinds? 
Answer. Thave found considerable advantage ‘from 
the plaister sown with oats in very small quantity, 7. ¢. 
as much as would adhere to the wet seed. Applied to 
corn in the same way, it has an admirable effect ; indeed 
with me, equal to three or four times the quantity sown 
on the corn after it comes up. 
I have sown it with barley and clover, at the rate of 
three bushels per acre at different times. The clover 
was always very fine, but I cannot say that the barley 
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