42 On Plaister of Paris. 
SE — — ———————— 
Answer. 1 began with six bushels, but gradually less-. 
ened the quantity to one; and finding the immediate effect _ 
not materially (if at all) different, now put on only one, 
and repeat it every other or third year, ‘supposing more 
produce is obtained from the same quantity in this way. 
“Query 4. What soils are the most proper for this 
manure ? _ 
Answer. Dry loams. I have tried it on wet clay with- 
out effect, though I have found its effects on the banks 
of watered meadows considerable; it does better on hilly 
than level land, perhaps because it is dry and lighter. 
Query 5. Have you repeated the application of it with 
or without ploughing ?—in what manner ?—at what 
_ Intervals, and with what effect ? 5 
Answer. | have repeated it on meadow and clover 
every other or third year with good effect, and sown it 
several times on the same land, after ploughing, without 
observing its effects to decline: in the last instance the 
land was dunged ; in the former it was not. 
Query 6. Do you find that it renders the earth sterile 
after its useful effects are gone ? 
Answer. No, quite the reverse ; nor do I believe any 
kind of manure has this effect; though hard cropping of 
land, dressed with lime, has given rise to this opinion.* 
*I was deceived in my first applications of /ime, by being told 
that /ime will spend itself as much without cropping, as with 
constant successions. I over cropped, without then knowing 
its mischief. Lime spends itseli, as it is called by exhausting 
the vegetable matter in the earth, and nothing is more inju- 
_ rious than hard cropping, with lime: bad enough with any 
manures. I mean grain crops. R. P. 
September 1810. 
* 
