CLAY-Lands, those abounding with clay, whether black, blue, yellow, white, &c. of which the black and the yellow are the best for corn.

All clay soils are apt to chill the plants growing on them in moist seasons, as they retain too much water; in dry seasons, on the contrary, they turn hard and choke the plants. The natural produce of clay lands soils is goose-grass, large daisies, thistles, docks, poppies, &c. Some bear clover, and rye-grass; and, if well manured, produce the best grain: they hold manure the best of all lands; and the most proper for them are horse-dung, pigeons-dung, some kinds of marle, folding of sheep, malt-dust, ashes, chalk, lime, soot, &c.