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-lands 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. Their natural produce is weeds, goose-grass, large daisies, thistles, docks, poppies, &c. Some clay-lands will bear clover and rye-grass; and, if well manured, will produce the best grain; they hold manure the best of all lands; and the most proper for them are horse-dung, pigeon's dung, some kinds of marl, folding of hemp, malt-dust, ashes, chalk, lime, foot, &c.