John Evelyn,
Sylva; Or, A Discourse of Forest Trees…
“ What cannot a strong plow, a winter mellowing, and summer heats, incorporated with the pregnant turf, or a slight assistance of lime, loam, sand, rotten compost, discreetly mixed (as the case may require) perform even in the most unnatural and obstinate soil? And in such places where anciently woods have grown, but are now unkind to them, the fault is to be reformed by this care; and chiefly, by a sedulous extirpation of the old remainders of roots, and latent stumps, which by their mustiness, and other pernicious qualities, sowre the ground, and poyson the conception ”
