Horse-Hoeing husbandry: or, An essay on the principles of vegetation and tillage : Designed to introduce a new method of culture; whereby the produce of land will be increased, and the usual expence lessened. Together with accurate descriptions and cuts of the instruments employed in it. By Jethro Tull, Esq; of Shalborne in Berkshire. The third edition, very carefully corrected. To which is prefixed, a new preface by the editors, addressed to all concerned in agriculture.