An essay on the improvement to be made in the cultivation of small farms : by the introduction of green crops, and housefeeding the stock thereon : originally published in an address to the small farmers on the estates of the Earl of Gosford and Colonel Close, in the county of Armagh : with a preface, addressed to landlords, giving full information to those who may be inclined to adopt the plan recommended, as to the best mode of introducing it, and the results attending its introduction, together with the expenses likely to be incurred thereby / by William Blacker.