xxxviii Premiums proposed by the 



a pair of horses or oxen. The second by two pair of oxen, 

 or strength equiva]ent. A Trench must be first made, with 

 the Trench Plough as deep as practicable. The Paring 

 Plough must then pare the sod off the next intended lurrow, 

 and turn it into the trench. The Trench Plough follows, 

 constantly, after the Paring Plough, This throws over a 

 body of eardi so as to bury all w^eeds, which are placed too 

 deep for vegetation, and thus, by rott ng, become manure. 

 The mould board, of the Trench Plough, should have a thin 

 plate of flexible iron (an old stone-saw the best) screwed on 

 its upper edge, vertically^ so as to extend the surface and 

 accommodate itself to the curvature of the mould board. — 

 With this auxiliary, the loose earth will be completely thrown 

 into the trench. It is otherwise liable to run over, and choak 

 the Plough. Both Ploughs (the latter the most) require bri- 

 dles, or clevasses with notches and curvated regulators, to 

 direct and fix both their depth and lateral course. Such are 

 not uncommon. The east Jersey, or low Dutch plan, is the 

 best for the Trench Plough. A Coulter is not much re- 

 quired. 



This operation should be performed in the autumn, and 

 the field lay through the winter, to attract from the air, 

 whatever is the food of plants j and to receive the benefits 

 of fre(^uent frosts and thaws. The subsequent ploughing 

 need be no deeper than usual in good tillage. If limed the 

 first spring for Indian Corn^ the better it will produce. A 

 fallov/ crop oiily should succeed the trenching the first year^ 

 and Corn admits and requires frequent stirring and exposure 

 of the soil. For the best experiment, a gold^ and for the 

 second best, a silver medal. 



3. A course on trench-ploughed ground. 



For the best and cleanest course of crops, on not less than 

 five acres of land trench-ploughed. The course may be. 1. 

 Indian corn. 2. Legumes. If beans or pease, of a species 

 least subject to the bug ; and sov>ti on the fallow of the 2d 



