104 



2. Of tl>e various sorts of Rotations. 



It is not unusual, in treating of this part of the sub- 

 ject, to consider rotations as they are applicable to dif- 

 ferent soils, for instance, clay, loam, &c. ; but I think 

 it on the whole more expedient, to discuss the different 

 courses of crops, according to the number of years they 

 respectively require to finish the rotation ; some occupy- 

 ing two years, some three, some four, some five, &c. 

 Under each head it will be proper to explain, for what 

 description of soil each rotation is best calculated. 



IIJOQ years Rotation. 



In particular cases, some farmers have adopted a rota- 

 tion of two crops. A field belonging to the Honourable 

 George Abercromby, embanked from the Forth, car- 

 ried, for several years, beans and wheat alternately. 

 Upon his best loams, Mr Brown of Markle also, takes 

 wheat and beans alternately, summer-fallowing the 

 ground, when its condition requires that process. Mr 

 Fairie of Farme, near Glasgow, has adopted the same 

 system, giving a moderate dressing of dung every fourth 

 year. Dr Charles Stuart, on his farm near Edinburgh, 

 has tried a similar system on four acres and a half of 

 loam, the rotation being wheat and green crops alter- 

 nately ; but the latter were alternate potatoes and beano, 

 both drilled. In the course of fourteen years, he has 

 had, on this field, four crops of potatoes, three of beans, 

 and seven of wheat. To every green crop, putrescent 

 manure was applied ; thirty toms at least to potatoes, 

 and twenty-five to beans. The potato crops were all 

 good : The two first crops of beans were very good : The 

 third, indifferent. The crops of wheat were large, pro- 



