OF ROTATION OF CROPS. 329 



dung can be obtained in abundance, this rotation is the 

 most productive of any, in so far as regards the potatoe 

 and wheat crops ; but the clover often fails, unless the land 

 is ploughed deep, and kept clean. Where clover fails, and 

 dung abounds, it might be advisable to raise alternate crops 

 of potatoes and wheat. 



We shall now proceed to state rotations of four crops cal- 

 culated for clayey soils. 



In thin clays, a four-course shift is recommended, as, 

 1. Fallow; 2. Bear, or Barley; 3. Clover j and, 4. Oats; 

 because such soils become worse the longer they remain in 

 grass. It is thought, however, by many respectable farm- 

 ers, that the clover should be pastured, not only for one, 

 but for two years, and that the rotation should be extended 

 to five years. 



On the estate of Monorgan, in the Carse of Gowrie, 

 the following rotation was adopted on a fine friable dry 

 clay, and has been for many years followed with much 

 success: 1. Fallow; 2. Wheat; 3. Drilled beans; and, 4. 

 Wheat. 



A farmer, who has taken about 300 acres in that dis- 

 trict, at the rent of about L. 6, 10s. per Scotch acre, pro- 

 poses to adopt the following course : 1. Beans ; 2. Wheat; 

 3. Clover; 4. Wheat. 



This rotation, however, is strongly objected to from a 

 number of respectable quarters. It is said, that clover never 

 answers after beans and wheat, and that wheat after clover, 

 is very precarious on the best of soils, and cannot there- 

 fore be depended upon during a long lease, as a source of 

 profit. The crops of beans and clover cannot afford that 

 rent; and no allowance is made for summer-fallow, though 

 the practice cannot be dispensed with in the Carse of 

 Gowrie. The idea of having one-fourth of a farm under 

 beans, as a preparation for wheat, in so moist and change- 



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