158 AGRICULTURAL SURVEY OF chap. Vll. 



The 1 2th year the same rotation commences, 

 and goes on as before ; or, should the ground 

 appear to be sufficiently clean, pulse, potatoes, 

 or some other crop proper for wheat in succes- 

 sion, may be substituted in place of the fallow. 



The above plan is suggested as an example, 

 not as the most perfect of its kind. More com- 

 petent judges may be able to devise a course of 

 the same duration, and calculated to answer the 

 same purpose, more complete, both in point of 

 arrangement, and in respect of the particular 

 kinds of crops proper to be taken. 



This rotation recommends itself by several ob- 

 vious and important advantages, u/, It is evi- 

 dently calculated to keep the land in good or- 

 der, such a large proportion of it being applied 

 to green crops and pasture. 



2^/, It is calculated to give as much perma- 

 nency as possible to the fertility of the soil un- 

 tler the same course. It is well known that a 

 constant succession of the same crop, or of dif- 

 ferent crops of a scourging quality, will very 

 soon weaken and impoverish the soil. And it 

 is probable that the same rotation, if a short one, 

 constantly recurring, will have the same effect, 

 though not so immediately. Let the course be 

 ever so good, the ground will tire of it at last. 

 To prevent this as far as possible, the best me- 

 thod seems to be, to put it under a course which 

 will not bring the same kind of crop upon the 

 same spot for a considerable number of years ; 

 and the longer the intervening period shall be, 

 the longer will the land submit to the rotation. 

 This, however, may be carried too far. There 

 is certainly a point, beyond Which the prolon- 



