144 S O I L - P R O C E S S. 14. 



ihg •, the operation being too frequently defer- 

 red fo long, that the feeds of weeds, fet at liberty 

 by the harrows, have not time to vegetate, be- 

 fore they are again turned under the foil, and 

 placed out of the fphere of vegetation. 



This injudicious management is not how- 

 ever univerfal ; good farmers making a point 

 of letting their fallows lie a fufficient length of 

 time between the harrowing and the fucceed- 

 ing ftirring. 



One admirable pradtice peculiar, I believe, 

 to Norfolk, is that of making the horfes trot ac 

 harrow : it being a cuflom, which is prevalent 

 throughout almoffc every department of this 

 operation, to walk the horfes againft the rife, 

 if any, and trot them back again in the fame 

 place. ,,,T'^^^ excellent pradice not only rids 

 work and difengages the root- weeds from the 

 harrow-tines, as well as from the foil, leaving 

 them loofc on the furface ; but levels the land,- 

 in a manner which would be difficult to de- 

 fcribe, and which obfcrvaiionj alone, can render 

 evident. 



The day's work of a pair of horfes, walk- 

 ing one way and trotting the other, the har- 

 rows over-lapping fo as to give the ground at 

 full double- tine, is laid at about feven acres. 



ilJ. 



