354 



On increasing our Supplies of Animal Food. 



Fifth , , 25 cwt. of wheat straw. 



Sixth ,, 12 tons of clover. 



Seventh , , 25 cwt. of wheat straw. 



Eighth , , 20 tons of Swedes — 



or, in eight years, 56 tons of green food, corresponding, according 

 to our original datum, to 104 lbs. of meat per acre per annum. 



e As regards heavy land rotations of crops, we take the following 

 from Mr. Stace's Essay on that subject in the 4th vol. of the 

 Journal. It will produce probably 



First year, 12 tons of vetches and 16 tons of rape and 

 turnips. 



Second year, 25 cwt of wheat straw. 

 Third , , 12 tons of clover and tares. 

 Fourth , , 25 cwt. of wheat straw. 

 Fifth , , 25 cwt. of bean straw — 



or 40 tons of green food, i. e. about 600 lbs. of meat per acre in 

 five years, equal to nearly 1*20 lbs. per acre annually. 



f Our last instance shall be selected from Professor Low's 

 work, where it is praised for its suitability to rich clays. It may 

 yield 



First year, Nothing — summer fallow. 

 Second year, 25 cwt. of wheat straw. 

 Third , , 12 tons of clover. 

 Fourth , , 25 cwt. of oat straw. 

 Fifth , , 25 cwt. of bean straw. 

 Sixth , , 20 cwt. of barley straw. 



It thus produces 12 tons of green food in six years, or 30 lbs. of 

 meat per acre per annum. 



It is proper to remark that the above estimates are more likely 

 to be relatively than positively true ; the datum on which their 

 produce of meat is calculated is, of course, subject to the vicissi- 

 tudes which affect all agriculture, and stultify all farm estimates : 

 the herd which is to convert this food may be carried off by 

 disease, and its produce of meat will then of course be anything 

 rather than 1- 150th the weight of the food. But all the rotations 

 named are liable to this risk alike, and it may therefore be useful 

 to compare them : — 



Name. 



Period. 



Lbs. of meat 

 produced per 

 acre per ann. 



a Norfolk . 



4 years 



110 



b Ditto . . . 



5 „ 



110 



c Dunbar . 



6 „ 



80 



d . . . 



8 „ 



104 



e Stace 



5 „ 



120 



/ Low .... 



6 „ 



30 



