No. 4.] MANUKIAL PKOBLKMS. 171 



The second five-year rotation is now identical with the 

 first in numuring and otherwise, exce})ting that the spring 

 after the Avinter rye is sown common red clover seed at the 

 rate of 7.5 pounds per acre is sown broadcast. It was 

 hoped that the practical advantage, if any, of introducing 

 into the rotation a leguminous deep-rooted plant, capable of 

 feeding from low depths and of assimilating atmospheric 

 nitrogen, might thus be thoroughly tested. The potato 

 fornuila of both of the five-year rotations was the same as 

 that used in the three-year and four-year rotations (see page 

 157). This has, however, since been changed. The Indian 

 corn formula employed in the regular course of the rotation 

 was made up as follows : — 



Pounds per Acre. 



Nitrate of soda, . . ' . . . . . 225 



Acid phosphate, . . . . . . .420 



Fine-ground steamed bone, . . . . .105 



Muriate of potash, . « . . . .120 



After the removal of the potato cro}) in each course, the 

 land is to receive in the future a quantity of air-slaked lime,* 

 Avhich will fiu"nish 6(57 pounds of actual lime (calcium 

 oxide) per acre. Fine-ground steamed bone is also applied 

 at the same time, at the rate of 360 pounds per acre. 



The rye Avas top-dressed at the outset in both rotations at 

 the rate of 120 pounds of nitrate of soda per acre, or just 

 as in the case of the other rotations Avhicli have been de- 

 scribed. The top-dressing is noAV, nevertheless, omitted. 



For several years the grass was top-dressed in both five- 

 year rotations, as follows : — 



Pounds per Acre. 



Nitrate of soda, . . . . . . .120 



Dissolved hone-black (or its equivalent of acid 

 phosphate), ....... 300 



Muriate of potash, , . . . . .120 



In both rotations the hay crops have been extremely 

 poor, — a factor which has made the rotations in some cases 

 positively unprofitaljle ; in fact, in the rotation without 



* At the beginning irregularities in amounts of lime and time of its applica- 

 tion occurred, but these have since been equalized, and the land used in these 

 rotations will receive in a period of twenty years the same amount of lime as 

 that devoted to the four-year rotation. 



