EXI'l.KIM K.NTS WITH MANURES. 133 



5. If it is convenient to make plots, treat 

 these in exactly the same way, taking similar 

 precautions with regard to situation and 

 drainage, as observed in the case of the boxes. 

 The amounts given above are for boxes of the 

 size mentioned, 2 feet long by 2 feet broad, 

 that is with a surface of 4 square feet. Larger 

 or smaller boxes would require correspond- 

 ingly larger or smaller quantities of manure. 

 Similarly a bed, 8 feet long by 3 feet broad, or 

 24 square feet in surface, would require six 

 times the amounts given. The four boxes or 

 plots now stand as follow : 



A. No manure. 



B. Farmyard or pen manure ; at the rate 



of about 30 tons per acre. 



C. Nitrogen only, as sulphate of ammonia; 



about 2 cwts. per acre. 



D. Nitrogen as sulphate of ammonia ; 



about 2 cwt. per acre, together with 

 potash and phosphate. 



6. Raise in each box, or on each plot, the 

 same crop. Maize (corn), beet or cabbage are 

 recommended. The seeds may be sown in the 

 boxes themselves, and when they have germi- 

 nated an equal number of vigorous and well 

 placed seedlings kept in each b<>\ ( \irefully 

 pull up all the seedlings not wanted. If trans- 



