" \" 1" ~^¥SS"WSW:'S<¥S!a 



These manurial experiments present, year by year, an interesting 

 picture. The object in view is the determination, by permanent 

 experiment, of the effect of potash manuring on the following 

 Ij lii^i crop rotation: Sugar-beet, Barley, Potatoes and Wheat. Sugar- 



beet and potatoes on the potash plots receive an annual dressing 

 at the rate of 107 lbs. potash per acre (2 cwts. 43 lbs. of 40 " .. Potash Manure 

 Salts per acre) and the wheat and barley at the rate of 71 lbs. potash per acre 

 (1 cwts. 66 lbs. 40 " ., Potash Manure Salts per acre). The effect of potash is 

 tested, on the one hand on plots never dressed with dung, and on the other hand on 

 plots where dung is applied at the rate of 8 tons per acre with beets and potatoes, 

 while barley after beets and wheat after potatoes receive no dung. Deep-box dung 

 was used, and hence dung of the best quality, with the liquid, the source of the soluble 

 potash, well preserved. It is not to be wondered, therefore, that as yet no effect due 

 to potash has evidenced itself on the plots which received dung; the soil being "Loess" 

 rich in potash and in humus, while on the plots dressed with artificials alone, potash 

 has produced each year, most marked results. The following are the average annual 



yields per acre: 



^ 1. Wheat. 



Ordin Straw 



Nitrogen -f Phosphoric acid f Potash . . 29 cwts. 60 lbs. 56 cwts. 89 lbs. 



Nitrogen ; Phosphoric acid 25 „ 68 „ 51 ,, 65 „ 



Increase due to Potash 3 cwts. 104 lbs. 5 cwts. 24 lbs. 



— 49 



