4. Sugar-Beet. 



Roots Sugar Leaves 



Cwts. lbs. "„ Cwts.lbs. Cwts. lbs. 



Nitrogen Phosphoric Acid Potash 331 80 17.93 59 63 259 82 



Nitrogen Phosphoric Acid 32 3 98 17.31 55 98 254 53 



Increase due to Potash 7 94 0.62 3 87 5 29 



These results go to shew that, though the sugar-beet needs a much greater 

 quantity of potash for its growth, it nevertheless makes less demand for potash 

 manuring than does the potato. The increase in yield of roots due to potash was 

 only some 8 cwts. per acre, but here again quality must be taken into consideration: 

 by the dressing of potash, the sugar content was raised by 0,62",. making a total 

 increase equivalent to an amount of 3 cwts. 87 lbs. sugar per acre. 



The Balance of Potash in the Soil. 



An average for the period shews that the annual amount of potash withdrawn 



from the soil, is in excess of that applied. 



Potash in lbs. per acre per year. 



Unmanured — 64 lbs. 



Complete artificial manuring — 27 ,, 



Dung alone — 42 „ 



Dung and complete artificial manuring .... -^ 7 „ 



From these statistics it will be observed, that from the plots dressed with complete 



artificial fertiliser, 27 lbs. more potash was taken up by the plants, than was added 



— 51 



