14 HATCH EXPERIMENT STATION. [Jan. 



divided by a line running through the middle across the 

 plats, the one end being devoted to cabbages, the other 

 to turnips. 



This acre had been for five years devoted to soil-test 

 work, the crops in order of succession having been corn, 

 potatoes, soy beans, grass and clover, and grass and 

 clover. During this time the nothing plats have received 

 no manure or fertilizer of any kind. The variety of 

 cabbages raised was Fottler's Drumhead. The seed was 

 planted in the field. The average yield of the nothing 

 plats was at the rate of 2,470 pounds of hard and 7,190 

 pounds of soft cabbages per acre. 



The average result of the application of phosphoric acid 

 was an increase at the rate per acre : hard heads, 9,557.5 

 pounds; soft heads, 1,912.5 pounds, — a profit from the 

 use of i)hosphate amounting to $23.08 per acre. The use 

 of the i)hosphate without potash, however, had practically 

 no effect upon the crop. 



The average increase apparently due to the potash is 

 at the rate per acre: hard heads, 10,147.5 pounds; while 

 there is an average decrease in soft heads at the rate of 

 527.5 pounds per acre. The net average result of the 

 use of potash is profit at the rate of $21.51 per acre. 

 The potash, even without the phosphoric acid, produces 

 a considerable increase, but produces two and one-half 

 times as great an increase in combination with a phos- 

 phate. 



The nitrogen is much less useful. The average is at the 

 rate of 2,627.5 pounds increase in hard heads and 402.5 

 pounds decrease in soft heads, })er acre. It })roduces the 

 largest increase when used with phos})hate. The net re- 

 sult of the use of nitrate of soda is a gain at the rate 

 of $6.07 per acre. 



The results are not as clear in their indications as could 

 be wished, though they point to a close dependence of this 

 crop u])ou ])oth potash and phosphoric acid manuring. The 

 experiment will be repeated when opportunity offers. 



