26 



RESDLTS OF THE ADDITION OF POTASH TO 



Nitrate Niti-ate 



of Phosphoric and Phos- Average 



Nothing Soda. Acid. ph'rio»Acid. Result. 



Hard corn, bushels per acre, 6.7 2.4 1.5 12.9 5.9 



Stover, pounds " 95 665 854 582 549 



Value of net average increment, S5.50 



Financial result, 2.30 gain 



RESULTS OF THE ADDITION TO NOTHING OF 



Complete Barnyard Land 



Fertilizer. Manure. Plaster. Lime. 



Hard corn, bushels per acre, 9.9 6.8 2.5 3.5 



Stover, pounds "- 1017 250 341 -700 



Fertilizer Manure Plaster Lime 



Value of net increment due to $9.47 $5.39 $2.60 .70 

 Financial result, 2.531oss 19.61 loss 1.88gain .26 loss 



In studying the corapaiisons brought out by the first three of the 

 above tables, it becomes evident that this soil was to a large degree 

 generally exhausted. Nitrogen, phosphoric acid and potash were all 

 needed. Each when used with the two others gives a larger increase 

 than when used alone or with either one of the others. All are not 

 equally deficient, however, but in order of necessity rank : potash, 

 nitrogen and phosphoric acid. The paucity of the results due to 

 manure used as shown by the last table is very striking. With only 

 about one-tenth the nitrogen ; a little more than one-half the phos- 

 phoric acid, and one and three-fifths times the potash in " complete 

 fertilizer," we produce a much larger yield. P^specially small is the 

 increase of stover due to manure which, in view of the fact brought 

 out by the experiments of both last year and this, that potash affects 

 the growth of stem and leaf to a remarkable degree, I have no doul)t 

 was due to the deficiency of this element in both soil and manure. 



For this soil I should advise a fertilizer strong in potash and nitro- 

 gen. The increase apparently due to lime I do not regard as of much 

 significance, although since it was the same on an adjoining field last 

 year, it perhaps indicates that it will pay to use a little. 



