Food for NITRATE AND POTASH TEST 



Plants 



at Kentucky Experiment Station. 



18 



Bulletin 99, page 71. 



The oats in this experiment were planted April 15, 

 1899, and harvested July loth. Plot No. i was one acre 

 in area; the others were one-half acre each. 



The fertilizers were sown May 27th. The fertilizers 

 used and yields obtained, both calculated to the acre, were 

 as follows : 



^ In i8qi the New Jersey Experiment 



Station conducted some experiments with 

 potatoes on the farm of Mr. Amos Gardner, in Gloucester 

 County, N. J. The potatoes were planted in plots of one- 

 twentieth of an acre. The results are given in the following 

 table : 



Experiments with Fertilizers on Potatoes. 



^T- M 1 ■ J Yield per 



„ „ . . , Yield per plot in pounds. 



Kind of fertilizer used. Large. SmaU. Total. ^'^^^ 



1. No manure 143 57 200 33^ 



2. Bone-black (superphosphate) 16 lbs.; 



muriate of potash, 8 lbs. . . 321 51 372 124 



3. Same as above with Nitrate of Soda, 



10 lbs 562 40 602 200^ 



4. Barn-yard manure, i ton 432 65 497 1 isH 



It will be noticed that on plot 3, where Nitrate was 

 used, the yield was not only greatly increased but the per- 

 centage of small potatoes was very much less than on the 

 other plots. The addition of Nitrate' of Soda, at the rate 

 of 200 pounds per acre, to the superphosphate and potash 

 made an increase of 80 bushels of large potatoes per acre. 

 The 200 pounds of Nitrate cost about $4.75. The value 

 of 80 bushels of potatoes at 60 cents per bushel would be 

 $48.00. The profits can be easily calculated. It is also 

 worthy of note that the chemical fertilizers produced 43 

 bushels of large potatoes more per acre than 10 tons of 

 barn-vard manure. 



