140 



HATCH EXPERIMENT STATION. 



[Jan. 



Corn. — South Acre Soil Teat, 1903. 



Plots. 



3, 

 4, 

 5, 

 6, 

 7, 

 ^. 

 9. 

 10, 

 II, 

 1'-. 

 13, 

 14, 



Fertilizers used. 



Nitrate of ioda, . 



Dissolved boue-blafk. 



Nothing, .... 



Muriate of potash, 



Lime, 



Nothing, .... 



Manure, .... 



Nitrate of soda and dissolved 



bone-blaek. 

 Nothing, 



Nitrate of soda and muriate of 

 potash. 



Dissolved bone-black and muri- 

 ate of potash. 



Nothing, 



Plaster 



Yield pek Acre. 



Corn 

 (Bushels, 



Pounds) . 



Stover 



(Pounds) 



Nitrate of soda, dissolved bone- 

 black and muriate of potash. 



16. 



360 



360 



300 



1,880 



160 



1,200 



3,600 



SIX) 



340 



•2,'20O 



•2,3-20 



400 



400 



3,040 



Gain or Loss per 



Acre, compared 



WITH Nothing Plots. 



Corn 

 (Bushels 



90 

 Pounds). 



15.61 



— .85 



36.39 

 '2.36 



16.47 

 18.86 



..53 

 24.03 



Stover 

 (Pounds). 



—390 

 —390 



1,130 

 —590 



2,850 

 430 



1,830 

 1,9.50 



30 

 2,670 



In view of the highly unfavorable season, the development 

 of the corn was far from normal, and extended discussion 

 of the results does not seem called for. It will be noticed 

 that, as in previous years, the i)otash among the fertilizer 

 elements used is the one exercising by far the greatest effect 

 in increasing the crop. The addition of either nitrate of 

 soda or i)hosi)h()ric acid, as shown by the results on i)lots 10 

 and 11, does not very materially increase the yield produced 

 on potash alone (Plot 4). The addition of nitrate of soda 

 to the mixture of potash and dissolved bone-black used on 

 Plot 1 1 caused a considerable increase, — greater this year 

 than in previous years, as shown by the yield on Plot 14. 

 This difference in effect may very well be due to the gradual 

 exhaustion of the supply of humus in the soil on these plots, 

 which for so many years have been manured with fertili- 

 zers alone, and subjected to tillage throughout most of the 

 time. 



