130 



HATCH EXPERIMENT STATION. 



[Ja 



The most striking points brought out by these figures are : 

 first, the high-grade sulfate of potash fails to show the supe- 

 riority in yield to muriate which has generally been shown ; 

 second, the nitrate and carbonate of potash have given yields 

 very materially exceeding those obtained on any of the other 

 potash salts ; third, the yield on the silicate of potash is one 

 of the poorest in the field. 



Field Corn. — Average Yields i^er Acre. 



Potash Salt. 



Sound Corn 

 (Bushels). 



Soft Corn 

 (Bushels). 



Stover 

 (Pounds). 



No |>(>tash (plot8l7, 25), . 

 Kainit (iilots 18, 26), . 

 Ui,i,'h-grade sulfate (plots 19, 27), 

 Low-grade sulfate (plots 20, 28), 

 Muriate of potash (plots 21, 29), 

 Nitrate of potaeli (plots 22, 30), 

 Carbonate of potash (plots 23, 31), 

 Silicate of potash (plots 24,32), 



15.00 

 20.25 

 19.50 

 17.75 

 20.50 

 17.00 

 17.00 

 13.75 



17.78 

 14.00 

 13.45 

 14.34 

 14.44 

 13.45 

 15.78 

 18.56 



3,740 

 4,300 

 4,340 

 4,200 

 4,660 

 4,020 

 4,420 

 4,160 



The most striking point brought out by these averages is 

 the poor results where the silicate is the potash salt em- 

 ployed. Aside from this, the results with corn seem to be 

 in general accord with those which have been usually ob- 

 tained, which indicate that the different potash salts appear 

 t(^ have substantially similar effects upon this crop. 



In the case of the ensilage, as well as field corn, the sili- 

 cate of potash gives a yield much inferior to that produced 

 by the other potash salts. That the silicate, whether with 

 cabbaofes, field or ensilao-e corn in each of the five series 

 of plots where if is employed, gives yields inferior to those 

 obtained with the other potash salts, and that the y'uAd does 

 not in .some cases ecjual even the \ield obtained from the 

 no-potash plot, is a fact which it seems desirable to point 



