Dec, 1909.] 



POTASH IN CLAY LOAM SOILS. 



43 



Table IV. — Yields of Hay per Acre and Percentages of Potash^ 1907. 



Plot. 



Fertilizer. 



Yield. 



Potash in Dry Matter. 



Grasses. Clover. 



11 

 12 

 13 

 14 

 25 

 26 

 27 

 35 

 36 

 87 

 38 



None 



30 lbs. actual pi)tash per A. in Muriate 



30 lbs. actual potash per A. in Sulfate 



None 



60 lbs. nitrogen per A. in Nitrate of Soda 



None 



60 lbs. nitrogen per A. in Sulfate of Ammonia 



None 



60 lbs. actual potash per A. in Muriate — 

 60 lbs. actual potash per A. in Sulfate — 

 None 



2.93 

 2.89 

 2.55 



2.40 

 1.66 

 1.49 

 1.79 

 2.02 

 2.01 

 2.56 

 2.69 



In 1908 the clover was wholly absent from the crop, which 

 was mainly timothy. .Samples were analyzed from all other 

 plats in addition to the potash and nitrogen plats. Kesults are 

 grouped — Tables V, VI, VII — to show the effects of potash alone, 

 nitrogen alone, phosphoric acid alone, and of the chemicals in 

 combination. In addition to yield and percentage of potash 

 there is given the calculated number of pounds of potash per 

 acre removed from each plat. As in the previous year, no effect 

 on yield was observed, except where nitrogen was applied in 

 liberal quantities, and no fertilizer caused any definite variation 

 in the percentage of potash found. 



Table V. — Effect of Potash on the Crop. Yield of Hay per Acre 

 and Potash Absorbed by Crop, 1008. 



Plot. 



Fertilizer. 



Yield. 



Per cent. 

 Potash. 



Potash 

 I Absorbed 



11 

 12 

 13 

 14 

 16 

 35 

 36 

 87 

 38 

 39 



None I2,8l4lb8 



30 lbs. potash per A. in .Muriate 2,016 



30 lbs. potash per \. in Sulfate 2,452 



None . 2,316 



30 lbs. potash per A. in Wood Ashes 2,678 



None 5.866 



60 lbs. potash per A. in Muriate 4,776 



60 lbs. potash per A. in .Sulfate 6,192 



None 5,320 



60 lbs. potash per A. in Wood Ashes i 5,902 



1.87 

 1.93 

 1.56 

 1.33 

 1.47 

 1.48 

 1.46 

 1.43 

 1.65 

 1.59 



62.62 

 38.91 

 38.25 

 30.80 

 39.36 

 86.81 

 69.72 

 88. ,54 

 87.78 

 93.84 



