EXPERIMENT STATION BULLETINS. 



193 



Below is the analysis of the fertilizing materials employed in the experiment above 

 and all succeeding fertilizer tests in this bulletin. 



Commercial Fertilizer — 



Ammonia 2.24 



Phosphoric Acid — 



Available 7.88 



Insoluble 1.04 



Total 8.93 



Potash, K 5 O 5.67 



Nitrate of Soda (95.8 per cent pure), Ammonia 19.16 



Sulphate of Ammonia 25.38 



Dissolved Phosphate Rock — 



Available 15.64 



Insoluble 83 



Total 16.47 



Muriate of Potash K 2 O 54. 77 



Sulphate of Potash K 2 O 49. %4 



THE EFFECT OF EXCESSIVE AMOUNTS OF FERTILIZING ELEMENTS 



ADDITION TO NORMAL FERTILIZERS. 



IN 



In line with the preceding experiment was another in field 12 planned to test the effect 

 of excessive amounts of each of the various fertilizing elements in comparison with 

 normal applications in the form of commercial and home mixed fertilizers. 



A standard brand of commercial fertilizers was selected and a mixture equal in 

 fertilizing value to 2.30 pounds was prepared. This required 32 pounds of nitrate 

 of soda, 2.5 pounds of muriate of potash, and 137 pounds of dissolved phosphate rock. 

 The six plots of the experiment received applications as follows: 



Plot 1.— Nothing. 



Plot 2.— 147 pounds mixture plus 24 pounds nitrate soda. 



Plot 3. — 147 pounds mixture plus 103 pounds dissolved phosphate rock. 



Plot 4. — 147 pounds mixture plus 20 pounds muriate of potash. 



Plot 5. — 105 pounds mixture. 



Plot 6. — 250 pounds commercial fertilizer. 



It will be -i'ii by the above that Plots 2. :! and 4 received but three-fourths of the 

 mixture as applied to Plot ."> : the other fourth being supplied by doubling the amount 

 of nitrogen, phosphoric acid and potash respectively. 



The yields of beets, percentage of sugar, and pounds of sugar per acre are given in 

 the table below. 





Fertilizers. 



Nothing 



Excessive Nitrogen 



Excessive Phosphoric Acid 



Excessive Potash 



Normal Home Mixture 



Commercial Fertilizer 



25 



Yield 

 per acre. 



Per cent 



sugar 

 in beets. 



Pounds. 



I6,v:>;; 



25,098 

 22,843 



21,817 | 



18,900 



17,710 



15.98 

 16.23 

 15.85 

 15.04 

 17.04 

 15.66 



Sugar 

 per acre. 



Pounds. 



2,709 

 4,083 

 3,621 

 3,412 

 3,220 

 2,77s 



