Colorado soils and climate have proven under irrigation Nitrate of 

 to be capable of producing a very satisfactory yield of high | od * f r 

 quality sugar-beets under normal conditions. However, the _ 

 need is being felt for some fertilizer to increase the yield 3 1 

 where farm manure is becoming scarce or not available. 



The most essential of the results as obtained each year 

 are briefly given : 



1903. 



Cow manure alone at the rate of from 1 5 up to 60 

 tons per acre, and Nitrate of Soda alone at the rate of 150 

 pounds per acre, had about the same effect, each increasing 

 the yield about four tons per acre. 



The results from the potash and phosphatic fertilizers 

 were largely negative, and Nitrogenous fertilizers, when 

 used together with the preceding, were also ineffectual in 

 increasing the yield. 



The quality of the beets was good, but poorest with 

 the larger quantity of manure ; the average sugar 14.6 

 per cent, purity 84.4. 



1904. 



The fertilizer containing Nitrate of Soda gave the 

 highest yields, except where used in " complete " fertilizer 

 with potash and phosphoric acid. 



Nitrate of Soda at the rate of 175 pounds per acre 

 seemed to be the best amount to use on this soil, increasing 

 the profit about $9.00 to $10.00 per acre over the cost of 

 application. 



There appeared to be no difference between the results 

 from applying the entire amount of Nitrate of Soda, at the 

 time of seeding, and in several applications throughout the 

 season. 



Potash seemed to increase the yield somewhat this 

 season, but only just about paid for its application. 



Refuse lime cake from the sugar factories was in- 

 effective. 



The quality of all the beets was good, the average 

 being, sugar, 15.4 per cent, purity, 87.8. 



1905. 



This season those plots with Nitrogen in the form of 

 Nitrate of Soda gave the highest yields. 



