179 



26) during the fight against the cut worms. On October 17 the 

 Utah variety received an hour's irrigation in order to drown out 

 cut worms. No further irrigation was made until March 3-6, 

 when each plot was given a final irrigation of from two to three 

 hours' duration. 



At this time the Kansas and Arabian varieties were fertilized 

 with nitrate of soda at 750 and 800 pounds per acre respectively. 

 Since all four plots showed equal improvement, it was concluded 

 that while the irrigation was beneficial, the addition of nitrate had 

 little or no effect on the resulting crops. 



7. Harvesting. Once established, the crops were ready for 

 harvesting every thirty days for the common variety, and every 

 third week for the Arabian. 



All harvesting has been made with the ordinary hand grass 

 sickle. This method should not be used on large fields, for the 

 machine mower will do the work much more cheaply and rapidly. 

 Therefore, in considering the figures on the "cost of harvesting" 

 to follow later, the reader should not forget that the small size of 

 the experimental plots and the hand cutting have made this item 

 higher than it need be. 



8. Yields. From the first to the last cutting the yields have 

 been constantly increasing. While they were rather light at first, 

 the last cuttings made so far were as follows : 



Utah ; May 19, 1913 — 2310 lbs. green or 9.2 tons per acre green. 



Kansas; May 22, 1913 — 2076 lbs. green or 8.2 tons per acre 

 green. 



Australian ; April 28-May 1-1 — 2096 lbs. green or 8.4 tons per 

 acre green. 



Arabian ; April 28-May 1-1 — -1036 lbs. green or 4.2 tons per acre 

 green. 



Average, 7.5 tons per acre green. 



These yields might have been even better if the crops had been 

 taken at the proper time. The small herd of the College could not 

 use more than about one-sixty-fourth of an acre of fodder per 

 day, and the crops w^ere therefore left standing till ready for use. 

 Hence every bed was not cut absolutely uniformly, though an 

 effort was made to harvest the crops as uniformly as possible. 

 (To be continued. ) 



SALT AS A MANURE. 



In Soderbaums' experiments at Stockholm it was found that the 

 application of common salt to oats caused a considerable increase 

 in the yield of those cases in which nitrogen was given as nitrate 

 of soda or sulphate of ammonia, but not in the form of ammonia 



