230 EXPERIMENT STATION EECORD. [Vol.43 



alone an increase of 9.58 bu., and cottonseed meal and acid phosphate com- 

 bined an Increase of G.45 bu. Cottonseed meal and acid phosphate used alone 

 gave only small inci'eases in the yield of corn. In similar experiments with 

 cotton the manure alone more than doubled the yield. Acid phosphate gave 

 gains of over 200 lbs. of seed cotton per acre and cottonseed meal an increase 

 of 64 lbs. For Sudan grass manure ranged first, acid phosphate second, and 

 cottonseed meal third when applied in the quantities mentioned. 



Based on the results of four years' tests the varieties Schieberle, Biggs 

 Prolific, Hastings Prolific, Ferguson Yellow Dent, Fentress Strawberry, Thomas, 

 Surcropper, and Chisholm are listed as the leading varieties of corn in the 

 order of yield. The leading varieties of cotton tested in 1916-17 were Bank 

 Account, Mebane, Mortgage Lifter, Union Big Boll, Cleveland Big Boll, and 

 Hawkins with a range of an average of 633 to 522 lbs. of seed cotton per acre 

 for the two years. 



Seeding Sudan grass at five different rates ranging from 10 to 40 lbs. of 

 seed per acre did not show marked differences in the yields. A yield of 9,592 

 lbs. per acre of green material produced 3,637 lbs. of cured hay, the proportion 

 l»eing approximately 2.6 to 1. Japanese cane proved to be the best crop of 

 those tested for growing in rotation with rice. The results further indicated 

 that Japanese cane under proper drainage conditions should be planted in tlie 

 fall, and that 3 lines or about 3 tons of seed canes per acre is likely to give 

 better results than thinner rates of seeding. The best grain sorghums tested 

 were shallu, Blackbull White kafir. Pink kaflr, Schrock kafir, and feterita. The 

 production of grain by these crops was found uncertain on account of injury 

 by the sorghum midge. 



The duty of water in Cache Valley, Utah, F. S. Harris {Utah Sta. Bui. 173 

 {1920), pp. 16, figs. 9). — This bulletin reviews the results of experiments, in- 

 cluding a total of 991 tests extending over a period of 17 years, on the duty of 

 water in irrigating sugar beets, potatoes, alfalfa, corn, wheat, and oats on a 

 deep medium soil. The details of the experiments have been described previ- 

 ously (E. S. K., 27, p. 819), and some of the results with several of the crops, 

 discussed at greater length in earlier publications, are noted as follows: Corn 

 (E. S. K., 31, p. 428) ; wheat (E. S. R., 36, p. 234) ; potatoes (E. S. R., 37, p. 

 740) ; sugar beets (E. S. R., 37, p. 741) ; and oats (E. S. R., 41, p. 141). The 

 annual and average monthly precipitation for the period 1902-1919, and the 

 relation of the duty of water to yield, as indicated by the results, are shown 

 graphically. The data reported refer to the amounts of water that actually 

 soaked into the land. 



The best results with sugar beets were secured with 15 to 30 acre in. of 

 water, and it is believed that the use of more than 30 in. would probably never 

 be warranted on this type of soil. The yield of potatoes increased with the 

 duty of water up to 32^ acre in., but it dropped off rapidly when larger quanti- 

 ties were used. Alfalfa used water more advantageously than other crops in 

 the experiments and increased in yield up to 50 in., but the smaller quantities 

 were much more efficient. Fi'om 15 to 25 acre in. of water gave the best results 

 with corn. 



Among the crops under test wheat was least affected by the water applied, 

 and 15 acre in. is regarded as generally the best quantity to use, although 

 larger quantities produced slight increases in yield. Oats gave good returns 

 with the duty of water ranging from 15 to 30 acre in. The results in general 

 indicated that the proper diversification of crops makes possible the most 

 eflicient use yf irrigation water. 



