CEREAL EXPEEIMENTS AT JUDITH BASIN SUBSTATIOIST. 



19 



time most of the effort in the nursery work has been devoted to 

 studying and increasing the selections ah-eady made rather than to 

 the making of new ones. 



At the present time nine selections are being grown in replicated 

 plats in comparison with the mass variety, the Kharkof (C. I. No. 

 1583). MilUng and baking tests are being conducted to determine 

 their value in comparison with commercial varieties. 



Date-of-Seeding Experiments. 



Date-of-seeding tests with winter wheat have been conducted for 

 six years. During the first three years, the Turkey (C. I. No. 1558) 

 was used, while during the last three years the Kharkof (C. I. No. 1583) 

 was sown. The dates included have ranged from August 1 to October 

 15. The results of these experiments have been rather variable, 

 due, no doubt, to the variations in cHmatic conditions during August 

 and September of the different years. In 1909 the earliest seeding, 

 August 1 , gave the best results. In that year there was considerable 

 winterkilling in the late-sown plats. On the average, the best 

 results have been obtained from plats sown between August 12 and 

 September 20. It may happen in some years that there is not 

 enough moisture in the soil in August and September to help germuiate 

 the wheat and give it a good start. When this condition occurs, 

 late seeding is likely to be better than early seeding. 



Table XIII gives the data that have been recorded in the date-of- 

 seeding experiment. From this table it will be seen that in the six 

 years the early September seeding (Sept. 1 to 7) has produced 

 the highest average yield. There is httle difference between the yields 

 produced from seeding at this date and from seeding either about 

 August 15 or September 15. It is probable that seeding between 

 August 10 and September 20 will give good results. Wheat seeded 

 after the later date is hkely to get a poor start in the fall and therefore 



to winterkill. 



■f 

 Table XIII. — Annual and average yields obtained in a date-of-seeding test with winter 

 wheat at the Judith Basin substation, Moccasin, Mont., during the six years from 1909 

 to 1914, inclusive. 



Date of seeding. 



Yield per acre (bushels). 



1911 



1913 



1914 



1911 to 

 1914. 



All years 

 sown. 



Aug. 1 to7... 

 Aug. 12 to 17 

 Sept. 1 to 7 . . 

 Sept. 15 to 20 



Oct.l 



Oct. 15 



60.5 

 32.0 

 24.5 

 25.2 

 

 0) 



36.0 



38.6 



36.5 



(1) 



24.0 



0) 



30.3 

 31.0 

 35.6 

 35.3 

 30.0 

 29.3 



(0 

 16.7 

 20.0 

 16.3 

 17.5 

 9.1 



28.0 

 32.5 

 46.0 

 35.0 

 26.8 

 17.3 



(') 

 28. 7 

 28.7 

 30.0 

 23.3 

 28. 8 



27.2 

 32.3 

 29.1 



24.4 

 21.1 



38.7 

 29.8 

 31.9 

 28. 3 

 20.3 

 21.1 



1 Not sown. 



