24 BULLETIN 336, U. S. DEPARTMENT OF AGRICULTURE. 



Table VI shows that two of the three pure lines of Fultz have 

 given higher average yields for the four years than the original stock, 

 one of them exceeding the original variety by nearly 2 bushels. The 

 mixture of good pure lines has also exceeded the unselected original 

 stock in average yield by about 1 bushel. In the one year (1911) 

 when comparable yields of unselected Currell were obtained, two of 

 the selections and the mixture of pure lines exceeded the original 

 stock in yield. For the four years, the two pure lines which have 

 beeri continued exceeded the mixture of pure lines by about one-half 

 bushel. They have also exceeded the original stock, but, as previously 

 stated, these yields are not really comparable. 



From these results it appears that slight gains in yield are to be 

 obtained by the selection of pure lines, even though, as in the present 

 case, the original varieties apparently are quite pure. 



RATE-OF-SEEDING TEST. 



A test to determine the best rate of seeding for wheat was begun 

 at Arlington Farm in 1911. Three varieties, Dietz (Dietz Longberry), 

 Fultz, and Fulcaster (Acme), were sown at the rates of 4, 5, and 6 

 pecks each. In 1912 five additional varieties, Stoner, Martin Amber, 

 Missouri Bluestem, Kharkof, and Purple Straw (C. I: No. 1957), were 

 added to the test, the rates of seeding being the same as in the pre- 

 vious year. In 1913 and 1914 only four varieties, Dietz, Fultz, 

 Stoner, and Martin Amber, were included; but the rates of seeding 

 were increased to include 2, 3, 7, and 8 pecks. In 1911 and 1912 

 single twentieth-acre plats of each variety at each rate were sown. 

 In 1913 and 1914 the tests were conducted in duplicate on fortieth- 

 acre plats. The yields of grain from each variety at the different 

 rates of seeding are shown in Table VII. , 



Table VII shows that the highest yield of the Dietz wheat for the 

 four years from 1911 to 1914 was obtained from the 4-peck rate of 

 seeding and the highest yield of the Fultz from the 5-peck rate. Only 

 the 4, 5, and 6 peck rates were included in the test during all the years. 

 The Stoner and Martin Amber wheats were sown at the 4, 5, and 6 

 peck rates in the three years from 1912 to 1914. Both these varieties 

 have given slightly higher yields from the 4-peck rate than from either 

 the 5-peck or 6-peck rate. The other varieties which were grown 

 only in 1911 and 1912 vary but slightly in yield from the different 

 rates of seeding. 



The average for all varieties which have been grown at the 4, 5, and 

 6 peck rates from 1911 to 1914 shows a yield of 28.75 bushels from 

 the 4-peck rate, 27.86 bushels from the 5-peck rate, and 26.45 bushels 

 from the 6-peck rate. When the yields are shown on a strictly com- 

 parable basis by subtracting the quantity sown in each case from the 

 average yield, the advantage of the lower rate is still further increased. 

 The net average yield from the 4-peck rate is 27.75 bushels; from the 

 5-peck rate, 26.61 bushels; and from the 6-peck rate, 24.95 bushels. 



