CEKEAL EXPEEIMENTS AT THE AKRON FIELD STATIOX. 



17 



duced. These are Crimean (C. I. No. 1559) and Malakof (C. I. No. 

 2908). In tlie six years they have been grown these two varieties 

 have given higher average yields than any of the others. Ghirka 

 Wmter (C. I. No. 1438) and Crimean (C. I. No. 1436) have tied for 

 third place in the 6-year period. 



In Table X agronomic data are given for five varieties which have 

 been grown durmg the 8-year period. These data include average 

 dates of heading and ripening, height, weight per bushel, and yield of 

 grain. There is very slight difference shown in the average dates of 

 heading and ripenmg, but there is a difference in the average length of 

 straw, Ghirka Winter (C. I. No. 1438) having an average height of 39 

 inches and Crimean (C. I. No. 1436) an average height of 32 inches. 

 The difference in weight per bushel is slight. 



Table X. — Average dates of heading and ripening, height, weight per bushel, and yield per 

 acre of five leading varieties of winter wheat grown at the Akron Field Station, Akron, 

 Colo., during the 8-year period, 1908 to 1915, inclusive. 



Variety. 



C.I. 



No. 



Average date — 



Headed. 



Ripe. 



Height. 



Weight 



per 

 bushel. 



Yield 

 per 

 acre. 



Crimean 



Kharkof 



Ghirka Winter 



Turkey 



Kharkof 



1436 

 1583 

 1438 

 1571 

 1442 



June 18 

 June 17 

 June 18 

 June 17 

 ...do 



July 13 



Jvily 14 



July 16 



July 15 



July 14 



Inches. 

 32 

 35 

 39 

 35 

 35 



Pounds. 

 58.4 

 58.3 

 68.8 

 58.2 

 58.3 



Bushels. 

 22.0 

 21.6 

 21.5 

 20.6 

 20.4 



NURSERY EXPERIMENTS. 



The cereal nursery has made possible the testing of a large number 

 of varieties and strains. Sixty-three varieties have been tested in 

 nm'sery rows, most of which have not shown sufficient promise to 

 waiTant advancing them to field tests. A much larger number of 

 pure-Une selections have been tested in the nursery and most of them 

 discarded. One of the strains has been increased and is worthy of 

 mention. It is a selection of Kliarkof (C. I. No. 1442) and has been 

 designated Kharkof 6P4 (C. I. No. 4207). 



Nursery sowings have suffered from soil blowing to such an extent 

 that the results are not entirely comparable. In 1914 several rows 

 were almost entirely killed. Soil blowing follows as a consequence 

 of the special soil preparation necessary in order to sow by hand or 

 with garden tools. In order to prevent soil blowing it is necessary 

 to have an uneven and, if possible, a lumpy surface. 



RATE-OF-SEEDING EXPERIMENTS. 



Ratc-of-seeding tests of Kharkof winter wheat have been conducted 

 at Akr-on for five years. During that time four rates of seeding have 

 been used each year. The seed has been sown on summer-fallowed 

 50400°— Bull. 402—16 3 



