CEREAL INVESTIGATIONS AT THE NEPHI SUBSTATION. 



37 



winter survival was then determined by dividing the number of 

 plants growing by the number of seeds planted. 



The number of plants maturing was determined also. This 

 number seldom differed from the number of plants surviving. 

 Occasionally, however, a weak plant would fail to mature. For this 

 reason it was necessary to make the second count. If the second 

 count were not made, the possibility of error would be enhanced 

 when the average number of heads to the plant was being determined. 



Harvesting was 



done by hand. The 

 heads of each row 

 were picked and 

 placed in a paper 

 bag. Later, in the 

 laboratory, the aver- 

 age length in inches 

 of the heads of all 

 the plants in each 

 row was determined. 

 No differences less 

 than a quarter of an 

 inch were noted in 

 making head meas- 

 urements . The 

 heads were then 

 thrashed by means 

 of a small hand 

 thrasher made espe- 

 cially for small row 

 work. In this man- 

 ner the row yields 

 were obtained with 

 reasonable accu- 

 racy. 



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Fig. 9.— Plat arrangement for testing different sizes of seed of two 

 varieties of winter wheat, at six different rates of seeding. 



SPRING WHEAT VARIETIES. 



The test of the value of the different sizes of seed of spring wheat, 

 as stated before, was conducted during only one season, in 1909. Two 

 varieties were used, one durum, Kubanka (C. I. No. 1440), and one 

 common, Spring Ghirka (C. I. No. 1517). The durum variety, 

 Kubanka, has light-brown or yellowish chaff and beards and large, 

 hard, clear-amber kernels. The common variety, Spring Ghirka, 

 is beardless, and it has a white chaff and medium-sized, hard, red 

 kernels. Some difficulty was experienced in obtaining the desired 



