326 EXPERIMENT STATION KECOED. 



yield per acre for 4 different varieties of barley also grown for 19 years are as 

 follows : Mandscheuri 71.2, Oderbruck 64.6, Mensnry 60, and New Zealand Chev- 

 alier 58.3. Four varieties of winter wheat grown for 13 years yielded as 

 follows : Dawson Golden Chaff 55.4, Imperial Amber 51.2, Turkey Red 45.5, and 

 Treadwell 44.8 bu. per acre. Three varieties of spring wheat grown for 19 

 years gave the following average yields per acre: Saxonka 31 bu., Red Fife 

 30.7, and Colorado 27.9. The average yields per acre for 16 years for 3 varie- 

 ties of spring wheat were as follows : Wild Goose 38.4, Medeah 34.3, and Ontario 

 23.5 bu. Empire State, White Elephant, Rural New Yorker No. 2, and Stray 

 Beauty potatoes were grown for 19 years, and produced on an average for this 

 period 225.5, 203.6, 203.4. and 161.5 bu. per acre respectively. 



A comi)arison of the leading selected strains with the original variety of dif- 

 ferent varieties and classes of farm crops is reported. In nearly all cases the 

 selected strains gave comparatively higher yields per acre than the standard 

 varieties. Striking examples were Early Ripe oats, the standard yielding 67.7 

 bu., and the selected strain 81.6 bu. per acre; Dawson Golden Chaff winter 

 wheat, the standard yielding 49.1 bu., and the selected strain 59.5 bu. per acre, 

 and Siberian millet, the standard yielding 40.2 bu., and the selected strain 46.9 

 bu. per acre. The croi)S in these tests have been grown for 2 or 3 years. The 

 average results with different sizes of seed show that in every instance the 

 largest seed produced the largest yield of grain. In continuous selection experi- 

 ments with seed oats, it was shown that there was an average annual differ- 

 ence in favor of the heavy plump seed of 10.4 bu. the first 4 years, 15.8 bu. the 

 second 4 years, and 22.4 bu. the last 4 years, including 1903-1906. 



Sprouting of winter wheat in the field before harvesting was found to injure 

 the grain a great deal for seed purposes. The average results have shown that 

 seed with the skin unbroken had a percentage of germination of 94. seed with 

 the skin broken of 76, while considerably sprouted seed had a percentage of 

 germination of only 30, and badly sprouted seed of only 18. The results of 12 

 separate tests show an average increase in the yield of winter wheat per acre 

 of 7.8 bu. from the plump as compared with shrunken seed, and of 35.6 bu. 

 from sound as compared with broken seed. In experiments with 'spring grains, 

 shrunken and broken seed show a similar influence. 



A comparison of varieties of oats to determine their susceptibility to attacks 

 of smut shows that Early Ripe is probably entirely immune to attacks of this 

 disease. The average results for 4 years show the highest average yield of flax- 

 seed per acre was iirodnced from 2 bu. of seed per acre. 



From mixtures of oats and barley tlie best average yield for 2 years was pro- 

 duced by sowing 34 lbs. of oats and 48 lbs. of barley per acre. The best 

 combination of varieties was Mandscheuri barley with a very early variety of 

 oats, such as Alaska or Daubeney. Mandscheuri barley always gave the highest 

 percentage in the crop produced. An experiment in growing for 2 years in 

 succession 8 kinds of grain further demonstrates that Mandscheuri barley is a 

 very heavy yielder, whether sown in combination with other grains or sown by 

 ilself. All experiments made along this line point out that a combination of 

 barley and oats is the most productive mixture. While it was found that there 

 may be a decided advantage in growing different classes of cereals together, 

 growing different varieties of the same class in combination proved to be of no 

 marked benefit. 



Among 6-rowed varieties of barley Mandscheuri gave the best yields. Among 

 the 2-rowed barleys, Hanna was one of the most satisfactory, and among the 

 hulless varieties Guy Mayle ranked first. The average results for 12 jears 

 with winter barley were as follows: Weiglit per measured bushel 47.1 lbs. 

 yield of straw per acre 1.2 tons, and yield of grain per acre 54 bu. During the 



