226 EXPERIMENT STATION" KECORD. [Vol.41 



similarly treated. These results are held to indicate that newly broken forest 

 land should first be seeded to clover or clover and timothy. Crop yields on the 

 substation were as follows: Clover hay 2.5 tons (2 cuttings), Japanese and 

 Silver-hull buckwheat 24.8 and 13.2 bu., respectively, Russett, Early Ohio, and 

 Rural New Yorker potatoes 181, IGO, and 148 stacks, respectively, Half Sugar 

 and Danish Sludstrup mangels .57,080 and .52,200 lbs., Danish Baldhead cabljase 

 3G,300 lbs., ^Yhite Belgian stock carrot 24,.500 lbs., and Danvers Half Long car- 

 rot 30,200 lbs. per acre. 



[Report of field crops work on the Aberdeen substation, 1918], L. C. Aichkr 

 {Idaho Sta. Bid. 113 {191S), pp. 3//-.37). — The continuation of work along the 

 same general lines as previously indicated (B. S. R., 39, p. 334) is described. 

 It is stated that this was the driest season since the substation was estfib- 

 lished, the precipitation during the growing season being 3.37 in. as compared 

 with an average of 4.16 in. Work on the dry laud farm may be summarized 

 as follows: 



Alberta Red, Ghirka, and Theiss winter wheats produced average yields 

 of 18.8, 18.G, and 18.1 bu. per acre, re.spectively, for the 6 years 1913 to 1918, 

 while the yield of spring wheat varieties tested ranged from 6.6 bu. for 

 Kubanka to 12 bu. for both Early Baart and Bluestem. Sixty-day oats pro- 

 duced 20.4 bu., and Smyrna and Beldi spring barleys 14.1 and 12.9 bu., re- 

 spectively. The highest yield of flax, 7.8 bu. per acre was secui-ed from C. I. 

 No. 30. 



Field poas grown in a variety test for the period of 1913 to 1918, inclusive, 

 ranged in yield from 6.7 bu. per acre for Cossack and Bangalia to 8.1 l)u. for 

 both Grey V/inter and McAdoo (formerly Kaiser). 



The average yield of potatoes for 3 consecutive seasons ranged from 100.8 

 bu. per acre for Early Six Weeks to 224. .5 bu. for Idaho Rural. Potatoes 

 grown from seed produced on irrigated land yielded 8.9 bu. more per acre 

 than those grown from seed produced on dry land. With yields ranging over 

 200 bu. per acre, however, this increase is deemed negligil)le and is held to 

 indicate that the supposed superiority of irrigated seed potatoes does not 

 exist. 



Cultivating winter wheat or plowing under green manure did not prove 

 profitable. Wheat grown on summer fallow produced 6.2 bu. per acre as com- 

 I)ai-ed with a general average of 4.4 bu. for the winter wheat plats. A rota- 

 tion of wheat and field peas has given the best results of any rotation, but if 

 continued without fallow is said to lead to reduced yields of both crops. 



Results secured on the irrigated farm may be summarized as follows: 

 Spring whe:it yields ranged from 39.1 bu. per acre for Early Baart to 51.2 

 bu. for Dicklow for the period of 1913 to 1918. The yield of oats ranged 

 from 106.1 bu. for Swedish Select to 11.5.1 for Golden Rain, and of barley 

 from 73.1 bu. for Smyrna to 87.4 bu. for Trebi for^the same period. Smyrna 

 flax produced a 3-year average yield of 26.G bu. 



World Prize and Wellwood field peas are said to have given the highest 

 yields in a 5-year test. The average yield for 19 varieties of field peas was 

 55 bu. per acre. Grimm alfalfa produced at the rate of 5 bu. of seed per 

 acre, red clover 3 bu., and alsike clover 2.5 bu. 



Idaho Rural, Green INIountain, and Irish Cobl)UM- potjitoes, with .5-year aver- 

 age yields of 400, 397.4, and 352.3 bu. per acre, respectively, were the leading 

 varieties tested. No increase in yield has been secured in transposition tests. 



[Report of field crops work in Iowa, 1918 1 (loira HIa. Ri>t. IHIS, iip. 10-12, 

 2.'i. 25, 2f?).— This descrilios the progress of work along the same general lines 

 as previously noted (E. S. R., 40, p. 328). 



