530 EXPERIMENT STATIOX RECOED. 



field looked better during the growing season, yet when threshing was done the 

 grade was considerably poorer, as the grain was shriveled and affected badly 

 by rust." 



With oats fall plowing to a depth of 5 to 6 in. gave a yield of 3.63 bu. more 

 than upon the 12-in. fall plowing, and 11.75 bu. per acre more than upon the 

 3 to 4-in. spring plowing. Similar results are noted with barley. 



[Field crops experiments, 1912], E. D. Stewart and J. H. Sheppeed (North 

 Dakota 8ta., Rpt. Langdon Suhsta. 1912, pp. 7-32, figs. Jf).— This gives results 

 of variety tests with alfalfa, w^heat, oats, barley, potatoes, and cultural trials 

 with corn, clovers, peas, peas and oats, vetch, timothy, millet, flax, winter and 

 spring rye, emmer, winter wheat, oats, and potatoes, with notes upon the 

 5-year and a 6-year rotation. 



In studying the root system of wheat grown on land fall plowed 3 to 4 in., 

 5 to 6 in., and 12 in. deep "it was found that 50 per cent of the roots grew 

 to the depth of 2 ft. and over, and many roots were traced down to the depth 

 of 6 ft. in the 3 different depths of plowing. It was also found that there 

 w-as little or no difference in the root system in the different depths of plowing." 



[Field crops experiments, 1913], E. D. Stewart and J. H. Sheppeed (Xorth 

 Dakota Sta., Rpt. Langdon Substa. 1913, pp. S-26. figs. 3). — This reports variety 

 tests of wheat, oats, barley, and potatoes, and on cultural experiments with 

 corn, peas, alfalfa, clover, flax, winter wheat, winter rye, early and late seeding 

 of wheat, rates of seeding wheat upon corn ground and upon timothy sod, 

 methods of treating corn stubble to be sowed to wheat, differeuL rates of seed- 

 ing oats and barley, and different depths of plowing for wheat, oats, barley, 

 timothy, and corn, and notes on rotations. 



Summary of results [in] field husbandry, 1913. O. C. Whitest al. (Canada 

 Expt. Farms Bui. 15 (1914), PP- 43). — This bulletin gives in a summarized 

 form the more important of the season's results secured from crop production 

 and field experimental work as carried on at the several experimental farms 

 in continuation of previous work (E. S. R., 32, p. 431). 



Numerous crop rotations are described. The costs of operations per acre of 

 the several rotations at the central station for 1913 are given as ranging from 

 $17.08 to $21.83, and the average profits for eight years preceding 1912 as rang- 

 ing from $8.15 to $10.08 per aci'e. The cost of production for oats is given as 

 30.8 cts. per bushel, for hay (first year) $4.06 per ton, hay (second year) 

 $4.12 per ton, turnips $1.86 per ton, and corn $1.72 per ton. 



In regard to the use of barnyard manure and commercial fertilizers in these 

 rotations, it is noted that " the five years' results . . . show a distinct advan- 

 tage of barnyard manure alone over commercial fertilizer alone for this soil, but 

 point to the possibility of combining the two to good advantage when barnyard 

 manure is scarce or high in price." 



The eradication of couch (twitch or quack) grass by the use of the spring 

 tooth and smoothing harrows is noted. 



The cost of production per bushel of the rotation crops at Xappan, Nova 

 Scotia, are given as follows : Turnips 5.94 cts., mangels 7.68 cts., potatoes 13.13 

 cts., oats 28.9 cts.. wheat 48.9 cts., barley 40.8 cts.. and silage corn $3.10 per ton. 



At Cap Rouge, Quebec, the results of different rates of seeding corn (Long- 

 fellow) for silage during three years are given as follows: In rows 8 by 42 in., 

 9 tons 1.094 lbs. per acre; 8 by 48 in.. 8 tons 1,754 lbs.: in hills 36 by 36 in., 5 

 tons 1,398 lbs. ; and 42 by 42 in., 5 tons 1,364 lbs. 



At Indian Head, Saskatchewan, the profit per acre on land in a 3-year 

 rotation of summer fallow, wheat, and wheat is given as .$9.61 ; of a 6-year 

 rotation of summer fallow, wheat, wheat, oats (seeded down with western rye 



