1918] FIELD CROPS. 131 



Seed production rests with alfalfa including (1) clipping the alfalfa early 

 when about 8 or 10 in. high, leaving the second growth for seed, (2) harvesting 

 the first crop for hay and leaving the second crop for seed, and (3) leaving the 

 first crop for seed, gave average yields amounting to 2.56, 2.39, and 3.44 bu. 

 per acre, respectively. 



Svanhals and Smyrna barleys, with yields of 45.5 bu. per acre each, were the 

 leading barley varieties tested in 1916. Mariout was lowest with a yield of 

 31.1 bu. 



In variety tests with corn for the 3-year period of 1914-1916, inclusive, U. S. 

 Selection 123 was highest with an average yield of 48.9 bu. per acre and Min- 

 nesota No. 23 lowest with 36.2 bu. Northwestern Dent, with an average yield 

 of 43.4 bu., was the highest of the early-maturing varieties and is held to be 

 th© most dependable variety tested. Six varieties tested for silage production 

 in 1916 gave yields varying from 8.69 tons per acre for Northwestern Dent to 

 14.49 tons for Australian Flint. Although higher yields of silage were secured 

 from late-maturing varieties it was regarded as of rather inferior quality. 



Alfalfa grown on plats fertilized with different amounts of acid phosphate 

 each year since 1913 gave an average yield for all plats of 1.55 tons per acre, 

 with no significant difference in yields due to the fertilizer. 



[Report of field crops work at the Grand Rapids substation, 1916] {Min- 

 nesota Sta., Rpt. Grand Rapids Substa., 1916, pp. 10-23, figs. 7). — This reports 

 the progress of work previously noted (E. S. R., 37, p, 228) during 1916. 

 Meteorological data are summarized for 1915 and 1916. 



In variety tests with spring wheat for 1915 and 1916 the highest average 

 yield, 19.9 bu. per acre, was obtained from Prelude, with Marquis second with 

 17.5 bu. In milling tests with 4 varieties of spring wheat, Prelude gave the 

 highest percentage of flour, 72.7, as compared with 68.8 for Marquis, and was 

 also deemed superior in quality to the other varieties tested. 



Kherson, with a 2-year average yield of 84.1 bu. per acre, was first among 

 the oat varieties tested ; Banner second with 79.5 bu. ; and White Russian 

 third with 78.9 bu. 



In variety tests with barley the maximum average yield for 1915 and 1916 

 was obtained from Blue Ribbon and amounted to 39.1 bu. per acre. Odessa, 

 with 38.4, and O. A. C. No. 21, with 38 bu., were second and third, respectively. 



Variety tests with winter wheat in 1916 resulted in yields ranging from 10.6 

 bu. for Bearded Fife to 26.8 bu. per acre for Turkey Russian. Winter injury 

 to wheat varied from for Turkey Red and Egyptian Amber to 29 per cent for 

 Kharkov. 



Wisconsin No. 2 winter rye yielded 41.4 bu. per acre with no winterkilling. 

 Time-of-seeding tests with winter rye, with planting dates of September 1. 

 September 15, and October 1, resulted in yields of 31.3, 26.1, and 23 bu. per 

 acre, respectively. 



Minnesota No. 13 corn, with a total yield in green weight of 12 tons per acre, 

 was first in the 1916 variety tests and is deemed best for either silage or fod- 

 der, and under favorable conditions is said to mature seed. Minnesota No. 23 

 and early flint corn are recommended for ear corn or for hogging off. 



Eight varieties of field peas were tested for hay and grain production in 1916. 

 Green Canada and Wisconsin No. 508 were first In yield of forage, with 2.4 and 

 2.2 tons of hay per acre, respectively. Wisconsin No. 508, Green No. 208, and 

 Green Canada, with yields of 30.5, 25.8, and 24.6 bu. per acre, respectively, gave 

 the highest yields of seed. 



Variety tests with 6 grasses and 6 clovers resulted in maximum yields of 2.5 

 tons of hay per acre for English bluegrass for the grasses, and of 8.8 tons for 

 Mammoth clover for the clovers. English and Italian rye grasses, with yields 



