FIELD CROPS. 



1035 



rattoons the unstripped cane showed a higher ijercentage of sucrose in the juice 

 and a hijrher coefficient of purity than the stripped cane. 



Variety tests of wheat, A. N. Hume, O. D. Center, and L. Hp^gnauer {llli- 

 iinis- ,stii. Bill. Lil, pp. 7l-'J2, fiyx. 5). — The experiments reported were conducted 

 under a method designed to eliminate to some extent the effects of soil differ- 

 ence from variety tests for any given year. This method is based essentially 

 upon the assumption that differences in soil fertility occur gradually from plat 

 to plat and that the yields of the several plats should be increased or decreased 

 in proportion as the yield of the nearest standard or checlv plat is lower or 

 higher than the average of all the standards. The results in this bulletin show 

 that such calculation liad no great effect upon the conclusions. 



The following table shows the actual yields of the varieties grown for 4 j-ears 

 and the corrected returns as based on this method : 



Yields of varieties of ivheat tested at Urbaiia. 



Variety. 



Actual yield per acre . 



1904. 1905. 1906. 1907 



Bu. 



Turkey Red 32.1 



Malakoflf 31.4 



Hungarian 18.9 



Dawson Golden Chaff I 16.8 



Rudy j 12.7 



Indiana Swamp 12.8 



Wheedling 15.2 



30.0 



27.7 

 29.0 

 25.1 

 27.9 

 28.7 

 25.5 



Bu. 



46.6 

 46.4 

 36.0 

 36.4 

 38.2 

 37.0 

 40.2 



,., Aver- 



Bu. 



45.5 

 45.5 

 42.4 

 47.5 

 43.9 

 41.6 

 38.5 



Bu. 



38.5 

 37.7 

 31.6 

 31.4 

 30.7 

 30.0 

 29.8 



Computed yield ]>er acre. 



1904. 1905. 1906. 1907 



Bu. 



34.1 

 28.1 

 20.0 

 17.4 

 13.5 

 10.5 

 12.6 



Bu. 



30.0 

 28.0 

 26.9 

 26.7 

 27.6 

 27.6 

 26.4 



Bu. 



44.7 

 46.6 

 37.0 

 34.5 

 41.2 

 36.9 

 42.4 



Bu. 



45.6 

 45.5 

 42.2 

 47.9 

 43.8 

 42.8 

 38.3 



Aver- 

 age. 



Bu. 



S8.6 

 37.1 

 31.5 

 .31.6 

 31.5 

 29.5 

 29.9 



Turkey Red and Malakoff. which are botanically the same, yielded on an 

 average of 4 years 7.9 and 6.1 bu. more per acre than any other variety tested 

 at Urbana. 



The yields of wheat from soil experiment fields at Ualesburg, Virginia, Bloom- 

 ington, and Sibley are given to show what some of these varieties are capable 

 of doing under other conditions than those obtaining at Urbana. It is pointed 

 out that on plats fertilized with phosphorus in connection with nitrogen the 

 yields of wheat in 1905 were 40.6 bu. at Galesburg. 45.2 bu. at Sibley, 50.9 bu. 

 at Bloomington, and 36 bu. at Virginia. On the crop experiment field at De- 

 Kalb, Kharkov ranked first with an actual yield of 29.5 bu. per acre, followed 

 by Minnesota Winter with 25.6 bu., Turkey Red with 24..3 bu., Indiana Swamp 

 with 22.7 bu., and Malakoff with 22.1 bu. In summarizing these results, to- 

 gether with those secured at the Iowa Experiment Station, it is stated that 

 Turkey Red is the most promising variety, having averaged best or among the 

 best in all these trials. 



The yields of varieties of wheat tested in southern Illinois show that Turkey 

 Red is not so successful in that section as many other varieties. The be.st 

 average varieties in yield for 6 years were Fulcaster, Harvest King, and Red 

 Fultz, averaging 16.5, 16.1, and 1.2 bu. per acre, respectively. These experi- 

 ments also show that home-grown seed wheat may be as good or better than 

 seed brought from a distance. The results of tests at Fairfield indicated that 

 Harvest King and Fulcaster are comparatively well adapted to the locality, 

 and that the Russian wheats, Turkey Red and Malakoff, and the Hungarian, 

 Theiss, are unsuited to southern Illinois conditions. 



The source of seed and its influence on crop production is discussed and the 

 results along this line .secured at different experiment stations are reviewed. 

 The authors i>elieve that there seems to bp no adequate evidence showing that 

 the practical wheat grower cau hope for any gain from changing seed wheat 



