1036 EXPERIMENT STATION RECORD. 



2 tons each, and vetch with about 15 tons per acre. The soy bean produced 

 a total yield of nitrogen of about 140 lbs. per acre, being closely followed by 

 crimson clover, i-ape, and vetch, while the cowpea gave 69 lbs. per acre, or about 

 half as much as the soy bean. 



By rating the nitrogen at 12 cts., the potash at 5 cts., and the phosphoric 

 acid at 3 cts. per pound, the money value per acre of these constituents for the 

 best 8 cover crops ranged from $17.90 for red clover to $25.84 for rye and vetch, 

 the average being $21.48. Of this average value the nitrogen represented 

 $15.21, the potash $5.13, and the phosphoric acid $1.14, being 71, 24, and 5 per 

 cent of the whole value, respectively. In crimson clover, which has the most 

 phosphoric acid relatively and absolutely, this constituent represented only 8 

 per cent of the whole value. The highest potash value, $8.07 per acre, was 

 found in the rape, where it constituted 32 per cent of the whole. The cow- 

 horn turnip with $7.14, and rye and vetch with $6.76 for potash, stood next, but 

 in each of these this element constituted 34 per cent of the w^hole. 



Soil moistui'e determinations were made on plowed and unplowed soil. On 

 an average for the season the unplowed land contained 3.7 per cent less moisture 

 than the plowed soil. During the autumn and winter months the subsoil of 

 the plowed portion contained on an average 3.7 per cent more moisture than 

 the unplowed portion. 



Selective propagatiou of corn. — Analyses were made of 335 ears of seed corn 

 secured throughout the State, and it was found that the protein content ranged 

 from 8.31 to 11.31 per cent. Directions for the selection of seed corn ai'e 

 given. 



Crop production in western Nebraska, W. P. Snyder and E. A. Burnett 

 (Nebraska Sia. Bui. 95, pp. SJf, figs. 8). — This bulletin contains a description of 

 the substation at North Platte, together with a report of the results obtained 

 with different kinds of crops. The requirements of dry-land farming are also 

 outlined. 



Of a number of durum wheats grown. Black Don and Velvet Don have given 

 the highest yields. In variety tests of 3 years the highest yielding durum wheat 

 gave an average yield per acre of 18.5 bu., and the lowest of 13.9 bu.. while the 

 common spring wheat yielded 7.2 bu. The average yield per acre during the 3 

 years was with durum varieties 2^ times that of the common spring wheat. 

 The results of winter wheat tests showed that Kharkof outranked Turkey Red 

 in yield. It was observed that it is advisable to sow winter wheat before Sep- 

 tember 15. Seeding 2 pk. per acre gave practically the same yield as seeding 

 4 or 5 pk. 



In 1906, Sixty Day oats yielded 47.8 bu. and Kherson 47 bu. per acre, but the 

 results of all tests made during 3 yjears placed Kherson first and Sixty Day and 

 Texas Red a close second and third, respectively. The highest yield of oats 

 secui'ed at the substation was 52 bu. per acre on a 5-acre tract, but yields of 75 

 and 80 bu. are reported by farmers growing Kherson oats from seed secured at 

 the substation. 



P.eldi and Telli barley, 2 Algerian varieties, did not yield as well as common 

 bearded barley, which on 1 plat produced 44.4 bu. per acre, as compared with 

 29.4 bu. for hullQss and 17.8 bu. for beardless. Emmer did not appear to yield 

 as heavily as barley. 



The average yields of different varieties of corn grown for 2 years ranged 

 from .39.8 bu. for Pride of the North to 45.9 bu. for Silver Mine. Calico, yielding 

 45.6 bu. per acre, is considered the best corn tested. This variety and Pride of 

 the North matured fully. 



The results with different annual forage crops are also briefly noted. The 

 highest average yields for 2 years from cane, Kafir, and milo were secured when 



