144 EXPERIMENT STATION RECORD. 



yield is 7i bu. per acre valued at $3.80 per bushel. Corn could in most in- 

 stances be matured after the crop of crimson clover and was regarded by the 

 majority as the best crop for crimson clover sod. The majority of the replies 

 indicated that crimson clover hay equalled or excelled cowpea or red clover 

 hay, caused no injurious effects, and excelled cowpeas for soil improvement. 

 The crop was apparently satisfactory as silage where tried, was universally 

 reported equal to or better than red clover as pasture, and increased the pro- 

 ductiveness of the soil by an average of 66 per cent. Fifty per cent of the 

 growers held that the crop gave as good fertilizer results when cut as when 

 plowed under, while S6 per cent state that a notieeaI)le increase in yield follows 

 a short growth, and 94 per cent of the replies on this point indicate that it 

 succeeds on land that fails ttr produce red clover well. 



A digest is also given of work with crimson clover at several stations. 



The nitrogen content of inoculated and uninoculated alfalfa plants, F. J. 

 Alway and R. M. Pinckney {Nebraska Sta. Rpt. 1909, pp. 33, 3.J). — It was 

 usually possible to determine by the deeper green color the plants having 

 nodules. The inoculated plants analyzed were invariably much higher in nitro- 

 gen content of stalks and roots. 



The curing and testing of seed corn, R. A. Moore ( Wisconsin Sta. Circ. 

 Inform. IS, pp. 12, figs. 10). — Directions for curing small and large lots of seed 

 corn and making germination tests accompany plans for a corn-curing house. 



Manchurian millets, A. H. Haywood {Agr. Gaz. N. 8. Wales. 21 {1910), No. 8, 

 pp. 691-093, figs. 3).— At the Grafton Experimental Farm white and yellow 

 varieties of Hsiao-mi Manchurian millet produced estimated yields of 49 bu. 

 and 52 bu. 48 lbs. of seed per acre, respectively, when drilled in rows 2i ft. 

 apart. 



Trial of varieties of potatoes, 1909-10, G. Valder {Agr. Gas. N. S. Wales, 

 21 {1910), No. 9, pp. 737-7 J,5, pis. 6, figs. 2).— Brief descriptions of each of the 

 8 varieties of potatoes tested are given and the yields of each variety on each 

 of the test farms stated in a table. 



The average yields following applications of 4 cwt. of potato fertilizer per 

 acre showed " a gain by manuring of about 15 cwt. of potatoes per acre at a 

 cost of about 32 s." In another test on red soil at Wollongbar, 500 lbs. per 

 acre of superphosphate produced a slightly greater yield than 500 lbs. of bone 

 dust and each produced nearly twice the yield obtained on unmanured plats. 

 Whole seed produced a slightly greater average yield than cut seed, but the 

 various tests were so contradictory " that no definite rule can be laid down." 



"Wheat growing and its present day problems, E. J. Rltssell {Sci. Prog. 

 Twentieth Cent., 5 {1910), No. 18, pp 286-301, fig. i).— On the Broadbalk Field 

 at Rothamsted, the increase in wheat yield for each 43 lbs. of nitrogen added 

 varied from 1,172 to 1,885 lbs. of straw and grain. The first increment of nitro- 

 gen increases the root system as well as the amount of material that each unit of 

 root surface can take up. The second increment of nitrogen produces a larger 

 increase than the first increment but this does not go on indefinitely. Other 

 topics dealt with are the relation between precipitation and wheat yield, 

 quality and composition of grain, economic problems of wheat production, and 

 the part plaj-ed by the soil. 



Wheat experiments, season 1909, G. Valder {Agr. Gas. N. 8. Wales, 21 

 {1910), No. 8, pp. 671-678, figs. 2). — A table presents the results of variety and 

 manurial tests of wheat on a number of different farms. 



In 31 trials, " Federation easily takes first place with an average of 24 bu. 

 23 lbs." In each of the geographical divisions in which it was tested this 

 variety excelled in yield the local varieties. An application of superphosphate 

 produced an apparent increase in yield of nearly 2 bu. and the addition of a 



