FIELD CROPa. 733 



Curves show the variation in weight of grain and in height of mature stalks 

 while tables show the variation constants and summarize the correlation co- 

 efficients. The author concludes that " it is improbable that much use can be 

 made of correlation in practical breeding. . . . This is especially true of cor- 

 relation between seed production and other characters." 



A bibliography of 32 titles is appended. 



Selecting and judging corn, C. B. Hutchison {Missouri Sta. Circ. Inform. 

 45, pp. 85-88, fig. 1). — Directions for the selection of corn for show are accom- 

 panied by a score card and statement of variety standards and by directions for 

 applying the points of the score cai'd. 



Maize variety test at Skinners Court, season 1909-10, J. A. T. Walters 

 {Transvaal Agr. Jour., 9 (1910), No. 33, pp. 52-55).— A table states the time 

 of planting, flowering, and rii^ening, the average weight per ear, and the height 

 of 42 varieties of corn, mainly from the United States. Results indicate that 

 the time from the first appearance of the plant above ground to flowering is 

 exactly half the total time required for ripening. Will Gehu and Will Dakota 

 I'ipeued seed in 87 days. 



Sulla clover, H. W. Budd {Jour. Dept. Agr. Victoria, 8 {1910), No. 12, pp. 

 800, 801, fig. 1). — The plants were watered once and by July 10 averaged 5 ft. 

 in height, another second growth was 2 ft. high in October. " The plant is 

 eaten greedily in its green state by cattle, and should prove an eminently satis- 

 factory crop for dairy winter feeding, or for ensiling." Tables report chemical 

 analyses of the first and second growths. 



Guide to cotton culture in the German Colonies, A. Zimmermann {Anlei- 

 tung fiir die Baumwollkultur in den Deutschen Kolonien. Berlin, 1910, pp. 

 V 11+ 159, figs. 26, dgms. 2). — This is a manual of information for the use of 

 the cotton grower in the German Colonies. The plant is described, the principal 

 varieties discussed, and directions given for seed production, choice of soil and 

 climate, laying out and preparation of fields, fertilization, irrigation, sowing, 

 cultivation, harvesting, handling, and seed selection. Suggestions are also given 

 for rotations and the prevention of injury by insect pests and diseases. A full 

 bibliography is given. 



Japanese cane for forage, J. M. Scott {Florida Sta. Bui. 105, pp. 53-68, 

 figs. 5). — A discussion of the history, uses, and soil requirements of Japanese 

 oane is followed by directions for saving seed cane and for producing and 

 harvesting the crop. 



A table presents the results of two years' fertilizer tests of dried blood, sul- 

 phates of ammonia and potash, muriate of potash, acid phosphate, and gi'ound 

 limestone in various combinations. Considerably the highest yields of cane in 

 1909 followed applications per acre of (1) 112 lbs. dried blood, 84 lbs. muriate 

 of potash, 224 lbs. acid phosphate, and 2,000 lbs. ground limestone, and (2) 112 

 lbs. of dried blood, and 84 lbs. muriate of potash, while in 1910 the highest 

 yield followed the use of 72 lbs. sulphate of ammonia in place of the dried blood. 

 The author regards the best formula for use on this crop as an unsettled ques- 

 tion, but suggests that the use of from 400 to 600 lbs. per acre of a mixture 

 containing 3 per cent of ammonia, 6 per cent of phosphoric acid, and 7 per cent 

 of potash, with 2,000 lbs. per acre of ground limestone. 



The air dried sample of the cane was found to contain 6.75 per cent water, 

 1.37 per cent protein, 1.89 per cent fat, 20.60 per cent fiber, 2.04 per cent ash, 

 and 67.35 per cent nitrogen-free extract (sugars, etc.). 



Investigations of old Norwegian oat varieties, W. Christie {Tidsskr. 

 Norske Landbr., 11 {1910), No. 3, pp. 129-158).— This is an address delivered 

 before the Society of Norway's Weal. 



