624 EXPERIMENT STATION RECORD. [Vol 40 



15 bu., respectively, after buckwheat and oats ; from 20 to 23 bu. after cabbage, 

 beets, onions, rye, squashes, and potatoes ; and 34 bu. after turnips. 



The lowest yields of alsike clover for the 2 years ranged from 2.53 to 2.6 

 tons per acre after the clovers and carrots (formerly mixed timothy and red- 

 top) and the highest yields from 4.16 to 4.33 tons following rye, redtop, and 

 2 years' failure of squashes. Yields ranging from 3.31 to 3.86 tons were ob- 

 tained after the other crops. 



Observations of miscellaneous instances of effects of crops on those planted 

 the next year in a crosswise direction are noted, which are thought to indicate 

 that these effects were less pronounced in neutralized soils. The amount of 

 nutrients removed by the crops was determined in many instances, but it w;is 

 observed that the crops which removed the largesl amount of the scarcest nu- 

 trients were not always the ones which exerted the most depressing effect on a 

 succeeding crop. 



Report of agronomy department. M. A. Beeson (Oklahoma Sta. Ri>t. 1918, 

 pp. 14-22). — This describes the continuation of work with field crops for the 

 year ended June 30, 1918, along the same general lines as previously noted 

 (E. S. II.. ■}••. p, 32), including results of variety tests with oats, cotton, wheat, 

 cowpeas, peanuts, ami grain and forage sorghums; plant breeding work with 

 cotton, Bermuda grass, grain sorghums, and peanuts; rate and date of seeding 

 tests and hay harvesting experiments with Sudan grass; fertilizer, rotation. 

 and cultural tests with cereals, alfalfa, OOWpeaS, and Katir corn; and depth of 

 plowing tests with Katir corn, cotton, and oats. Several lines of investigation 

 dealing with increased production and the maintenance of soil fertility, which 

 received special stimulation as war work, are also briefly outlined. 



LWork with field crops in South Carolina], C. P, Bl kCKWELL and H. E. 

 Cubrim [South Carolina Sta. Rpt. 1918, /</>. 18-20, 38-39, 1,0, 1,1).— This briefly 

 notes variety, fertilizer, and breeding te.-ts with cotton, corn, and peanuts. 



The best cottoD varieties tested both at Clemson College and at the Pee Dee 

 Substation were more profitable by $100 per acre than the poorest varieties. 



Observations on the efleel of pollen from barren stalks of corn on the amount 

 of barrenness in the progeny Indicated a ratio of on,, barren to 2.36 fruitful 

 plants. An apparent correlation was also noted between barrenness and such 

 characters as color, size and shape of plant, length of life, etc. 



Work of the Wisconsin Agricultural Experiment Association. II. W. 

 Ai.KKinz [Madison: Wis. Expt. Assoc., /.''/.''. pp. £8, figs, 22). — This brietly out- 

 lines the organisation and scope of the association. Pedigreed field crops, In- 

 cluding corn, barley, winter ainl spring wheat, oats, rye, soy beans, and field 

 peas grown by the members, are described and the history and adaptation of 

 the crops noic. I. 



Results of cooperative experiments in agriculture, C. A. Zavitz (Ontario 

 Dept. Agr. liul. 260 (1918), pp. 3-2', ) .— This reports the continuation of work 

 during 1917 along the same general lines as previously noted (E. S. R., 39, 

 p. 737). It is stateil that fully 1,000 more tests were undertaken than in 1916. 



Guide to experiments for 1918 [in Northumberland County. England], 

 D. A. Gilchrist (County Northumb. /•;</. Com, Hut. 27 (1918), pp. 4-78). — This 

 presents an outline for a continuation of work with held crops along the same 

 lines as those previously noted (£. S. EL, 38, p. 432), together with a general 

 summary of earlier results. 



[Yielding capacity of different field crops], B. W. LJUNG (SveriQes I'tsa- 

 desfor. Tidskr., 2s {1918), \<>. ',. /»/>. 168 181, Has. 8).— This article represents 

 a paper read before the Swedish Seed Association, in which the results of ex- 

 periments conducted tor a aeries of years with various field crops at several 

 of the more important Swedish experiment stations are summarized and com- 



