FIELD CROPS. 433 



The "Williamson Plan " of corn culture (South Carolina Sta. Circ. 3, pp. 

 8). — A description of the Williamson method reprinted froDi Bulletin 124 (E. S. 

 R., IS, p. 731). 



Cotton in Hawaii, C. K. McClelland and C. A, Sahr {Hawaii Sta. Press 

 Bui. 34, pp. 2It, figs. 2). — This is a report on the cotton industry of the Hawaiian 

 Islands, which contains directions for the production of the crop and a state- 

 ment of the results of experiments on Sea Island and Caravonica cottons in 

 continuation of earlier work (E. S. R., 27, p. 135). 



As regards Caravonica cotton, " the yield per acre upon the station grounds 

 from 1-year-old trees which had been pruned in December, 1910, was at a rate 

 of 531 lbs. of lint per acre. Upon similar trees pruned in March, 1911, the 

 yield was only at the rate of 363 lbs. per acre, the average yield upon the field 

 being 44S lbs. per acre, which is approximately four times the yield that was 

 obtained from the same field in 1910." 



Pinching back undertaken to induce the growth of fruiting branches and in- 

 crease the yield restricted vegetative growth but showed no great effect on the 

 yield. 



A brief note is given on a trial of semiannual pruning and the production of 2 

 crops per year by E. C. Smith, a pioneer cotton grower of Pearl City, Oahu. 

 The method consists In picking a crop in June and July, immediately pruning 

 back the plants and giving enough irrigation to start new growth, which makes 

 a crop in December and January. At this time another pruning is given which 

 results in another crop in June and July. " Upon 3-year-old plants pruned in 

 July of 1910 a winter crop of 2.5 lbs. per tree was obtained, while in the follow- 

 ing July 4.7 lbs. were picked, making a total of over 7 lbs. seed cotton per tree 

 for the year." This includes all the cotton which opened on the pruned branches 

 within 2 weeks after pruning. When the entire neighborhood follows this 

 method the cotton bollworm can be controlled at nominal expense. 



Sea Island cotton seemed to thrive better as an annual than as a perennial, 

 and an acre produced 292 lbs. of lint. 



Recent cotton experiments {Mississippi Sta. Bui. 155, pp. 29). — This is a 

 continuation of earlier cotton experiments in Mississippi (E. S. R., 23, p. 39), 

 and consists of 4 papers. 



I. Results from the Central Experiment Station, J. W. Fox et al. (pp. 4-14). — 

 Meteorological data are followed by a statement of the results of a variety 

 test in which Simflower, Rowden 116, Columbia, and Cook stood highest in 

 total value of lint and seed per acre in 1911. In 1910, 5 strains of Cook and 

 the Triumph and Covington-Toole varieties constituted the first 7 in money 

 value. 



Applications of 288 lbs. each of kainit and acid phosphate were followed by 

 approximately equal 5-year average yields, both greater than those secured 

 when either was applied with cotton-seed meal or when both were used to- 

 gether. Still higher yields, however, followed the application of 8 tons of 

 manure or of 4 tons of manure with phosphate, kainit, or lime. Another table 

 states the relative earliness of the crop secured after the various applications 

 in different fertilizer tests in 1911. 



" The application of from 200 to 400 lbs. of potash to land on which cotton 

 rusts badly is usually profitable." " We do not get profitable results from pot- 

 ash used here on soils where cotton does not rust." 



Cotton topped July 15 and August 1 yielded 1,931 and 1,788 lbs. of seed cotton 

 per acre, respectively, as compared with 1,756 lbs. secui'ed from the untopped 

 cotton. The order of yields was exactly reversed in 1910, but the dates of 

 topping were about a week later. In 1909 the untopped cotton and that topped 



