530 EXPERIMENT STATION RECORD. 



Distance (p. 1027).— At distances of 8, 12, IG, 20, and 24 iu. in the 

 drill 1 and 2 stalks of cotton were left. In 18D3 2 stalks in a place 24 

 in. apart gave the best results. 



Variety tests and cooperative fertilizer experiments with cot- 

 ton, J. In". Hook {SoutJi CaroVina Sia. Bui. 18, n. ser., pp. iJ3). — Of 14 

 varieties tested at tlie station in 1S93, Truitt gave the largest yield of 

 seed cotton, 1,660 lbs. per acre. The results of fertilizer experiments 

 conducted at the station and in ten other localities within the State 

 are tabulated. No conclusions are drawn. The bulletin contains notes 

 on the history of cotton. 



Experiments withcowpeas, H. IST. Starnes {Georgia Sta. Bui. 23, 

 pp. 89-108). 



Synopsis. — Tests of fertilizers aud varieties. Pliosphoric acid gave best results both 

 iu the production of vines and of peas. The use of nitrogeu aud potash was 

 not profitable. The black pea gave the largest yield of peas aud of vines. In 

 geueral the varieties making the heaviest growth of viues produced the largest 

 yield of peas. 



Fertilizer tests (pp. 89-103). — For this test there were used 51 plats 

 with strong clay soil and stiff clay subsoil, "rather better than tlie 

 average land, having been planted for 2 consecutive years i)reviously 

 in sweet potatoes." Whip-poor-will peas were sown in drills June 13. 

 The peas were picked 3 times; on half of each plat the vines were cut 

 and weighed August 30. 



The yield and value of peas and vines and the profit and loss from 

 applying fertilizers are tabulated and illustrated by diagrams. The 

 yield of peas on the unfertilized plats averaged 12.24 bu. per acre; the 

 green viues (entire plants) on the uufertilized plats averaged 10,270 lbs. 

 per acre. The largest yield of peas, 16.56 bu. per acre, and the largest 

 yield of vines, 16,328 lbs., were made by 360 lbs. of cotton-seed meal 

 and 960 lbs. of superphosphate. The following are the author's 

 conclusions : 



"It is money thrown away to ajtply any form of nitrogenous fertilizer to cowpeas. 



"The use of potash salts in any form appears uniu'olitable, large doses, especially 

 of kainit, proving positively injurious. 



"Complete fertilizer.s appear to be valuable only iu direct proportion to the pre- 

 ponderance of phosphoric acid in the combination. 



"Heavy apijlications of any form or combination of fertilizers, including phos- 

 phates, are unprofitable. 



"Moderate doses of superphosphate, or Florida soft phosphate (ground rock, 

 untreated), produce the largest gross yield as well as the greatest jirofit. 



"The amount of phosphates whicli maybe safelj' depended ui>on differs, of course, 

 with the character of the laud. The better the soil (iu its mechanical composition 

 as well as in its chemical contents) the greater the amount that may be used with 

 profit. A range of from 2oO to 400 lbs. per acre of acid phosphate and of perhaps 

 double that amount of soft phosphate would probably cover all contingencies." 



Varieties (pp. 104-108). — Twenty- two varieties of cowpeas were grown 

 in rows 4 ft. ai^art. The maximum yield of green vines, 18,876 lbs. per 



