FIELD CHOPS. 735 



beluw tht' susceiJtiblc varieties in U»14. Tliis is on aocoimt of the oflects dT the 

 boll weevil. The wilt-resistant varieties are all late and can not be successfnlly 

 grown where weevil damage is heavy. At the same time the early varieties 

 that we have found all seem to be rather susceptible to wilt, so the combination, 

 where both wilt and weevils are present to a serious extent, makes cotton grow- 

 ing out of the question. The Covington-Toole wilt-resistant variety has yielded 

 more cotton than any of the other wilt-resistant varieties in all tests that have 

 been made with it at this station." 



Cotton planted in rows spaced .3, 3^, 4, 4^, and 5 ft. apart yielded at the rate of 

 ] ,600, 1,336, 1.220, 1,200, and 1,176 lbs., respectively, of seed cotton. Cotton spaced 

 32. 24, and 36 in. in rows 4 ft. apart yieldetl at the rate of 1,553, 1,403, and 1,153 

 lbs., resi^ectively, of .seed cotton. " The weevils seemed to have gotten all of 

 the squares after August 10." 



In tests to prevent rust it was found that a plat receiving no treatment 

 yielded at the rate of 4S4 lbs. of seed cotton per acre, one receiving ,300 lbs. of 

 kainit per acre yielded 1.732 lbs., one receiving 10 tons of barnyard manure in 

 1911 .i elded at the rate of l.SOS lbs., and one receiving 10 tons of barnyard 

 manure in 1913 yielded 1.830 lbs. of seed cotton per acre. 



A test of 16 varieties of cotton at the Holly Springs substation, which is 

 reported by C. T. Ames, gave yields ranging from 1.845.2 lbs. to 2.562 lbs. of seed 

 cotton per acre. Cook Alabama Station variety produced the highest yield of 

 seed cotton per acre and was second in percentage of lint (40 per cent), but 

 the staple was only | in. in length, the estimated valuation per acre being 

 $80.95. 



The highest valuation per acre, $96.79, was produced by Durango. with a 

 total estimated yield of seed cotton of 2,111.2 lbs. per acre. Of this, 33.5 per 

 cent was lint having a staple length of li^ in. The longest staple, 1:^ in., was 

 produced by Sunflower, which yielded at the rate of 2,161 lbs. of seed cotton 

 per acre, producing only 28.7 per cent of lint and having a total valuation of 

 $74.40 per acre. Half and Half produced the highest percentage of lint, 44.2. 

 measuring J in. in length, but yielded only 2,304.4 lbs. of seed cotton per acre, 

 which brought the estimated valuation to $78.40 per acre. 



Tabulated results of fertilizer experiments which have been continued for 

 nine years are given. "The u.se of both nitrogen and phosphorus, either alone 

 or in combination, has given very satisfactory results. Phosphorus hastens 

 maturity. The use of potash, either alone or in combination with the other 

 elements, api^ears to be unnecessary in these soils. On thin upland the use 

 of 200 to 300 lbs. of an equal mixture of cotton-seed meal and acid phosphate 

 per acre, placed about 3 in. deep under the seed, should give very satisfactory 

 results. On the more fertile soils the quantity of phosphorus may be increased 

 to advantage. 



"After leguminous crops phosphate alone at the rate of from 200 to 400 lbs. 

 per acre can be used to profit. Where leguminous crops are to be grown, 

 from 300 to 400 lbs. of rock floats can be used to advantage. Where rock floats 

 is mixed with manure the results are most satisfactory." 



Variety tests at the Delta substation, reported by G. B. Walker, showed 

 Express variet.y to be the most valuable producer. 



Express cotton, E. C. Ewing (MifisiHslppi Sta. Ciic, 1915, Jan., pp. 8, figs. 

 2). — This bulletin gives the origin, history, and various characteristics of this 

 variety of cotton. It is noted as being a rather vigorous grower, but not a 

 .storm-proof variety, and rather free from fungus diseases. One of the most 

 distinctive characteristics is its earliness. The length of staple is given as 

 about 1 li' in., and the percentage of lint as about 28. 



