1030 EXPERIMENT STATION RECORD. 



with (lata regardinj; lln- i-niiiiiifric of this sl:i|ih' mid its iiriHlnction tliroughont 

 the world. 



Score cards for dent corn {Ohio Sla. ('in: ,S'6', pi>. 3). — This circular i)rcsonts 

 tlu' score cards for use in the final selection of seed ears, in the plant selection 

 for seed ct)rn, and in judjiiiij; varieties of corn at husking time as adopted by 

 the Ohio Corn Improvement Association November 24, 1908. Explanatory notes 

 on all the points are given. 



Fertilizer tests with cotton, F. D. Stevens (Alabama Cancbral:e Sta. Bui. 26, 

 pp. 3-18). — A computation is presented showing that by disposing of the lint 

 and seed of IS hales of cotton itroduced on the station farm in 1907 there was 

 removed from the land 574.2 lbs. of nitrogen, 188.1 lbs. of acid phosphate, and 

 27(J.l lbs. of potash, representing .$107.92, $10.72, and $10.20 in money value, 

 respectively. 



A comparative fertilizer test on poor red prairie land indicated a net gain 

 in value of lint of 58 cts. per acre from the use of 200 lbs. of cotton-seed meal, 

 $3.56 from 240 lbs. of acid phosphate, and $3.70 from a combination of these 

 two applications. The results of a more extended trial show the greatest net 

 gain from using 160 lbs. of cotton-seed meal and 240 lbs. of acid phosphate. 

 In this case the net profit was $4.52 per acre, w'hile the use of 1(X) lbs. of kainit 

 in addition to this application resulted in a loss of $3.67. The use of the kainit 

 alone produced a net gain of $1.53 per acre. 



The results of a third experiment rei)orted again show the value of applying 

 cotton-seed meal with acid phosphate. An application of 230 lbs. of cotton- 

 seed meal and 320 lbs. of acid phosphate was used at a profit of $5.75 per 

 acre, which was surpassed only by the use of 100 lbs. of nitrate of soda giving 

 a net profit of $11.57. 



On dark prairie soil the best net gain per acre was also made by using nitrate 

 of soda alone, but it amounted to only $5.32. Applying the nitrate with acid 

 phosphate in the scooter furrow before planting and using acid phosphate alone 

 resulted in losses. In another test on this black calcareous prairie soil the 

 largest net gain, $12.48 per acre, was secured where 200 lbs. of nitrate of soda 

 and 200 lbs. of cotton-seed meal per acre had been given. The addition of 200 

 lbs. each of kainit and acid phosphate reduced this gain to $6.02. When the 

 cotton-seed meal was omitted a loss of $7.97 was sustained, and when nitrate 

 of soda was replaced by cotton-seed meal a loss of $9.21 per acre. The least 

 ])rofital)le aiiplication consisted of 200 lbs. each of kainit and acid phosphate, 

 which resulted in a loss of $10.60. 



Heavy aiuuial applicatitins of commercial fertilizers on land growing cotton 

 tor five con.secutive years gave the largest increase in yield during the first 

 2 years, the returns being more than doubled as compared with the yields on 

 untreated land. A comparative test of alfalfa and cotton showed that alfalfa 

 was much more profitable. Alfalfa turned under apparently increased the yield 

 of seed cotton of the follow'ing cotton crop by 622 lbs. 



Among a series of winter cover crops crimson clover seemed most efficient 

 in incieasing the cotton yield. Crushed lime rock on poor red prairie upland 

 reduced the yield. The cowpea sown broadcast in standing corn alternated 

 with cotton was found efficient in maintaining the fertility of the soil. 



Recent experiments with oats, C. G. Williams (Ohio Sta. Circ. 8S, pp. 8). — 

 Among the 25 best varieties of oats grown at the Ohio Station, Siberian, Sixty 

 Day, Improved American, Illinois German. Joauette, Green Mountain, and Big 

 Four led in productive capacity, the range in yield of grain being on the aver- 

 age for the 5 years from 68.34 bu. for the last mentioned variety to 70.46 bu. 

 for the first mentioned. 



