F1P]LD CROPS. 1071 



liiiiation tlic^ crops required 114 days to mature and yielded on an average 10.4 tons 

 per acre, at a cost of |1.85 per ton. The lowest cost per ton was $1.41 and the high- 

 est !?2.08. In one instance the combined crop consisted of Gd percent of corn and 

 34 i)er cent of sorglnnn, and in another 45 per cent of corn and 55 per cent of sor- 

 ghum. It is suggested that al)out 12 11)S. of corn and 5 lbs. of sorghum seed be used 

 I)er acre and ])lanted in rows 2.5 or 3 ft. apart. Peas were grown with corn and sor- 

 ghum for the purpose of increasing the protein content of the silage, but the quantity 

 of the peas in the crop never exceeded 15.1 per cent, and in some instances amounted 

 to only 5 or 6 per cent. This quantity was insufficient to materially influence the 

 composition of the silage. 



IMammoth Yellow soy beans produced an average of 7.5 tons per acre. About 

 2 1)U. of seed was used per acre. The crop re<iuired 138 days to mature, and the cost of 

 the silage per ton was $2.83. The silage was not palatable to cattle, and the authors 

 believe that soy beans for silage should be grown with corn or sorghum rather llian 

 alone. 



The use of fertilizers in connection with these experiments showed that heavy 

 applications are not always satisfactory. The results indicated that the use of 

 from 100 to 150 lbs. of high-grade acid phosphate and from 25 to 50 ll)s. of muriate 

 of potash will often ]irove protitable. Barnyard manure is considered the best fer- 

 tilizer, and 5 tons of it per acre applied annually more effective than 10 to 15 tons 

 at a time. 



Notes are given on harvesting silage crops, filling the silo, and the use and value 

 of silage. 



Cotton culture, R. J. Redding {Georgia Sta. T>al..63, pp. 101-130). — The experi- 

 ments here described are similar to previously reported work (E. S. R., 14, p. 10(10). 

 The results of a test of 21 varieties are reported in a tal)le. The total value of lint 

 and seed per acre at 12 cts. per pound of lint and 70 cts. per 100 pounds of seed, 

 amounted to $78.17 in the case of Cook Improved, the leading variety, and in the 

 cases of Prize, Moss's Improved and Texas Bur to $67.24, $66.92, and $65.26, respec- 

 tively. The values for all other varieties ranged from $51.40 to $64.32. Cook 

 Improved and Texas Bur also stood among the 4 earliest varieties. 



For the past 10 years a number of varieties have been grown for the purpose of 

 comparing the relative merits of the half which were most productive each year with 

 the remaining less-jiroductive sorts. The results for the entire series of years shows 

 that the average yield of lint, based on the production of seed cotton, was 34 percent 

 and 32 per cent for the most productive and the least productive varieties, respectively, 

 the number of bolls to the pound, 70.4 and 76.1, the number of seeds to the pound, 

 4,124 and 4,179, and the average of total yield harvested to the time of the second 

 picking, 56.3 per cent and 58 per cent. The leading varieties grown in this test are 

 briefly noted. 



This season Schley, a medium early variety, gave a better yield than either Mascot, 

 an eirly sort, or a mixture of these 2 varieties; but the average results f(jr 6 years 

 are iu favor of the mixture, which consisted of an equal number of seeds of the 

 varieties. 



As in former years a nitrogen test was conducted, using different fertilizer appli- 

 cations, each representing a cost of $4.15, but with an increase in phosphoric acid 

 and potash and a decrea e in nitrogen in the series. The best returns were obtained 

 from 250 lbs. of acid phosphate, 25 lbs. of muriate of potash, and 200 lbs. of 

 cotton-seed meal, the value of the increase in yield at 4 cts. per pound of seed cotton 

 amounting in this case to $15.04. This application contained 8.98 jier cent of plios- 

 phoric acid, 2.68 per cent of jiotash, and 3.26 per cent of nitrogen. A potash test on 

 the same general i)lan as the nitrogen test just noted was conducted on two 1-acre 

 flehls. In this case the apjilications represented a cost of $6.50 each per acre. The 

 first field did not give very uniform results, but the first series, cojisisting of 



32846— Xo. 11-04 4 



