I'-i-O] FIELD CROPS. * 333 



A crop rotation for a hog farm, ('. K. TnoaxK (Mo. Bui. Ohio Sla., 5 {1020), 

 No. 5, pp. 131-135, fly. 1). — This article points out the kind of crop production 

 likely to meet tlie requirements on a hog farm, and discusses in tliis connec- 

 tion certain results obtaintnl at the station, especially those with soy beans, 

 as related to crop rotations adapted to hog raising. 



At the Miami County experiment farm a four-year rotation witli corn, soy 

 beans, wheat, and clover has been in progress for nine years, and each crop 

 has been grown every season. Part of the land received acid phosphate at 

 the rate of 2U0 lbs. pe^ acre each on corn and wheat and of 100 lbs. on soy 

 beans. The average yields per acre of the plats receiving this treatment were 

 as follows: Corn, 6G.09 bu. grain and 2,917 lbs.*stover; soy beans, 25.43 bu. grain 

 and 2,813 lbs. straw; wheat, 27.45 bu. grain and 2,950 lbs. straw; and clover, 

 3,794 lbs. hay. 



In another rotation running during this period with corn grown two years 

 in succession, followed by oats and clover one year each, and receiving on part 

 of the land 2(M1 lbs. of acid phosphate on each corn crop and 100 lbs. on oats, 

 the average yields on the treated land were as follows: Corn, first year, .52.9 

 bu. grain and 2,5G2 lbs. stover; second year, 45.94 bu. grain and 2,214 lbs. 

 stover; oats, 57.98 bu. grain and 2,602 lbs. straw; and clover, 2,983 lbs. hay. 



The percentage content of fertilizer constituents of corn stover and of the 

 straw of wheat, oats, and soy beans as determined by analytical work at the 

 Ohio Station, and the manurial value of the quantity of these constituents pro- 

 duced per acre, are shown in tables and discussed. 



Short season hay crops, C. K. Megee {Michiyan Sta. Circ. Jf2 (1920), p. 4). — 

 This mattviial has been noted from another source (E. S. 11., 42, p. 031). 



Wli.v does red clover fail? E. B. Stookey (Washinyton Sta., West. Wash. 

 (S7a. Mo. Bui., 8 (1920), No. 2, pp. 18-20). — ^An article discussing seed and seed- 

 ing, .soil, insects and diseases, and other conditions influencing growth and 

 development of the crop as factors in producing red clover failure. 



Time of applying nitrate of soda to corn, E. F. Cauthen and .T. T. Wil- 

 liamson (Alabama Col. Sta. Bui. 210 (1920), pp. i7-^,2).— The experiments re- 

 ported were conducted at the station from 1910-1916, and in cooperation with 

 farmers in various counties over the State from 1914-1919. The results of 

 each series of tests are given in tables. 



At the station, 120 lbs. of nitrate of soda per acre applied to corn 2J ft. 

 high gave an average increase in yield of 7.5 bu. per acre, the largest average 

 increa.se for the tive-year period as compared with results from making the 

 same application at the time of thinning, when the plants were 3 to 4 ft, 

 high, and when they were ready to tas.sel. Applying the same quantity of 

 nitrate when the plants were 2i f.t. high and again when they were ready to 

 tassel gave an average increase of 9.5 bu. per acre. This double application 

 in a 3-year period gave an average increase of 11.9 bu. per acre, but when 240 

 lbs. of cott(mseed meal was substituted for the first application of nitrate of 

 soda the average increase was only 10 bu. per acre. In a 2-year test on p«)or 

 sandy soil 120 lbs. of nitrate of soda per acre applied at planting time gave 

 an average increase of 3.9 bu. and when used as a side dre.ssing to corn 2A ft. 

 high an average increase of 9.3 bu. per acre. 



In 11 experiments conducted in various counties, the use of 100 lbs. of 

 nitrate (»f soda per acre, when the plants were 2J ft. high, gave the largest 

 average increase, 5.7 bu. per acre. When this application was not made until 

 the plants were ready to tassel the average increase was only 3.1 bu. In these 

 experiments 200 lbs. of uitrute of soda per acre, one-half applied when the 



