236 EXPERIMENT STATION RECORD. [Vol. 37 



The uses of soy beans for human and animal food and for such special 

 products as soy-bean meal and soy-bean oil are discussed. Charts are presented 

 showing the relative value of soy beans and several common food materials. 



Sudan grass, B. A. Madson and P. B. Kennedy {California Sta. Bui. £77 

 {1911), pp. 195-22^, figs. 5). — The field practices and cultural methods em- 

 ployed in the production of Sudan grass, both for hay and seed, in California 

 are discussed. Date, rate, and method-of-seeding tests for hay production and 

 method-of-seeding tests for seed production, carried on in cooperation with the 

 U. S. Department of Agriculture, are for 1913. 1914, 1915, and 1916. 



The average yield of cured hay varied from 1.8 to 5.9 tons per acre on dry 

 land and 3.9 to 6.7 tons on irrigated land. The average yield of seed is esti- 

 mated at from 600 to 800 lbs. per acre. For hay production seedings of from 

 10 to 15 lbs. in rather narrow rows (18 in.) seemed to give the best results, 

 although heavier seedings sown broadcast, drilled, or in wider rows gave good 

 results, depending largely upon the available moisture supply. Seeding should 

 not be done until all danger of frost is passed and the soil has become thor- 

 oughly warm. From 75 to 80 days after seeding are required to secure the 

 first cutting, about 45 days more for the second, and 50 days more for the 

 third. A seed crop can be produced in from 95 to 100 days. 



Analyses are reported of various hay crops for a comparison with Sudan 

 grass and indicate that due to the large i/iroduction of dry matter (6.367.7 

 lbs. per acre for a 3-year average) this crop is superior to the usual cereal 

 and grass hays in the amount of food constituents produced per acre, although 

 it can not compete with alfalfa. 



It is recommended that Sudan gra.ss be grown in rotation following a .spring 

 crop, such as grain or spring pasture, which could be removed by the first to 

 the middle of July. 



The method for distinguishing the seed of Johnson grass and Sudan grass 

 devised by Hillman (E. S. R.. 35, p. 834), is noted. 



Report of the plant breeder, 11. K. Cowgim. (Rpt. Bd. Cnmrs. Apr. /'. R., J, 

 {19U-16), pp. 22-SS; 5 {1915-16), pp. 16-20, 21-S4).— This reports the continu- 

 tion of work at the Pot-to Rico Insular Station with sugar cane (E. S. R., 

 33, p. 532) for the years of 1914-15 and 1915-16. 



The propagation of seedling canes and a rigid selection and careful choice 

 of parent varieties has been continued. Several attempts at cross-pollinating 

 cane varieties are reported with a considerable degree of success. The methods 

 employed in 1914-15 Included planting a pollen-sterile variety to the leeward 

 of a pollen-fertile variety which blooms at the same time and tying together 

 the tassels of the varieties to be crossed before the florets of either had uptnied. 

 The pollen-sterile variety used in the first case was the Otaheite and the pollen- 

 fertile parent B 347. In the second case Crystallna (the pollen-sterile parent) 

 and D 109 were the varieties used. Sixteen hundred seedlings were produced 

 by the latter method and 1,745 seedlings obtained from open cross-pollination 

 were planted In the field in 1915-1916. Of the last-named group SO plants were 

 selected as of superior quality. The results of the crosses and the value of 

 different varieties as parents are discussed. 



A list of the cane varieties grown most extensively on the Island is given 

 and their relative Importance discussed. Striped cane, Otaheite, and Crysta- 

 llna take rank in the order named with regard to the area occupied by each. 

 The value of numerous imported varieties, as indicated by actual field observa- 

 tions, is also discussed. 



Tests of 25 varieties of cane are reported for 1914-15, showing the yields of 

 plant cane and first and second ratoons, with an analysis of the juice for the 



