336 EXPERIMENT STATION RECOED. 



it (Joes oats and corn. Cowpeas were next to the grain sorghums in this respect. 

 Oats removed more of the moisture from the soil before wilting than any other 

 plants grown, cowpeas ranked next to oats, com third, Kafir corn fourth, while 

 milo maize left more of the moisture in the soil at its wilting point than any of 

 the other crops. 



From the wilting coefficient for the plants as determined, it is shown that 

 the drought-resistant character of the grain sorghums is not directly due to 

 their ability to use the soil moisture down to the lowest extent. 



When two kinds of plants were grown together in the same soil mass, corn 

 died before oats, Kafir corn, and milo maize, and in one case it died before 

 cowpeas. Kafir corn grown in combination with other crops was in every case 

 the last to die. 



In experiments regarding the depth of plowing, it is noted that " soils of a 

 silty character were plowed to a depth of 5, 10, and 15 in. Just previous to the 

 plowing each year samples were taken to a depth of 15 in. in each series. In 

 each case for 3 successive years it was found that the soils which were plowed 

 to a depth of 15 in. were just as hard and compact in structure as those which 

 were plowed to a depth of 5 in. There was no residual effect upon the soil from 

 deep plowing. The effect entirely disappeared at the end of the first season. 

 It may be further stated that in plowing the second and third years the 

 5-in. plowed plats were just as easily turned as were the 10 and 15-in. plowed 

 plats. This leads us to believe that extra deep plowing, that is. over 7 in., is 

 not profitable on this type of soil." 



It is noted as results of trials, that Kafir corn should be planted about April 

 10 in the southern part of Oklahoma and about May 20 in the northern part. 

 Feterita and milo maize may be planted about ten days later than Kafir com. 



The crops on the experimental sugar-cane fields, 1913, J. B. Harrison, 

 C. K. Bancroft, and R. Ward {Jour. Bd. Agr. Brit. Guiana, 8 {191^), No. 1-2, 

 pp. 45-57). — This article gives results of variety, manurial, and cultural tests 

 with sugar cane. 



In a study of the effect of manures, the mean returns on 39 varieties as ratoon 

 canes with normal and high manurings, 300 lbs. and 450 lbs. of sulphate of am- 

 monia per acre respectively, were 19 and 22.5 tons per acre respectively, as 

 compared with 11.1 tons from the untreated area. Sulphate of ammonia is 

 noted as a better source of nitrogen than nitrate of lime, niti'olime, or nitrate 

 of soda, the mean annual increases for four years by the use of 60 lbs. of nitro- 

 gen in the various forms being 9.4, 6.7, 5.9, and 4 tons of cane per acre over 

 the untreated area. The use of dried blood is noted as being far from satis- 

 factory. 



It is shown that in normal seasons the addition to sulphate of ammonia of 

 sulphate of potash and supeuphosphates of lime actually reduced the yield. The 

 addition of phosphates to nitrogen fertilizers produced increased yields, but 

 these increases were not remunerative. Molasses in 100-. 200-. and 300-lb. rates 

 has given negative results with cane (E. S. R., 30, p. 822). No advantage was 

 shown by the partial sterilization of the soil by the application of chlorinated 

 lime, yields being lower this year on the treated plats. 



"Winter-wheat varieties for the eastern United States. C. E. Leighty ( V. 8. 

 Dept. Agr., Farmers' Bui. 616 {1914), pp. 14, figs. 6). — This deals principally 

 with the soft red and soft white winter wheats adatped to the eastem half of 

 the United States, and discusses the two transition zones, the one chiefly in 

 northern Iowa and southern Minnesota between the district which grows only 

 winter and that which grows only spring wheat; the other in southern Iowa, 

 southeastern Nebraska, eastern Kansas, central Oklahoma, and northern-cen- 



