346 EXPERIMENT STATION RECORD. 



tions. Cotton-seed hull ashes and high-grade sulphate of potash 

 proved to be the most valuable sources of potash in these experiments. 

 Nitrate of potash, when used with au alkaline phosphate or with car- 

 bonate of potash and magnesia, gave good results. 



"Any attempt at classifying the various fertilizers used with refer- 

 ence to their superior fitness can not be otherwise than somewhat 

 arbitrary." The author makes the following classification: 



First class : 

 Nitrate of soda, cotton-seed hull ashes, castor pomace. 

 Nitrate of soda, cotton-seed hull ashes, cotton-seed meal. 

 Nitrate of potash, cotton-seed hull ashes, cotton-seed meal. 

 Nitrate of potash, carhonate of potash-maguesia, phosphatic slag. 



Second class : 

 Nitrate of soda, high-grade sulphate of potash, cotton-seed meal, dissolved bone- 

 black. 

 Nitrate of soda, high-grade sulphate of potash, linseed meal, dissolved boueblack. 

 Nitrate of soda, high-grade sulphate of potash, castor pomace, dissolved honeblack. 



Third class: 

 Nitrate of potash, potash-magnesia sulphate, cotton-seed meal, dissolved bone- 

 black. 

 Nitrate of potash, potash-magnesia sulphate, castor pomace, dissolved boueblack. 



The observations with barnyard manure are considered insufficient 

 in number to warrant conclusions. 



Experiments with wheat, 1896-97, G. E. Morrow and J. H. 

 Bone (Oklahoma Sta. Bui. 28, pp. 8). — Experiments were conducted to 

 ascertain the effects of time and rate of seeding and the effect of sub- 

 soiling. A comparison of 64 varieties was made on 83 plats, Results 

 are given in tables. 



In the variety tests the plats (usually one-fortieth of an acre in size) 

 were sown September 22 to 24, at the rate of 4 pecks per acre. The 

 average yield was 39.6 bu. per -acre, the yields ranging from 19.5 bu. to 

 57 bu. "The varieties giving largest yields were Fultz, Red Russian, 

 Fulcaster, Mealy, Dietz Longberry, Sibley New Golden, and Oregon 

 Swamp, but it is probable other things influenced the yield more than 

 did the variety." 



Wheat was sown at different dates from September 15 to November 16,. 

 and at the rate of 3, 4, 5, 6, and 8 pecks per acre. The largest yields 

 were obtained from the first sowing — September 15 — and generally the 

 best results were secured from sowing at the rate of 6 pecks of seed 

 per acre. 



A trial of subsoiling showed only a small effect on the yield. 



Loss by exposure of corn stover and teosinte, G. L. Holter 

 and J. Fields (Oklahoma Sta. Bui. 25, pp. 3, 4). — In order to learn 

 whether exposure to sun, rain, and wind caused a loss of nutritive 

 material analyses were made of samples of corn stover and teosinte 

 from the inside and outside of the shocks which had stood in the open 

 field all winter. The results were as follows : 



