590 



EXPERIMENT STATION RECORD. 



Experiments on the manuring of oats in 1895, R. P. Wright 



{Glasgow and West of Scotland Technical College, Agl. Dept. Rpis. 1895, 

 pp. 33-41). — Cooperative experiments were made on 15 farms, 12 

 tweutietb-acre plats differently fertilized being used in each case. 

 Tables are given showing the kinds and amounts of fertilizers applied, 

 location and soil of the farms, and yield per acre of oats and straw from 

 each plat. The effects of the different combinations are discussed 

 separately. 



The following table shows the average yields of grain and straw and 

 the increase over un manured plats for each fertilizer. 



Results of experiments with various fertilizers on oats. 



Amount 

 of fertil- 

 izer per 

 acre, 



Yield per acre. 



Grain. 



Straw. 



Increase in yield 



per acre over un- 



manured plats. 



Grain. Straw, 



TJnmanured ' 



Xitrate of soda 



Snlpliate of ammonia. 



Superphosphate 



Muriate of potash 



Kainit 



Nitrate of soda 



Muriate of potash 



Nitrate of soda 



Superphosphate 



Nitrate of soda 



Superphosphate 



Muriate of potash 



Sulphate of ammonia. 



Superphosphate 



Sulphate of ammonia. 



Superphosphate 



Muriate of ])otash 



Barnyard manure 



Pounds. 



112 



85 



224 



112 



386 



112 



112 



112 



224 



112 



224 



112 



85 



224 



85 



224 



112 



22, 400 



Pounds. 

 1,358 

 1,473 

 1, 683 

 1,657 

 1, 622 

 1,712 



\ 1, 595 

 \ 1, 763 



1,716 



1,812 



1,891 

 1,963 



Pounds. 

 2,654 

 3,000 

 3,110 

 2,859 

 2,883 

 3,032 



2,994 

 3,159 



3,141 



3,017 



3,139 

 3,603 



Pounds. 



Pounds. 



115 

 325 

 299 

 264 

 354 



237 

 405 



358 



454 



533 

 2632 



346 



456 

 205 

 229 

 378 

 340 



505 



485 



2 678 



'Average of 2 plats on each farm. 



^Compared with the average of the un manured plats on the 7 farms only, on which barnyard manure 

 ■wasapplied. This is 1,331 lbs. grain and 2,925 lbs. straw per acre. 



The author gives the following conclusions: 



"(1) Even in adverse seasons the produce of the oat crop can be largely increased 

 by suitable applications of manures. 



"(2) Even at the present low value of the oat crop, manures, judiciously applied 

 to it, will give a A-ery profitable return. 



"(3) Not only can the total produce be largely increased by manuring, but the 

 proportion of straw to grain can be considerably modified. 



"(4) The date of ripening and of harvest can be either hastened or retarded by 

 the employment of particular manures. 



" (5) Potassic manures applied alone act effectively in a year of drought, but tend 

 to retard ripening. 



"(6) Superphosphate gives profitable returns, whether applied alone or in combi- 

 nation with other manures. It hastens ripening and increases the proportion of 

 grain. 



"(7) Nitrogenous manures, such as nitrate of soda and sulphate of ammonia, 

 applied alone, retard ripening, but give large and profitable, though rather irregular, 

 increases of crop. 



"(8) These nitrogenous manures are more uniform and more reliable in their 

 action when applied with a soluble phosphatic manure, and give, as a rule, larger, 

 more profitable, and earlier crops when applied with superphosphate. 



