EXPERIMENT STATION BULLETINS. 381 



COMMERCIAL FEEDING STUFFS 



Regular Bulletin No. 292 



BY ANDREW J. PATTEN, O. B. WINTER, M. L. GRETTENBERGER, P. o'mEARA 



CHEMICAL SECTION 



This bulletin contains the results of the inspection of commercial feeding 

 stuffs during the period from September 1920 to June 1921. During this 

 time 529 samples Avere collected and analyzed. This is, by far, the smallest 

 number of samples that have ever been collected during a similar period, 

 since the inspection has been carried on by the Chemical Section of the 

 Michigan Agricultural Experiment Station under the supervision of the 

 State Board of Agriculture. The unusual economic conditions that prevailed 

 during the past nine months caused a tremendous falling off in the com- 

 mercial feed business. The movement of mixed feeds, during the winter 

 months especially, was extremely light. On the other hand, the sharp de- 

 cline in the price of cottonseed meal, that occurred in the early winter stim- 

 ulated its demand and the movement of this concentrate was greater than 

 ever before. Furthermore, the quality of the cottonseed meal shipped into 

 the State during the past winter was far superior to that of former years, 

 the great bulk of the shipments being 43% protein meal. 



The inspection of commercial feeding stuffs has been conducted by the 

 chemical section of the Experiment Station since January 1916. The effect 

 of this inpsection upon the quality of the feeds sold in the State is clearly 

 demonstrated in the following table, which shows the percentage of samples 

 not equal to guarantee for both years. 



Year ending July 1 1916 1921 



Deficient in protein 15.0% 5.8% 



Deficient in crude fat 11.5 2.8 



Excess of crude fiber 9.9 2.4 



More striking still is the comparison of the inspection results covering 

 cottonseed meal for the same years as shown in the following table: 



Year ending July 1 1916 1921 



Deficient in protein 51 .0% 4.7% 



Deficient in crude fat 6.2 1.0 



Excess of crude fiber 39 . 6 2.3 



