INSPECTION OF COMMERCIAL FERTILIZERS 11 



Mixing Efficiency Table. 



Summary of Data on Acid and Basic Fertilizers. 



AVERAGE ANALYSIS OF MIXED FERTILIZERS.' 



* Does not include fertilizers mixed for special orders. 



Although there was a greater tonnage of double- and multiple-strength fer- 

 tilizers sold in 1936 than in the preceding year, the average analysis found is 

 lower than in 1935. This is due to the fact that the manufacturers allowed a 

 much more liberal average over-run in all three plant foods in 1935 than in 

 1936. Therefore, while the guaranteed average analysis for 1936 is higher, the 

 actual average analysis is lower than for 1935. The above table shows that 

 the trend continues toward the manufacture of higher grade fertilizers. 



