34 a 



EXPERIMENT STATION. 



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an. 



CoMPARisox OF Different Phosphates. 



On one of our fields we have had under comparison since 

 1897 ten different materials that are used as sources of phos- 

 phoric acid. Each j^lot has received aunuallv a liberal appli- 

 cation of nitrogen and potash in highly available forms. The 

 different phosphates are used in such quantities as to supply 

 equal phosphoric acid to each plot. There are 3 check j)lots 

 which receive no phosphates. 



This year a very good crop of rye was plowed under in May. 

 The field received an application of hydrated lime at the rate 

 of 1 ton per acre. 



The crop this year was Longfellow corn, planted May 28 

 and cut and stooked September 26, on which date it was fairly 

 well matured. The following table shows the average height 

 of the plants on the different plots on July 10 : — 



The above figures make it very apparent which phosphates 

 are the more quickly available. 



The following table shows the yield per acre on the dift'erent 

 plots : — 



