50 Maine Agricultural Experiment Station. 1919. 



Diagram of Clover Soil Test Experiment igiS. Series B. 



The top number above the * is the plot number. The numbers con- 

 nected by - show the fertilizer formula, applied at the rate of 750 

 pounds per acre. The letters N, P and K indicate the parts of the 

 triangle where ammonia, available phosphoric acid and potash are re- 

 pcctivcly at their maximum amounts. The numbers below the * give 

 the yield in tons per acre of field cured clover. The arrangement of 

 the plots in the field is shown by the diagram on page 









N 















Highest Ammonia 













51 















20-0-0 















l.*66 



56 



67 













16-4-0 

 * 



16-0-4 











61 



1.00 



68 



1.14 



83 









12-8-0 



12-4-4 





12-0-8 









* 



* 





* 







57 



1.58 



.86 



73 



85 



1.36 



54 





8-12-0 



1 



8-8-4 



8-4-8 



8-0 





* 





* 



* 





* 



64 



1.38 



81 



1.26 



66 



1.02 



74 



.74 



62 



4-16-0 





4-12-4 



4-8-8 





4-4-12 



4-0-16 



* 





* 



* 





* 



* 



1.14 



88 



76 



1.60 



1.58 



52 



87 



1.28 



1.28 



82 75 



0-20-0 



0-16-4 





0-12-8 



0-8-12 





0-4-16 0-0-20 



* 



* 





* 



* 





* * 



1.10 



1.52 





1.76 



1.06 





.98 .64 



P 













K 



Highest Phos- 

 phoric Acid 













Highest Pot- 

 ash 









Check Plots 







53 



58 





65 



72 





77 84 



0-0-0 



0-0-0 





0-0-0 



0-0-0 





0-0-0 0-0-0 



.96 .52 1.22 .94 .88 .62 



Special Formulas 



55 



71 



63 



78 



86 



5-8-7 



4-8-10 



4-8 J -8 



4 2 -8-8 



4 3 -8-8 



* 



* 



* 



* 



* 



1.02 



1.36 



.94 



.58 



1.16 



^Phosphoric acid in form of floats. 2 Ammonia in form of dried 

 blood. 3 Ammonia in form of tankage. 



