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MASS. EXPERIMENT STATION BULLETIN 281 



Fift. 4. — Lime, phosphorus and potash were more effective than lime alone in changing 

 the character of the vegetation. (Exp. A. Plot 5 — L, P, K.) 

 Upper 1921, before the application of fertilizer. 

 Middle— 1922, one year after application. 

 Lower — 1923, two years after application. 



