EXPERIMENTS WITH PERMANENT PASTURES 



13 



Fig. 5. — The addition of nitrogen to a complete mineral treatment increased the yield 

 but did not improve the character of the vegetation. (Exp. A, Plot 4 — L, P, K, N.) 

 Upper — 1921, before the application of fertilizer. 

 Middle — 1922, one year after application. 

 Lower — 1923, two years after application. 



