Figiirf 7. Fil'tv i'ouiuis of iSitrogen Per Acre on the I^ei't, 

 One Hundred Pounds of Nitrogen on the Right. 



M' 



■t • 



a^-^-.f^, 



Figure 8. Invasion of Ked (Hover in Bromegrass Plots I'ertilized at the Rate 

 of Fifty Pounds of Nitrogen Per Acre Per Year. 



