An. Rpt. Office of Experiment Stations. 1905. 



Plate III. 



I'ula.-sium. Nitrugcii and plH)si)honi.s. Nitrogen unil ]piii!i»iuni. 



Fig. 1.— Effect of Potassium on Yield of Corn in Peaty Swamp Soil in Illinois. 



Fig. 2.— Illinois Station Agronomy Building. 



