No. 7. DEPARTMENT OF AGRICULTURE. 681 



Average Coniijosition and Guaranty Compared — Continued. 



Phosphoric acid: 



Total. 



Available, .. 



Potash. 



Nitrogen, 



Fall. 1907. 



Phosphoric acid: 



Total 



Available, . . . 



Potash 



Nitrogen, 



Spring, 1908. 



Phosphoric acid: 



Total, 



Available, ... 



Potash. 



Nitrogen 



Fall. 1908. 



u 



