ion 



Tdhlc IL Ejjccl of fcrlilizcrs, liinc, vcuhon black, 

 ])ijr<)(/(ill()l (tnd coiiniariii on crop yields in 

 Cecil cluij soil. Crops (jrowu in Ihe green- 

 house, l«ii;M914. 



KIND OF tri:atmi;nt 



IS o 

 1,^ _, 





(-heck, no treafinent 

 Nitrate of Soda 



Kuinit , 



Acid Plio.si)hale 



Nitrate. Acid Phosphate and 



Kainit 

 Calcium Carhonatc 

 Carhon Bhick 

 Pyroi^allol 

 P\ Togallol 

 Pyrogaiiol 

 Pyrogallol 

 Couniarin 

 Couinarin 

 Couniarin 



The results obtained in this test are rather peculiar, 

 and are dit!icult to explain. None of the treatments, 

 excepting the acid phosphate and the complete ferti- 

 lizer, was beneficial to oats. The differences in the corn 

 yields from the several treatments are not great enough 

 to warrant any conclusions. 



One striking point brought out in this test was the 

 very marked effect of phosphate on the growth and 

 s tooling of oats during the first few weeks of growth of 

 the plants. Had the test been terminale(l at the 

 end of the first month, the results obtained, using air 

 dry weight as a criterion, would have shown that phos- 

 phate was even more beneficial than was the complete 

 fertilizer. The plants on the |)hosphale-treated ])ot 

 made a very vigorous early growth, and the amount of 

 stooling was greatly in excess of that on any other i)ot. 

 After about the first month, however, the plants began 

 to turn yellow and show dead leaves at the bottom. 

 On the other hand, the plants on the pot with complete 

 fertilizer continued to grow rapidly and never lost 

 color. The great need of phosphate is indicated by the 



