- 123 - 



any material increase in the crop. Evidently the 

 lack of nitrates in these plats can not account for the 

 low yields. But the moisture ran low, which was doubtless 

 one of the causes, ot the cause, for the low yields. 

 It appears, therefore, that the lack of nitrates in the 

 soil was probably a limiting factor, at least, in the 

 amount of nitrogen accumulated by the plants in some 

 cases while in others no such effect occurred from this 

 cause . 



A very interesting feature of the tabl^ (XXXII ) 

 is the variation of NO3 in the checks. Is ife improbable 

 that plat 7, for instance, is too low to supply the opti- 

 mum amount of nitrates to the plant if the moisture and 

 other conditions were favorable? V.Tiat effect would this 

 have on the composition of the planfe? Sodium nitrate 

 applied to timothy on the Mitchel Farm gave a decided 

 increase in Yield (Cornell Bui. 241, 7) 



The ^^^4 content in the soil was about the same 

 throughout the season, and is but slightly lower in the 

 corn than at the ends. There was but little effect on the 

 yields. This corresponds with the fact that acid phos- 

 phate gives but slightly increased yields on the Mitchel 



Farm . T 



The Potassium (K ) in the soil seems to show 



a slight tendency to lower on the ends with the moisture. 



