594 



STATE BOARD OF AGRICULTURE. 



Data and Discussions. 



TABLE 1.— CHEMICAL AN.y.YSES OF THE SOILS. 

 (Results expressed as pounds per 2,000,000 pounds of soil.) 



TABLE 2.— QUANTITIES OF SILICA IN SOIL EXTRACTS IN PARTS PER MILLION ON SOILS. 



(a) '1st leachin8:s^2 dav period, 

 (b) 2nd teachings — 15 day period. 



The SiOo of the alkaline soils appears to be more soluble than that of 

 the acid soils. That N/5 HCl also dissolves more SiO, from alka- 

 line than from acid soils is shown in Table 1, and in a previous publica- 

 tion, Spurway (30). Other significant points in respect to SiOz are, 

 hydrated lime greatly depresses its solubility, and the solubility of this 

 component is increased by soluble phosphates. All the other treatments 

 with but few exceptions tend to depress the solubility of SiOg in these 

 soils. 



