204 SOILS AND FERTILIZERS 



stand of grain were obtained. The ashes of strand 

 plants and weeds are extremely variable in composition. 



261. Wool Washings and Waste. — The washings 

 from wool contain sufficient potash to make this 

 material valuable as a fertilizer. In wool there is a 

 high per cent, of potash, which is soluble, and readily 

 removed in the washings. Wool waste may contain 

 from 1 to 5 per cent, of potash and from 4 to 7 per 

 cent, of nitrogen in somewhat inert forms. 



