64 FERTILIZERS 



FERTILIZING VALUE OF STRAW, STABLE MANURE, 

 ORANGE CULLS, AND CERTAIN LEGUMES, f 



101. N. P.A. POT.* 



JPea vine hay 3.00 $12.00 



IVetchhay 2.55 10.20 



Burr clover hay 2.68 10.72 



Alfalfa hay 2.19 1.51 1.68 11.37 



Wheat straw 0.59 0.12 0.51 3.12 



Stable manure 0.50 0.25 0.50 2.87 



Orange culls 0.18 0.12 0.21 1.10 



*(Nitrogen @ $4.00 per unit. Phos. acid @ $1.00 

 per unit and potash @ $1.25 per unit.) 



fThe value of the above materials for humus is 

 probably equal to, or greater than their fertility 

 value as judged by the results obtained from their 

 use. 



tit is assumed in the table that the pea, vetch and 

 burr clover were raised as a cover catch crop in the 

 orchard, and that this nitrogen is all gain, which 

 fact is not yet established beyond doubt. Their 

 phosphoric acid and potash are not reported, as 

 what they take of these from the soil is returned 

 with them. 



