204 



NITROGEN, PHOSPHORUS AND POTASSIUM 



I 



bonate of lime and moisture, the muriate may give as good results 

 as the sulfate. 



Kainit is much used in the South. 



Fig. 135. 



Fig. 136. 



1 



^^ 



1 





'k 



SBii^..^^^ 



'^**** 



^plit 



^Hj 



^ ^ ^^^ 



' 





- ' *^ 



«S%>,:|JH|H 



'5 



* 







Fig. 135.: — For corn (in a pot test) this peat soil responded to phosphate treatment. 



O, no treatment; A^, nitrogen fertilizer; P, phosphate treatment; K, potash; PK, 



phosphate and potash. (See Figure 136.) 



Fig. 136. — For cabbage, potash fertilizer gave the greatest response. Same soil as in 



Figure 135. ^, response to phosphate; ^, response to potash. 



Wood ashes are excellent for acid, peat soils. From one to two 

 tons per acre is a common application.'' No mixture of commercial 

 fertilizers gives the results on acid marsh soils as do ashes. 



^ When containing 30 to 40 per cent moisture. ^ - 



