Fineness 



Some manures are of slow action because they 

 are too coarsely ground. This is the case, among 



3. Different Fineness: same Solubility. . 



Same kind of manure and same quality under a different form. 



During crop. 



Coarse manure. 

 Feeble growth. 



Very fine manure. 

 Vigorous growth. 



The square and the small circles show the manure particles 

 and the black points inside the circles and the square the 

 fertilising matter contained in them. 



Only a few particles of the 

 manure have been reached 

 and absorbed by the roots. 



Here all the manurial con- 

 stituents have been ab- 

 sorbed. 



others, with certain slags, while the same slags 

 finely ground are of comparatively rapid action. 



That is why in sowing slag care must be taken 

 to prevent its being blowTi away by the wind by 

 mixing it with other manures to which it can 

 adhere, or with some neutral matter (sand or saw- 

 dust), because the finest particles, that is those which 

 would fly the furthest, are the best. Sometimes one 



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