MANURING 



68 



and so make their application more costly. Mixing kainit 

 or other potash salts with other artificial manures, if not 

 spread immediately, will give a mixture which soon 

 becomes a hard solid mass, which must be broken up 

 before application. To remember what manures can or 

 cannot be mixed for any length of time, shortly, or not at 

 all, before spreading on land, cannot be expected of any 

 one who is not well up in the chemistry of manures. A 

 diagram is reproduced on this page which readily and 



Superphosphate 



Basic Slag or 

 Thomas' Phos- 

 phate 



Ammomum 

 Sulphate 



Potash Salts 



Farmyard 

 Manure and 

 Guano 



Kainit 



Chile Saltpetre or Sodium Nitrate 

 Fig. 17. — Dr.'.Geehen's manuiial diagram; 



simply shows what may or may not be mixed. It is taken 

 from an article by Dr. Geehen in the Australian Agrir 

 culturist, republished by the Queensland Agricultural 

 Journal, and by the author as editor of the Trinidad 

 Bulletin, 1904-5. 



Those manures joined by the thick lines must never be 

 mixed before using. Those joined by the double line 

 may be mixed immediately before spreading, and those by 

 the single line can be mixed together at any time. Two 

 other single lines might run between the base point and 

 the right and left upper angles, but these were left out in 

 making the " electro." 



