W6 SOILS: PROPERTIES AND MANAGEMENT 



3. 



Calcium oxide 

 Calcium hydrate 

 Wood ashes 

 Basic slag 

 Calcium cyanamid 

 Basic calcium 

 nitrate 



Calcium oxide 

 Calcium hydrate 

 Calcium carbonate 

 Wood ashes 

 Basic calcium 

 nitrates 



Calcium oxide 

 Calcium hydrate 

 Basic calcium 

 nitrate 



should not be 

 mixed with 



ammonium sul- 

 fate 



animal manures, 

 as tankage, 

 blood, and the 

 like 



nitrogenous 

 guanos 



. , , x , f soluble phos- 

 should not be , 



, . , { phates 

 mixed with £ , . , 



[ol any kind 



should not be 

 mixed with 

 (unless applied 

 immediately) 



' sodium nitrate 

 potassium chlo- 

 ride 

 kainit, and the 

 like 



Neither is it wise to allow moist acid phosphate to lie 

 in contact with large quantities of sodium nitrate, as 

 nitric acid may be slowly liberated by free sulfuric or 

 phosphoric acid. Also, large quantities of calcium cyana- 

 mid should not be mixed with acid phosphate because 

 of the lime contained in the former. If, however, the 

 ratio is not greater than one to ten, the results are bene- 

 ficial, since the reaction, without causing serious rever- 

 sion of the phosphate, generates enough heat to quickly 

 season the mixture. The fine and dry condition of the 

 cyanamid is also conducive to a good mechanical condi- 

 tion, and accounts for the fact that this material is in 

 such favor with manufacturers of mixed goods. 



