MANURING OF CONTINUOUS CROPS 145 



Table classifying manures into : — 



ACID \ ALKALINE NEUTRAL 



♦Superphosphates Basic Slag *Nitrate of Soda 

 ♦Dissolved Bones Nitrolim Kainit 



♦Dissolved Guano *Muriate of Potash 



Sulphate of Anunonia ♦Sulphate of Potash 



Potash Salts 

 Bone Meal 

 Rock Phosphate 



In the above table the manures indicated by * are 

 soluble manures, that is, quick-acting. The rest are 

 less soluble and slow-acting. Nitrate of soda is 

 extremely quick-acting and should on any class of soil 

 or crop be used when it is necessary for any reason 

 for an early bite of green food, or when attacked by 

 pests, or in very dry weather. 



Sulphate of ammonia is much less soluble than 

 nitrate, therefore slower-acting and more suitable for 

 autumn application than the latter. Nitrolim occupies 

 a position intermediate between the two. This manure 

 should never be applied direct to a growing crop, as it 

 has a tendency to bum the foliage. It should be 

 worked into the land during cultivation. 



The solubihty or otherwise of a manure is of great 

 importance, as, in districts of heavy rainfall, a soluble 

 manure appUed in autumn will result in loss. This 

 loss will be most marked in mountainous districts or 

 soils of free drainage. For this reason in such districts, 

 other things being equal, preference in the use of 

 phosphatic manures should be given to bone meal, 

 basic slag, or ground rock phosphate. The last is the 

 cheapest form of phosphate, and will only give good 

 results in districts of fairly heavy rainfall, especially if 

 the soil be fairly acid, e.g. peaty or moory soil short 

 of lime. 



