Organic Manures 



be progressive and sustained. It is, therefore, a 

 slow manure, which will make its action felt for 

 many years, and from this it has partly got its 

 reputation. It is precisely this feature, however, 

 that should make it less valuable, because each unit 

 of fertilising matter can only be absorbed once by 

 the plants, and since all the units of the manure are 

 paid for in advance, one has to invest one's money 

 in the soil a long time before any returns are obtained 

 in crops. 



The proportions of the nitrogen and phosphoric 

 acid are very variable and are rarely well balanced. 

 Potash must always be added, and likewise nitrogen 

 and phosphoric acid. The manure should be applied 

 to root crops, preferably before winter. It should 

 not be used for pastures, because the nitrogen would 

 be wasted by the washing away of the organic 

 matter. 



The colour is blackish-brown, and its texture 

 renders it eminently suitable for all mixtures. 

 The makers of compound manures employ it 

 on a large scale. The mixture is very easy to 

 make, and would be a good one if it were not 

 too dear. 



The manure called Equalised Fish Guano has 

 received an addition of potash and soluble phosphoric 

 acid. 



Bat Guano. 



This guano, which forms another interesting 

 source of manure, comes from the dung, refuse, and 

 bodies of bats accumulated in caves since time 

 immemorial. It is sometimes found in great 



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