Manures in General 



3rd. Different manures require to be used at 

 different depths in the soil. For example, it is not 

 good to plough or harrow in Chili nitrate, while 

 slag or kainite generally require to be well incor- 

 porated with arable soil. Hence one can easily 

 use simple manures at the depth which suits them 

 best, whilst in using compound manures this is not 

 possible. Being mixed, some will be too deep, 

 and others not deep enough. 



4th. Different manures need to be applied at 

 different seasons. One would not use nitrate in 

 November, because it would be irretrievably lost, 

 though slag could very well be used on arable at 

 this season without any such risk. Each manure 

 has its corresponding time for application. With 

 compound manures, in which of course all the 

 elements are applied at once, sometimes one or 

 more of them is not used at the time which suits it 

 best. 



5th. Simple manures used alone are not subject 

 to the losses which arise as a result of certain 

 mixtures in chemical manures, such as loss of 

 ammonia [NH3]. 



6th. Being simple and supplied straight from 

 the source, they are less subject to adulteration. 



Compound manures, again, are generally too 

 dear. The reason why is not difficult to understand. 

 Their price ordinarily includes — 



1. The cost to the producer of each of the simple 

 manures of which the mixture is compounded. 



2. The cost of transport from the producer to 

 the manufacturer of the mixture. 



3. Handling and cost of storage here. 



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