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(B) When sufficient farmyard manure is available 

 to apply, say, 3 tons per acre, a series of experiment 

 plots should be arranged as follows (it is again under- 

 stood that the soil is rich in potash and that, therefore, 

 no experiments with applying potash have to be 

 made) : 



In the plots 3 and 6 the basic phosphate has to be 

 applied first and the farmyard manure and the sulphate 

 of ammonia six weeks later. 



The manner in which the manures are applied is 

 not without importance. Artificial manures are often 

 mixed with dry earth before application, which allows 

 them to be more easily and more equally distributed 

 over the land. They may also be incorporated in the 

 soil by superficial hoeing ; but this is not so necessary 

 with potash and phosphorus manures as with ammonia- 

 containing manures. Organic manures will always 

 have a much better effect when incorporated into the 

 soil by means of the hoe or the fork than when left 

 on the surface ; this is especially the case with farmyard 

 manure, which contains a large proportion of compounds 

 of ammonia. 



As regards the time of the year, the best effect will 

 generally be obtained if the manure is given when the 

 dry season is just over and the first few rains are 

 bringing new life to the root-systems. This time of 

 the year may be compared with our spring-time ; the 

 whole tree is in a state of great activity, and new 

 roots, new twigs, new leaves are formed. In some 



