The Manuhing of Vineyards. 160 



The separate fertilizers used sliould not contain more than one 

 plant-food each. The following are suitable: — 



Tor nitrogen: Blood-meal or sulphate of ammonia. 



For phosphoric oxide : Superphosphate or basic slag (prefer- 

 ably superphosphate, because slag contains free lime, 

 which may have an effect of its own). 



For potash : Sulphate or muriate of potash. 



The quantiti^ applied per plot Avill, of course, depend upon the 

 size of the plots. Assuming the vines are planted 5 feet apart, and 

 each plot contains 96 or lOU vines, the quantities applied should be : 



Nitrogen: 20 lb. blood-meal (12 per cent.) or 12 lb. sulphate 

 of ammonia (20 per cent.). 



Phosphoric oxide : 18 lb. superphosphate (20 per cent.) or 

 24 lb. basic slag (15 per cent.). 



Potash : 5 lb. sulphate or muriate of potash (50 per cent.). 



Such an experiment is capable of a large number of variations. 

 If the plots are large enough, one-half of each plot might receive a 

 dressing of lime in order to determine the beneficial effect of liming. 

 Or the entire series might be duplicated and lime added to each plot. 

 Green manure could be used as a source of nitrogen and compared 

 with blood or sulphate of ammonia, but then extra plots will be 

 needed. The proportions of the plant-foods added might be varied. 

 An extra plot. No. (8), could be added with NPK, using twice as 

 much phosphoric oxide as in the other plots. Or it may be found 

 that results equally as good as that of Plot (5) can be obtained on 

 certain soils by cutting down either the nitrogen or potash, or both, 

 to half quantities. 



Whatever the plan of the experiment, it should be carried on for 

 a number of years. The results of the first year or two will indicate 

 the nature of the immediate requirements of the soil, but after a 

 few years these may be quite diherent. 



In conclusion the writers wish to acknowledge the use made of 

 Dr. A. I. Perold's publication on "The Manuring of Vineyards" 

 (1911), which is now out of print. In fact, the present article was 

 undertaken with a view to replacing Dr. PerokVs original publication. 



Fruit for Japan: A Prohibition. 



The Japanese Government has issued an Ordinance by which the 

 importation from South Africa (and other countries) into Japan of 

 apples, pears, quinces, peaches, plums, apricots, and nuts, and 

 materials used for packing them, is prohibited, the object of the 

 Government being to prevent the introduction into Japan of the 

 codling-motii. 



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