CHAPTER IV. 

 PARA RUBBER SOILS AND MANURING. 



The mechanical and chemical composition of rubber soils — Peradeniya — 

 Henaratgoda — Udugama — The soils and rubber-planting in various 

 parts of Ceylon — Carruthers and Bamber on rubber land and soils 

 in the Federated Malay States — Cabooky, alluvial, and swampy soils 

 in Ceylon — Treatment of swampy soils — Illustrations showing Para 

 rubber on Passara Group estate, Passara ; young and old rubber on 

 Madampe estate, Kakwana, Arampola estate, Kurunegala; Para 

 rubber and tea on Nikakotua estate. Mat ale ; Para rubber on 

 Hunugalla estate, Kegalla — The. Kelani, Kegalla, Kalutara, Galle, 

 Mat ale, Pussellawa, Ratnapura, Ambagamuwa, Kurmiegala, and 

 Passara Districts — Principles of rubber-manuring — Manuring to 

 increase the latex— Para rubber trees — Artificial manures for rubber 

 soils — How to apply readily soluble and stable manures — Forking, 

 trenching, and root growth — Illustration showing trench-manuring for 

 young rubber — Constituents in woody stem, twigs, fresh, and dried 

 leaves — Composition of artificial manures obtainable locally — Green 

 manuring for Para rubber trees — Limit 6 to 8 years — Suitable 

 herbaceous plants and their composition — Illustration showing young 

 Para rubber and crotalaria striata — Tree forms, Dadaps and 

 Albizzias — Organic matter obtainable. 



Para Rubber Soils and Manuring. 

 It has been conclusively shown that Para rubber can be grown in 

 soils which are relatively poor in physical and chemical properties, 

 and the following analyses of soils in different parts of Ceylon* will 

 illustrate the composition of those which have given good results 

 with Para rubber : — 



Rubber Soils at 

 Henaratgoda. 

 Peradeniya 1 2 



• r Soils. Soil under Soil from 



Mechanical Udagama Old Pasture 



Composition. Swamps. Rubber. Land. 

 Per cent. Per cent. Per cent. Per cent. 

 Fine soil passing 90 mesh . . 27-00 59-00 20-00 26-00 



Fine soil passing 60 mesh . . 20-00 36-00 28-00 28-00 



Medium soil passing 30 mesh 9-00 1-00 14-00 21-00 



* Circular of the R. B. G., Peradeniya, by Herbert Wright and A. Bruce, 

 Vol. III., No. G, July, l'JOJ. 



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