316 



The paper is illustrated with figures of nodules, and of 

 a tree covered with burrs. The whole article is well worth 

 studying by rubber-planters. 



Ma n u ri n g of Rubber. 



An article on manuring of rubber by Mr. Cowie ap- 

 pears in the India-Rubber Journal, Ap. 19, 1909, p. 463, 

 it is based on work done by Mr. Eckert of Ceylon, and on 

 experiments of Deli-Muda Sumatra. A manure containing 

 6 per cent of nitrogen and 5 per cent potash was found to 

 develop the foliage to such an extent that the trees were 

 broken down by the wind, but a mixture with 4 per cent 

 nitrogen and 15 per cent potash improved immensely the 

 trunks of the trees. 



The following manures are recommended. 



I. For land rich in nitrogen, with good leaf-growth. 



28 p.c. Muriate of potash 



25 p.c. Superphosphate 



20 p.c. Bone-meal 



17 p.c. Oil -cake 



10 p.c. Sulphate of Ammonia 



400 to 800 lbs. per acre. 



II. For land poor in nitrogen. 



20 p.c. Muriate potash 



30 p.c. Superphosphate 



10 p.c. Bone-meal 



14 p.c. Sulphate Ammonia 



16 p.c. Oil-cake 



400 to 700 lbs. per acre. 

 These manures can be sprinkled at a foot or a foot and 

 a half distant from the stem for each year of the plants 

 growth. ( By the way why do planters so constantly plant 

 their manures right up to the trunk of their trees! The 

 growing tips of the important roots are not there, they lie 

 at a distance from the tree in a regular ratio to the height 

 of the tree. One does not feed a horse by putting its corn 

 on its back, and waiting till it falls off and the horse can 

 pick it up off the ground, Ed.) To prevent the manure 

 being washed away by rain it is advisable to lightly pick it 

 in or to dig a trench round the tree and cover it in with 

 surface soil. 



Animals Associated with Rubber. 



This is the title of a Ceylon circular by Mr. E. Green, 

 who describes a number of insects attacking the rubber tree 



