. Agricultural news. Agriculture -- West Indies; Plant diseases -- West Indies. A FORTNIGHTLY REVIEW OF THE IMPERIAL DEPARTMENT OF AGRICULTURE FOR THE WEST INDIES. NEW ^ BOTA^ OAiti] Vol. IX. No. 219. BARBADOS, SEPTEMBER 17, 1910. Pbicx lei. CONTENTS. Page. P.\GE. Blackbird of Diiiiiinicii, The 297 Book Shelf 299 Canadiun Kxhiliitious, Trinidad. St. Vincent and and the 291 Cotton Notes :— Cotton the West Indies 294 Cott'in-Growing in Malta 294 West Indian 294 Departmental Reports ... 295 Felling Trees, A new Method for 297 Fruit Exportation from Natal 292 Fungus
. Agricultural news. Agriculture -- West Indies; Plant diseases -- West Indies. A FORTNIGHTLY REVIEW OF THE IMPERIAL DEPARTMENT OF AGRICULTURE FOR THE WEST INDIES. NEW ^ BOTA^ OAiti] Vol. IX. No. 219. BARBADOS, SEPTEMBER 17, 1910. Pbicx lei. CONTENTS. Page. P.\GE. Blackbird of Diiiiiinicii, The 297 Book Shelf 299 Canadiun Kxhiliitious, Trinidad. St. Vincent and and the 291 Cotton Notes :— Cotton the West Indies 294 Cott'in-Growing in Malta 294 West Indian 294 Departmental Reports ... 295 Felling Trees, A new Method for 297 Fruit Exportation from Natal 292 Fungus Notes :— Some Diseases of Rub- ber Trees, Part I ... 302 Gleanings .300 Guayule Rubber 294 Indian Agriculture, Im- provements in 293 Insect Notes:— House-Flies and Disease The Brussels Congress of Entomology .laffii Orange, The Maintenance of Soil I'm- ductivity. The Market Reports Notes and Comments ... Para Rublier Tree. Tap- ping nf Publication^ of the Imperial Department of Agriculture Rubber Industry of Brazil Sesljania Aculeata as a Green Manure Students' Corner Sugar Trade Laboratory, New York Tradean<l Commerce of the Seychelles, 1909 ... Vanilla, PnMluctioii of ... 298 298 292 289 .3(14 29ti 303 29(i 297 297 .301 291 297 295 The Maintenance of Soil Productivity. *X most parts of the world, agricultural practice has reached the stage of full recog- i!iition, in individual cases, of the necessity of keeping up the fertility of the soil by approved methods. An imderstanding of the needs of the soil has been gained, so that there is a decreasing tendency to take whatever this may yield, without treating it in ways which will prevent its exhaustion. This phase of the methods of agricultural production is naturally of the greatest importance, especially as it enables the area concerned in that production to be conserved eflfectively. The principles of the maintenance of soil produc- tivity are, however, usually employed in a narrow way only. They are considered to
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