. Agricultural news. Agriculture -- West Indies; Plant diseases -- West Indies. A FORTNIGHTLY REVIEW OF THK IMPERIAL DEPARTMENT OF AGRICULTURE FOR THE WEST INDIES. NEW botat Vol. XI. No. 266. BARBADOS, JULY 6, 1912. Pbiob Id. CONTENTS. ^sericulture in St. Lucia, 1910 .. Bay f Embryo Cotton Notes :— Annual Report of the British Cotton Grow- ing Association, liUl West Indian Cotton ... Department News Dominica Grammar School Agricultural Science at Expoit-i from Barbados, 1911 Fungus Notes :—• Exanthema and Sipia- mosis of Citrus Pack. 219 217 213 Page. ... 220 ... 218 Gleanings Insect Notes:— E
. Agricultural news. Agriculture -- West Indies; Plant diseases -- West Indies. A FORTNIGHTLY REVIEW OF THK IMPERIAL DEPARTMENT OF AGRICULTURE FOR THE WEST INDIES. NEW botat Vol. XI. No. 266. BARBADOS, JULY 6, 1912. Pbiob Id. CONTENTS. ^sericulture in St. Lucia, 1910 .. Bay f Embryo Cotton Notes :— Annual Report of the British Cotton Grow- ing Association, liUl West Indian Cotton ... Department News Dominica Grammar School Agricultural Science at Expoit-i from Barbados, 1911 Fungus Notes :—• Exanthema and Sipia- mosis of Citrus Pack. 219 217 213 Page. ... 220 ... 218 Gleanings Insect Notes:— Entomology in Fiji Mango, Enibryony of the 212 Manure. New 216 Market Reports 224 Nitrates in Cultivated 214 Soil, Foruiatioii of ... 217 214 Notes and Comments ... 216 219 Phoenix ... Rubber Exhibition, Third 213 217 International 221 Seeds, VitaKty 216 217 Soil Fertility, Theories Concerning 209 Students' Corner 221 222 West Indian Products ... 223 Iheories Concerning Soil Fertility. I. 'N recent years, great changes have taken place with respect to the way in which the is regarded in relation to the nutrition of plants, and investigators are by no means agreed in their views on the subject. The most general opinion is that the soil contains definite food bodies which are taken up by the plant, for its nutrition, and that owing partly to weathering and partly to the action of micro- organisms, among which bacteria are very important, some of these, as well as other substances, are produced or destroyed, according to the conditions that obtain. Other hyphotheses exist, however, among which the most divergent from what has been stated is that of Whitney, Cameron and , who have been engaged in work for the Bureau of Soils of the United States Depart- ment uf Agriculture. It is the present purpose to review this hypothesis, under the guidance of what is known broadly concerning the nutrition of plants and their relationship to t
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