Proceedings of the South & East African combined agricultural, cotton, entomological and mycological conference held at Nairobi, August, 1926

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Monograph

Identifikator:: 1738588467

URN:: urn:nbn:de:zbw-retromon-115043

Document type:: Monograph

Title:: Proceedings of the South & East African combined agricultural, cotton, entomological and mycological conference held at Nairobi, August, 1926

Place of publication:: Nairobi

Publisher:: East African Standard

Year of publication:: 1926

Scope:: VI, 337 Seiten; Ill.

Digitisation:: 2020

Collection:: Economics Books

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Document type:: Monograph

Structure type:: Chapter

Title:: Part III. Cotton

Collection:: Economics Books

to ENCLOSURE TO PART III (c) Selection: (i.) plant to row; (ii.) mass. (d) Methods adopted for rapid increase of seed supply - from small samples. (e) Value of accurate observations as regards growth curves, flowering curves and bolling curves; value of correlating above curves with meteorological returns: presentation and analysis of results. (f) Value of crossing. (To be raised by Agricultural Department, Uganda.) 2. Methods adopted to secure the purity of seed distributed for sowing purposes. (Paper by H. C. Sampson, Empire Cotton Growing Corporation. T.C.(C)Cot.6.)* Interchange of varieties and pureness of strain of Cotton for trial and observation in various African Territories. (Paper by the Agricultural Department, Southern Rhodesia.) 3. Yield improvement by means of field experiments. (To be raised by the Agricultural Department, Uganda.) The notes on these items which had been prepared by Mr. H. C. Sampson of the Empire Cotton Growing Corporation and which had already been circulated (see Appendix) were considered and after certain subsidiary matters had been brought forward it was agreed to discuss the subjects of plant breeding and seed distribution under the following headings : — '" The keeping and correlation of records, including the clerical side of the work. Nomenclature of new strains. «. General technique at plant breeding stations. + Selfing methods. The position with regard to crossing. The exchange of strains between different territories. Methods of planting for economical multiplication of seed for small plots, by hand; and for larger areas, by methods other than by hand. Mass methods for maintaining quality of cotton seed. & Seed distribution. When these subjects had been disposed of it was agreed that the other items on the Agenda should be taken. 1. Tae KeepiNG AND CORRELATION oF FIeLp REecorps. Mr. DUCKER, who introduced the subject, considered that the correlation of records was extremely important, especially in territories such as Nyasaland where the variations of seasons were great. Tn a few years, reliable information could be obtained regarding the growth, flowering and fruiting of the plant, the incidence of insect attacks, etc. The influence of climatic conditions on these various matters might then become apparent. Up to date he had only been able to start records in a small way, but he wished to extend the system and obtain continuous and exact observations. One of the main handicaps was the shortage of native staff. He was now collecting records of plants at two stations, one at the height of about 2,100 feet, the other at the height of about 150 feet above sea level, * This paper is reproduced in the appendix. 144

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