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Record number 525772
Title Fertilizer requirements of cacao (Theobroma cacao L.) in South-Western Nigeria
Author(s) Wessel, M.
Source University. Promotor(en): A.C. Schuffelen. - Amsterdam : Koninklijk Instituut Voor de Tropen - 104
Publication type Dissertation, internally prepared
Publication year 1971
Keyword(s) plantenvoeding - kunstmeststoffen - mest - theobroma cacao - cacao - bodemkunde - plantkunde - nigeria - plant nutrition - fertilizers - manures - cocoa - soil science - botany
Categories Stimulant Crops
Abstract

The studies reported on were conducted in the period 1961-1970 when the author was employed by the Cocoa Research Institute of Nigeria at Ibadan, formerly a sub-station of the West African Cocoa Research Institute.

In the first three chapters information is given on the cacao industry and on the climate and soils in general and cacao soils in particular of the main cacao growing area of South-Western Nigeria. In the next chapter (4) a study on soil moisture is presented. In view of the long dry season the soil moisture relationships are the main factor determining the suitability of the soil for cacao. This chapter is followed by one on soil phosphorus which was found to be the main nutritional factor limiting yield as shown by the results of the fertilizer trials reported in chapter 6.

The results of an investigation on whether soil and leaf analysis can be used to assess the nutrient requirements of cacao are given in chapter 7. In the last chapter the results of the preceding chapters are summarized and discussed.

Analytical methods and sampling procedures are given in appendix I while some analyses of variance are given in appendix II. Most of the statistical analyses were carried out by the Statistics Department of Rothamsted Experimental Station, England.

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