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18.74. The farms are- c^ coarse, expe-rJmexLtal, end manyproblems will need to be solved. Is it, for instance,possible to establish an isolated acre of cocoa withoutthe provision of more lateral protection than can be suppliedin farms of this size ? First plantings of oocoawere far from successful. And if these farms suoceed willthey give an estimate of the likely success of the systemin the hands of formers denied the close supervision, particularlyin matters of animal health, which appears to begiven at Moor Plantation ? The experiments will be watchedwith the very greatest interest.75« Three of the farms were first cropped in 1944}the others were started only in 1945. There will neoessa«»rily be a long interval before the other permanent cropsare sufficiently established to bring in incomes comparablewith that of the coconut farmero More immediate data could''be expected if an established plantation of mixed edonomlctrees could be carved into units, as suggested by theRev. H.M. Grace in the Achimota Agricultural Extension Scheme'for Bunsu in 1936, Such a scheme would, however, give littleinformation regarding the establishment of orchord crops,particularly of fruit trees, which it is desired to further.76. I feel strongly that wherever possible an area ofsecondary bush should be included in the units. If fertilitycannot be maintained by the present system of manuringor rotations (including the possible turning-up of the establishedpastures) it would then be possible to start a newsystem, embodying the findings of the first experiments, andtaking advantage of the laborious establishment of the permanentcrops, which would otherwise need to be abandoned.The exhausted arable plots would prove valuable sites forcarrying out experiments in regeneration of fertility,GREEN MANURING.77. The four-course green-manure rotation first tried(1922) at Moor Plantation was as follov.'3:-I Yams (November); Mucuna (July).II Mucuna (Self-sown and supplied); RidgedJune; Cotton (July).IllIVGroundnuts (March); Mucuna (August).Ridged March; Early Maize (April);Mucuna (June J"; Ridged October forYams Tl).Ridging includes digging-in of Mucuna,78. The rotation was continued till 1933. There wasno very marked decline in yield except in the case of cotton.Compared with average yields over the whole plantation thefollowing reductions In yield were observed :- Groundnuts •Maize - 10$, Yams - 17$» Cotton - 63$= The failure of cottonis of interest. Hardy has recently suggested (TropicalAgriculture XXII.7, page 119 (1945)) that a low carbon/ g°nn l t p oratio may promote vegetative growth at the expense of boiling.v.It/