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•13.,is possible feat the continued digging-in of greenmanuremay have produced an excess of available nitrogenin these pLjits.7 9 . The system was not.taken up by the local farmer.Since mucuna is not edible (mucuna meal has givenpoor results as a cattle feed) the rotation produces onlyfour payable crops per annum. It might appear to haveno advantage over a four—year period of intensive croppingfollowed by a four-year bush fallow: data to contestthis point were not available. Its chief drawback wasthe amount of labour entailed in three ridgings in fouryears. Minor objections were that groundnuts were rarelygrown by the local farmer, and that cotton was nevergrown as a sole crop.8 0 . In a revised rotation, worked between 1934 and1 9 3 7 , Mucuna was largely replaced by Popondo (Phaseo 1 uslunatus = Apatram) and cropping was intensified to giveseven payable crops per annum. I ,. ;; '•'• *fl am «EH 'I Yams (February)*; Popondo (June); Burnt• . • and moulded February.II Early Maize (April) with Cotton (July); 1 ''Burnt February. f» • - 0 JIII Early Maize (April); Mucuna (July); ridgedAugust; Late Maize interplanted with------ Popondo (September); moulded February*7 7 IV Early Maize (April) with Popondo (June);Burnt and ridged January.81o • Under this rotation there was a rapid fall inyield. Yields of early maize which had been between1 , 0 0 0 and 1,900 lbs. per acre in the Old rotation ( paragraph7 7 ) "dropped from 971+ lbs. in 1 9 3 4 to 805 lbs. in1937....1 ihe cash value of the total crops was no greater,whilst labour costs for the new rotation were £ 2 perannumhigher than for the old (U acres at 1 / - per day).Popondo provided a poor cover, it proved not so popular7'an article of diet as was expected, and yields were eo"i^pw (So lbs. shelled beans per acre) as to be barely worthpicking. Compared with local practice the rotationoffered a poor, selection of crops.8 2 , Four new rotations were begun in 1 9 3 8 . Popondowas entirely ousted in favour of Mucuna, which was used, asan interplant rather than as a sole crop. Cassava .wasintroduced for the fir6t time whilst melons, okras, cowpeasand tobacco were included re interplante in one or other ofthe rotations. Two examples are given.B./Late planting of yams adopted to enable thedetection of efel-worm damage during stftreg«»
B. I Yams (Febr ua-rjr) linearis (July)II Groundnuts (March) f.b- Late Maizei.w- Mucuna ( September) IIII Early Maize (April) i.w- Cassaya (July)i»v/« Cowpea s (SeptemborjlIV Cassava (contd.) fsb. Mucuna (July) f.b.lobacco (September).C. I Yams (February^ i.w. Early Maize (^pril);Mucuna (July) -II Ee rly Ma ize (April) i.w. Melon f„b. Late- Ma ize i.wl? Mucuna (.September) -III Yams (February) i.w. Okra (March); Mucuna(July) .n • •.TV:,. Grc undnuts (March)' .'f.b. L'ate Ma ize ii**." '•1Mucuna TCeptember).8 3 o This rotation was being closed down at the timeof my visit,. Mucuna c s an interplant has""not been successfuland has smothered both yams and 'early maize.'' Due provisionfo-r the type of mixed cropping represented In thisrotation has been made in the Unit Farms (paragraph 6 2 ) .A new series of four green-manure rotations, relying oncowpeas as an interplant and once- more using mucuna as asole orop, to be dug-in, was under preparation. Thesuggested scheme was ;-p —— 1R.Early Maize]QI :i Y A '•• II . H I 'Mucuna R.Yams Cassava (contd.)Cotton R.Late Maize Cassava Muc unaCowpet' BR. YarnsCowpeas- 1 • i jR.EaTly Maize. R.:Early Maito Cassava (contd.)Cotton Mucuna Cassava MucunaCowpeasCowpeasR R. Ea rly Ma ize R.Early-Maize Cassava (contd.)Cotton '\ " Mucuna Ca ess va Mucuna* i 'in/) iCowpbfcs ''* ' - 'IS jtf Cowpeas ..»•» - 1 1 v.S R.Early Maize R. Groundnuts R.Yams , Cassava (contd.,)• • V.-"t '"•CotWh . •i MiTobaooo Ca-esfvye • ii'ucuna " ] "'Cowpeas:,..,' . • j •. $ CowpeasRidged.. • ..ft ..The /
Page 2 and 3: UNIVERSITY OF GHANALIBRARYmiPBOCEOJ
Page 5 and 6: G 0 N I E H T S.ParagraphIntroducti
Page 7 and 8: Nigeria £526,00, Gold (JoaW . l t
Page 9 and 10: 1."The experience of the last yearo
Page 11 and 12: 2T. i-t appears by nc meanp e-artti
Page 13 and 14: Soil Gov.re (FQ 5H). 19UU-5 Treatme
Page 15 and 16: trials with sterilized and non-ster
Page 17 and 18: t12.that their clearance could be e
Page 19 and 20: J14.could be expected if farmers wo
Page 21 and 22: t16.UNIT FARMS ( SOJTH.) .620 A ser
Page 23: 18.74. The farms are- c^ coarse, ex
Page 27 and 28: 22,tS ; Farmy; rd Irnure y Artifici
Page 29 and 30: 2k.95. Rock phosphate is obtainable
Page 31 and 32: 26.30IL R^GEN^RAT10 H.A Jargfi nnrr
Page 33 and 34: In before sweet poterto; manured at
Page 35 and 36: 3012.5* The Aim has been to.Jvreed
Page 37 and 38: 3 2 .Th~ rations used at Minna arc
Page 39 and 40: 34.139- Reference hee--been mode to
Page 41 and 42: 11+7* The farm consists of 250 acre
Page 43 and 44: een largely ousted by G..E. B, 24,
Page 45 and 46: 40.163. The growers' price quoted-
Page 47 and 48: 42,170. I gave Mr* Smith a short hi
Page 49 and 50: 44°No case of sadden death ^as bee
Page 51 and 52: 46.depreciation on the co».t (£36
Page 53 and 54: 48,201. Of 34 varieties tested at S
Page 55 and 56: 50.211. Experiments made in Ibadan
Page 57 and 58: 52.GRuINSTORAGE.220. The normal pri
Page 59 and 60: 54.there is little to be said for t
Page 61 and 62: APPENDIX I.I T I N E R A R Y.Novemb

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