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7-A. Intercropping ; Benin Syfitern, G-r-•j?p.e&...2...yea-rs ;fajjj n» 7 - 9 yea re,B. Exhaustive Cropping- To be fallowed only-whenexhaust-ed.C. Weed cover. Cutlassed to knee height for directcomparison with leguminous coyer (E).D. Weed and bush cover. Establishment amongst regeneratedbushl Cutlassed ;nly once annually,at end rf rains, m addition to mulch effect• this appears to bo a good practice, as clearingtakes place at the time of maximum- sunlight,which oil-pa 1ms appear to relish.E. Standard practice. Leguminous cover. Pliers.riajavanica (slow growing) established throughfaster growing Calapcgonium.• Treatments A. 1940 yams- 1941 yams, 1942 fallow.B- 1940, 41, U2 Yamd 19U3 Early maize,cassava. 1944-45 cassava - replacedcoccyam October 1945-Nitrate Content. Highest under leguminous cover (E).Moisture Content. During dry season highest in D(significance doubtful ?).Costs. Lowest for D,: A and B not directly comparable: have proved most expensive despitesale of crops-Growth Rate. • Determined by count cf number of leavescn twe selections planted through area.Results are as yet tentative- Growth rateis sc far greatest cn cultivated plots A and B,and apparently greater under bush cover D thanunder leguminous cover E.26. Burning V. Non-burning, (FQ 2). 1940. - •' 2. Treatments j 7 Replicates?, Randomized :Plot Size i'acre s Determination of nitrate content,made by the Agricultural Chemist during 19^4 and 1945showed that nitrification was. despite very large plot-to—Plot variation, consistently (and probably significantly)higher on the hon-burnt plots-(Maximum values (March 1945) Non-burnt 22, r>urnt '16Minimum values (Oct.. 1944) Non-burnt Burnt 3parts per million nitric nitrogen.)27. Soil Covers (FQ. V, , iqa.3-9 Treatments ; 9 replicates : Plots 1/20th acre.Nine covers (i) Calapogcnium tli) Tephrbsia Candida (ill)Centrosema pubescens (iv) Centroaena plumieri (v) Puerariaavanica (vi) Weeds knee height (vti) Weeds untreatedviii) Elephant grass (ix) Acioa Barteri.Soil Covers /
Soil Gov.re (FQ 5H). 19UU-5 Treatments ; 9 replicates,(i) Wild canna (bidentata) (ii) Paeraria (3ij) AoioaBarteri ( iv) Clean weeding (v) Cassia alata.28. - Seed Testing. (FP). 191+1.Selected seed is planted cut for comparisonwith mixed seed from wild trees. Three methods of plantingare being tried (a) 3' x 3' x 3' planting hcles (b)ditto with heavy mulch in dry season (c) planting hcle3' square, 5' deep. Lower 2 ! feet of earth not replacedin hole, so that planting level is 2' below surface.This practice has been found (Sampson) successful withcoconuts in Ceylon in preventing subsequent baring of roots.29. Spacing Trials. Various Blocks. 120 acres. 191+2.6 Spacings : 12 replicates, Densities vary fram 22 to. - 111+ per acre.Triangular ( i) 21' ( ii) 25' (iii) 30' ( iv) 1+2'Square (v) 12' x 65' (vi) 21 f x 65' (vii) 30" x 65'(viii) 21 ' x 1+0 1 .Three covers (a) Elephant grass (b) Bush (c) Pueraria, areestablished. An estimate of the number of cattle thatcan be grazed on the covers is being made. Ultimatelythe area will be grazed and intercropped, using ploughs,between rows.Covers were planted in 191+2 t palms were planted in191+3, but wholesale replanting has been needed during 191+5.The reasons for such heavy failure are not fully known.Losses from bush-rats have been high, and every plant mustbe protected by a wire screen. Attempts to screen offplots or portions of plots by stake hedge6 were not successful.30. Pcllina tion. The method of Hill and Mason (1925)modified by Smith (1929) has been further improved. Twcdays before they are judged about to- open male and 1 femaleflnwers are bagged after sterilisation with 1+ per cent formalin.Stout canvas bags with a celluloid observationwindow (or during war-time with a retractable corner) areused. ' The stem is trimmed and the Dag tied with its mouthfitting around a cotton-wool collar. Male flowers, whenfully open, are cut off below the bag and- carried to thelaboratory, where the pollen is sifted and stored in smalltubes (selection) or Petri dishes (mass pollination) kept in0 desiccator. Female flowers are pollinated cne day beforethey appear receptive, and on the two succeeding days.Pollen is blown by an insufflator through a hole in thecelluloid window, which is then resealed by a plaster patch.Bags are left in position until all the stigmas are -withered(one to three weeks).!51. /
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: 2T. i-t appears by nc meanp e-artti
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 and 24: 18.74. The farms are- c^ coarse, ex
Page 25 and 26: B. I Yams (Febr ua-rjr) linearis (J
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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