Browsing by Author "Opoku, A."

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    Effect of water stress on the yield performance of seven dura x pisifera oil palm progenies
    (Journal of Ghana Science Association, 2008-06) Dwarko, D.A.; Nuertey, B.N.; Baidoo-Addo, K.; Asamoah, T.E.O; Marfo-Ahenkora, E.; Okyere-Boateng, G.; Opoku, A.
    Seven Dura x Pisifera (DxP) oil palm progenies were evaluated for yield in three climatic locations with different mean annual water deficit (150 mm, 250 mm a'nd 400 mm) values in order to deter­ mine their tolerance to water stress. The design used was a randomized complete block in 4 replica­ tions with a plot size of 0.48 ha (42 palms). Data was collected on number of bunches and bunch weight (kg) and fresh fruit bunch (FFB) yield (Tonnes/ha) was subsequently calculated. The data was analyzed-using Analysis of Variance (ANOVA) and means separated by Duncan's Multiple Range Test (DMRT). Significant progeny effects at each location on the yield parameters were ob­ served and, based on these results, three stress tolerant progenies were identified. The identification and selection of drought tolerant progenies for planting in marginal areas and the use of drought sensitive ones in optimum and favourable area in Ghana will lead to efficient utilization of available soil moisture and improvement in overall yields.
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    Improving the growth of oil palm seedlings with biostimulants neb-26 and neb29
    (Journal of Ghana Science Association, 2012-06) Danso, F.; Opoku, A.; Baidoo-Addo, K.; Danso, I; Afari, P.A.; Nuertey, B.N.
    Bio timulant appear an emerging option to improving seedling growth and development and a a production cost reduction strategy. They are known to stimulate the biological activitie of the oil microbe , increase root growth, enhance root nutrient uptake and reduce the need for addi­ tional fertilizer application. The study was to evaluate the effect of two bio timulant (NEB-26 and NEB-29) and their combinations with other fertilizer formulations on the growth of oil palm eedling at the nursery. The experiment, conducted at Okyinso near Kade from May 2005 to March 2006, wa a randomized complete block design with twelve treatment in three replica­ tion . Plant growth parameters such as plant height, butt circumference, frond dry weight leaf area and leaf area index were measured monthly. The results on the vegetative mea urement indicate that a mixture of NEB-26 with NPKMg fertilizer formulation and NEB-29 with PKMg fertilizer formulation promoted growth of the seedlings better than ole application of NEB-26 and EB-29 alone. .
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    Intensification strategy: determination of the income optimum time to under-plant oil palm with cocoa
    (, Journal of ghana science.association,, 2006-12) Nuertey, B.N.; Amoah, F.; Opoku, A.; Asamoah, T; Oppong, F.K.; Bonsu, K.; Marfo-Ahenkora, E.
    Cocoa was inter-cropped with oil palm of three different palm ages to determine the best time to under plant cocoa in oil palm. The experiment was conducted from 1994 to 2004 at the Oil Palm Research Institute, Kusi. Oil palm at three different ages;2, 4 ami 6 years after planting were un­ -der-planted wit" mixed cocoa hybrids. These were compared with sole oitpalmand sole cocoa. The treatments were arranged in a randomized complete block design. and. replicated three times. ". Growth and yield of oi! palm under-cropped with cocoa after 4 years comparedfavorably with sole oil palm. The income equivalent ratio defined as the land area under sole oil palm that TS required to produce the incomes achieved in lnter-cropping, were 1.08,1.25, 1.02, I, 0.31 for 2 years oil palm with cocoa, 4 years oil palm with cocoa, 6 years oil palm witli cocoa, sole oil palni a!Jll sole cocoa respectively. Results of this study suggest that maximum returns from the land is achieved when 4years old oil palm is under-planted with COCOa followed by 2 years and 6 years old oil palm respectively. Such lllte~cropping gave higher returns from the. land than either sole oil palm or cocoa plots.
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    Rapid multiplication of bamboo (bamb usa lietero- st;1ciiya): the effect of culm age and length of cuttings on sprouting
    (Journal of Ghana Science Association, 2009-06) Nuertey, B.N.; Opoku, A.; . Danso, I.
    The effect of age am/ length of bamboo clIlIIIS on sprouting of culm cuttings W{(S studied in {( field experiment at the Oil Palm Research Institute (OPRI), Kusi. The study was conducted as {( factorial combination of fOllr age groups «6 months, 6 months to 1 year, 1 year to 2 years and 2 years to 3 years) and three lengths (I node, 2 nodes and 3 nodes) ofculm cuttings. 11w 12 treat­ ment combinations were laid out in a randomized complete block design and replicated three times. The cuttings made from 1~2 years old culms bearing triple nodes produced significantly (P<0.05) more number of shoot (146) than all the other age group - length of CII/1I1 combina­ tions. The J-2'yeal's old cultns were found to be superior to the other age grollps am/ produced 69 shoots while 0, 29 and 20 shoots were produced by the less than 6 months old, 6 months to J year old and 2 to 3 years old culms, respectively. Whereas only 6 ami 24 shoots emerged from the cuttings with single ami double nodes, cuttings with triple nodes produced as many as 58 shoots. The study recommends the lise of cultns cuttings with' triple nodes made from /-2 years old culms for rapid multiplication of bamboo stock.