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Effects of Management Practices on Agronomic Parameters in Cocoa Agroecosystems at Peripheral Zone of Ebo Forest Reserve, Littoral Region, Cameroon

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Agricultural Sciences 2022年第10期13卷 1151-1175页

作者： Ofundem Tataw Ojong Enow Andrew Egbe Joseph-Marie Ondoua Tina Fongod raymond ndip nkongho Department of Plant Sciences University of Buea Buea Cameroon Department of Agronomic and Applied Molecular Sciences University of Buea Buea Cameroon Department of Food Science and Technology University of Buea Buea Cameroon

The study was carried out to assess the effect of management practices on agronomic parameters of cocoa agroecosystems in the peripheral zone of Ebo Forest Reserve. Purposive random sampling was conducted to establish experimental plots on the farms of willing farmers. Demonstration plots were established and agronomic parameters were monitored for “farmers’ practice (FP) and integrated crop pest and disease management (ICPM) practice” using indicators of Cocoa agro-ecosystem analysis (AESA). The FP and ICPM treatments were replicated in ten sites. From AESA records of agronomic parameters, the “observe, learn, decide and act” (OLDA) model was implemented in the ICPM treatments only. The effects of management practices were analyzed using a two-way analysis of variance (ANOVA), and treatment means compared using Turkey’s T-test at 5% probability. Results of ANOVA between the two Management practices showed that over 50% of the response variables were statistically significant. Means separated through GLM ANOVA with Tukey pairwise comparisons at α = 0.05 showed that 14 (53.8%) out of 26 response variables monitored were statistically significant between the two management practices. Pruning, shade management, phytosanitary harvest, rational use of pesticides, farm sanitation, pod harvesting, breaking, fermentation of beans and drying were regular in the ICPM treatment and time-bound in the FP treatment. The average total production varied from 385.83 kg/ha in FP treatment to 572.8 kg/ha in the ICPM treatment, still below the average standard of 1000 kg/ha. The OLDA model applied in ICPM treatment following AESA is a relevant tool to enhance sustainability in the management of cocoa agroecosystems. Farmers should be sensitized and trained on appropriate farm management techniques and enhance access to extension services as well as make available improved and grafted planting materials to ensure appropriate productivity levels.

关键词： Agroecosystem Agronomic Parameters Cocoa Management Practices

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Effects of Management Practices on Agronomic Parameters in Cocoa Agroecosystems at Peripheral Zone of Ebo Forest Reserve, Littoral Region, Cameroon

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Agricultural Sciences（农业科学） 2022年第10期

作者： ofundem tataw ojong enow andrew egbe joseph-marie ondoua tina fongod raymond ndip nkongho department of plant sciences university of buea cameroon

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Agronomic Practices and Macronutrients Status of Different Age Groups of Smallholder Oil Palm (Elaeis guineensis Jacq.) Plantations in Dibombari Sub-Division, Cameroon

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Agricultural Sciences 2023年第10期14卷 1444-1464页

作者： James M. Kundu Godswill A. Asongwe Lawrence M. Ndam David T. Agbor Aaron S. Tening raymond N. nkongho Department of Agronomic and Applied Molecular Sciences Faculty of Agriculture and Veterinary Medicine University of Buea Buea South West Region Cameroon Department of Environmental Science Faculty of Science University of Buea Buea South West Region Cameroon Department of Soil Science and Plant Nutrition Faculty of Agriculture Ondokuz Mayis University Samsun Turkey Department of Food Science and Technology Faculty of Agriculture and Veterinary Medicine University of Buea Buea South West Region Cameroon

Oil palm is cultivated by agro-industries and smallholders for vegetable oil production. Good farm management practices with balanced soil and plant macronutrients are needed to attain optimum yields. Smallholder oil palm farmers of Dibombari Sub-Division, Cameroon, suffer from low on farm yields which could emanate from the agronomic practices implemented, which also has an influence on the soil and plant macronutrient status. This study provides information on the agronomic practices, soil and plant macronutrients status in smallholder oil palm fields. Structured questionnaires were administered to 200 farmers to collect data on their agronomic practices, using a stratified random sampling design. Soil and plants were sampled from plantations of different age groups (control, >0 - 4 years, >4 - 8 years and >8 - 15 years’ plantations) in four locations of the Sub-Division (i.e. Dibombari-central, Bonamateke, Bomono and Nkapa) using a randomized complete block design. Data collected, was analyzed using descriptive and inferential statistics. The results showed that 65% of farmers planted Tenera variety, with majority of them below the standards for weeding (81%), fertilizer use (100%), pruning (62%), pest/disease control (90.5%) and harvesting (96%) practices. Soil macronutrients were low across the different plantations except P which was optimal at >0 - 4 years and >4 - 8 years’ plantations but low at >8 - 15 years’ plantation. Similarly, for plant macronutrients, N and P were optimal across the different plantations, while K and Mg were optimal at >0 - 4 years’ plantation but low at >4 - 8 years and >8 - 15 years’ plantations. Thus, agronomic practices and macronutrient status of soil and plants were below standards in smallholder oil palm plantations of Dibombari, leading to low yields of fresh fruit bunches.

关键词： Smallholders Oil Palm Plantations Agronomic Practices Soil and Plant Macronutrients

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Agronomic Practices and Macronutrients Status of Different Age Groups of Smallholder Oil Palm (Elaeis guineensis Jacq.) Plantations in Dibombari Sub-Division, Cameroon

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Agricultural Sciences（农业科学） 2023年第10期

作者： James M. Kundu Godswill A. Asongwe Lawrence M. Ndam David T. Agbor Aaron S. Tening raymond N. nkongho

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