Volume 9, Issue 2

Soil Fertility Management Practices by Smallholder Farmers in the Bamboutos Mountain Ecosystem
Original Research
Low soil fertility is one of the major constraints faced by smallholder farmers in the Bamboutos Mountain ecosystem. A survey of 261 randomly selected smallholder farmers was conducted using a standard questionnaire to identify the major cropping systems used by smallholder farmers, the practices that smallholder farmers use to maintain or improve soil fertility, the types of manure or fertilizer used as well as the major crops grown in the area. An interview schedule was used to collect data and the descriptive statistics used for data analysis. Findings indicated the farmers practiced, inter cropping, crop rotation and agroforestry with intercropping being the most practiced cropping system. The farmers use both organic manures and inorganic fertilizers for crop production with the major organic manure being fowl dropping and the major inorganic fertilizer being N-P-K 20-10-10. To increase soil fertility, 73% of the farmers allow for fallow periods and the dominant vegetation during the fallow were: grasses, grasses +Tithonia and Grasses + shrubs. The major crops planted both organically and with inorganic fertilizers were Potato, cabbage, carrot, maize, beans, leeks and celery.
World Journal of Agricultural Research. 2021, 9(2), 58-64. DOI: 10.12691/wjar-9-2-3
Pub. Date: April 26, 2021
Sustainable Bamboo Farming to Mitigate Soil Degradation in Kinale Area, Kiambu County
Original Research
Increasing global attention towards the potentially devastating effects of climate change provides the need to focus on adoption of sustainable Bamboo farming to mitigate the effects of soil degradation. The objective of this study was to determine how sustainable Bamboo farming was adopted to mitigate the effects of soil degradation in Kinale area of Kiambu County. Data collection was done both quantitatively and qualitatively by use of questionnaires, focus group discussion and observations. Random sampling was used to select the interviewee of the study. Data was collected using questionnaire and focus group discussions, analyzed using SPSS versions 2.0 and results presented in percentages, frequency tables, charts. Pearson correlation with a significance of 0.05 was used to show relationship between the dependent and independent variables. The results of the study indicated that sustainable Bamboo farming was effective in curbing soil degradation with 93% of farmers stating it was reliable in averting the effects in their lands. The study recommended need for proper training to the farmers who are practicing on how to propagate Bamboo.
World Journal of Agricultural Research. 2021, 9(2), 53-57. DOI: 10.12691/wjar-9-2-2
Pub. Date: April 25, 2021
Efficacy of Trichoderma asperellum Seed Treatment and Ridomil® Application in Managing Late Blight on Potato
Original Research
Potato seed tubers latently infected with Phytophthora infestans initiate late blight that requires early fungicide application raising economic and human concerns. The objective of the study was to determine the efficacy of Trichoderma asperellum seed treatment and Ridomil® (Metalaxyl 4% and Mancozeb 64%) application to manage late blight. Ridomil® was applied at 21-, 14- and 7-day intervals on seed tuber and apical cuttings pre-treated with T. asperellum at 33 % (3 × 106), 66% (7 × 106) and 100% (1 × 107 CFU/mL) concentration by either dipping or injection. Results revealed that 7- and 14-day spray intervals were not significantly different (P=0.05) in terms of yield and late blight severity. Rooted apical cuttings had 7.4% higher disease severity resulting in 2.3% lower yield than crop from seed tubers. T. asperellum at 66% and 100% concentrations reduced disease severity by 26% and 27% respectively. Pericardial injection had 8.3% higher yield and conversely 7.8% higher disease severity than dipping. The combination of T. asperellum at 66% concentration with a 14-day spray interval provided better late blight management. The results suggest that seed treatment by dipping using 66% T. asperellum suspension could increase fungicide application interval by 7 days while improving on yield.
World Journal of Agricultural Research. 2021, 9(2), 42-52. DOI: 10.12691/wjar-9-2-1
Pub. Date: February 23, 2021