Nematicidal Effects Of Different Biochar Sources On Root-Knot Nematode (Meloidogyne Spp.) Egg Hatchability and Control on Mungbean (Vigna Radiata (L.) Wilczek) (Published)
The nematicidal effects of different biochar sources and a synthetic nematicide on Root-Knot Nematode (Meloidogyne spp.) egg hatchability and control on mungbean were compared in Petri dishes and pot experiments. Each Petri dish contained 100 eggsml-1 of nematode eggs suspension and were arranged in CRD with six treatments and a control replicated thrice. Treatments included: biochars of bitter leaves, cassava peels, sawdust and poultry waste, a synthetic nematicide (Carbofuran 3G) and tap water (control). Suspension of the biochars and nematicide were applied at 0.1 g/ml and 0.015 g/ml respectively. Eggs hatched were observed for 24, 48 and 72 hours. In the pot experiment, each pot (except the control) was inoculated with 2,000 nematode eggs and was arranged in CRD. Similar treatments as in egg hatchability were used. The biochars and nematicide were applied as powder at 20 g/pot and 3 g/pot respectively. Data collected included: growth parameters, pod and grain yield, shoot and root parameters, nematode galls and population. They were subjected to ANOVA and means were compared using LSD at 5% probability level (P<0.05), using computer software “Genstat Discovery Edition 4”. Results showed that bitter leaves biochar compared favourably with Carbofuran on nematode egg hatchability. Generally, biochars of cassava peels and sawdust compared favourably with nematicide on the control of RKN on mungbean but did not significantly affect yield and nodulation.
Improving Quality of Kenaf Fibers (Hibiscus Cannabinus L.) on the Posted Coal Mining Point Using Biochar and Planting Mucuna (Published)
Mining techniques undertaken in Borneo generally use open pit mining with back fillings method, causing critical land resulting from the loss of ground cover vegetation, the heavy pressure of the gravitational force on the rainwater that hit direct soil surface, erosion, direct exposure to sunlight and soil compaction caused by heavy equipment use. The objective of this research is to obtain ex-coal mining area that can be used for agricultural land and plantation land by reclamation of coal mine former land with biochar and planting of mucuna LCC species, so that the soil contains good nutrient and soil texture so that the growth process the kenaf plant can grow well. The research was carried out for one years, in the area of coal mining ex-field at PT. Puspa Juwita, Muara Badak, Kutai Kartanegara as a place of planting of kenaf plant by using biochardan mucuna planting is expected to be an alternative which become option because easy, cheap and effective. The design used in this research is Completely Randomized Design in Factorial form where the first factor is biochar and the second factor is mucuna planting. The results showed that the kenaf plant can grow well on post-mining land of coal that has been given biochar and mukuna planting first. From the highest stem diameter and height of the kenaf plant the highest was seen in the B5 treatment (Biochar 100kg) and the lowest in treatment B1 (without treatment)
Agricultural Extension Services Using a Participatory Approach in Vegetable Growing Areas in Suriname (Published)
Extension Officers from the Agricultural Extension Service in Suriname, charged with communication, face difficulties in transferring information to farmers. Therefore, a mixed method study was carried out to explore possibilities to improve communication strategies and to facilitate the introduction of novelties and good practices. From August 1, 2016-February 15, 2017 388 small-scale vegetable farmers participated in a survey gauging their knowledge and practices. In addition, a participatory farmers’ experiment was conducted with 15 farmers to convey information about the application of Biochar, an innovative soil-improving compound. Results revealed that extension officers lack relevant specific agricultural knowledge. Important information on sustainable agriculture did not reach most farmers, although the participatory approach provided the means for information exchange and allowed conveying the needed information. The experiment showed that practical sessions on a regular basis with bi-directional information interchange with farmers as conducted in this research can be an effective method to introduce novelties and good practices.