Journal articleshttps://hdl.handle.net/20.500.12852/8672024-03-28T12:31:16Z2024-03-28T12:31:16ZEnvironmental effects on the resistance of rice seedlings to complete submergencePalada, Manuel C.Vergara, Benito S.https://hdl.handle.net/20.500.12852/21762022-08-01T01:05:01Z1972-03-01T00:00:00ZEnvironmental effects on the resistance of rice seedlings to complete submergence
Palada, Manuel C.; Vergara, Benito S.
The survival of rice seedlings (<em>Oryza sativa L.</em>) after complete Submergence in water decreased with increased duration of submergence; with increased depth, temperature, and turbidity of water; and with increased rates of N fertilization. Survival increased with high light intensity and plant carbohydrate content. Factors that influence the survival of submerged plants also determine the amounts of N and carbohydrate in the plant.
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1972-03-01T00:00:00ZTechnical performance of developed appropriate technologies: Its utilization as an approach for sustainable Philippine agricultural mechanizationRomallosa, Aries Roda D.Laraño, L. E.Arostique, D. R. M.Hisu-an, Lyka M.https://hdl.handle.net/20.500.12852/21752022-07-29T04:00:18Z2022-07-01T00:00:00ZTechnical performance of developed appropriate technologies: Its utilization as an approach for sustainable Philippine agricultural mechanization
Romallosa, Aries Roda D.; Laraño, L. E.; Arostique, D. R. M.; Hisu-an, Lyka M.
The study related to the technical performance of the different appropriate technologies developed in Iloilo City, Philippines to introduce the agriculture sector machinery and equipment access and solutions towards sustainable agricultural mechanization operations. The utilization of agricultural equipment is cited as an important tool to promote agricultural modernization through the use of technologies, preserving the environmental and cultural components and incorporating socio-economic considerations in order to attain the sustainable development of both the food and the agriculture sectors. The six selected technological development are subdivided into three mechanization categories, namely: Crop Management Technologies, Size Reduction Technologies, and By-Product Utilization Technologies. They were all subjected to actual operating performance evaluation at a minimum of three test runs and the results were compared in terms of the minimum requirements set by the Philippine National Standards or Philippine Agricultural Engineering Standards (PNS/PAES). Results revealed that the important operating parameters such as operating efficiency of the technologies developed starting from postharvest (77% - 80%), to size reduction (92% -99.67%) and by-product utilization (8.4% - 13.1%) were computed to be within the Philippine National Standards or Philippine Agricultural Engineering Standards. These outcomes indicated the promising technical potentials when they are introduced in communities to the users.
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2022-07-01T00:00:00ZJob change and self-control of waste pickers: Evidence from a field experiment in the PhilippinesYokoo, Hide-FumiIkuse, MakiRomallosa, Aries Roda D.Horita, Masahidehttps://hdl.handle.net/20.500.12852/17052021-11-23T01:00:18Z2018-06-15T00:00:00ZJob change and self-control of waste pickers: Evidence from a field experiment in the Philippines
Yokoo, Hide-Fumi; Ikuse, Maki; Romallosa, Aries Roda D.; Horita, Masahide
Environmental policies may have a negative side effect on employment, often in a specific industry in the short run. Workers in regulated industries can be affected by losses in job-specific human capital. The informal sectors in developing countries are often associated with environmental pollution and thus targeted by such policies. Welfare loss due to this side effect can be problematic in developing countries, since they often lack safeguarding schemes, including unemployment insurance. Inducing workers in informal sectors to change their jobs can mitigate these negative side effects. This study examines efficient methods of inducing informal workers to change jobs. An alternative job is offered to informal workers at a dumpsite in the Philippines and whether changing the scheme of wage payment increases the acceptance of the offer is examined. The impacts of changing payment schemes are evaluated by using a randomized field experiment. The sampled 112 waste pickers each randomly receive one of four offers for an alternative job, and the number of those who accept the offer is observed to evaluate the impact of less frequent payment (i.e., once every three days instead of daily). Piece rates and fixed wages are also compared. Those offered less frequent payment are more likely to accept the job offer compared with those offered daily payment. This preferred payment scheme can mitigate the side effects of environmental policy and workers’ self-control problem related to savings, while minimizing moral hazard.
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2018-06-15T00:00:00ZFeasibility of biomass briquette production from municipal waste streams by integrating the informal sector in the PhilippinesRomallosa, Aries Roda D.Kraft, Eckhardhttps://hdl.handle.net/20.500.12852/16992021-11-22T01:00:14Z2017-02-24T00:00:00ZFeasibility of biomass briquette production from municipal waste streams by integrating the informal sector in the Philippines
Romallosa, Aries Roda D.; Kraft, Eckhard
A technical and socio-economic feasibility study of biomass briquette production was performed in Iloilo City, Philippines, by integrating a registered group of the informal sector. The study has shown that the simulated production of biomass briquettes obtained from the municipal waste stream could lead to a feasible on-site fuel production line after determining its usability, quality and applicability to the would-be users. The technology utilized for briquetting is not complicated when operated due to its simple, yet sturdy design with suggestive results in terms of production rate, bulk density and heating value of the briquettes produced. Quality briquettes were created from mixtures of waste paper, sawdust and carbonized rice husk, making these material flows a renewable source of cost-effective fuels. An informal sector that would venture into briquette production can be considered profitable for small business enterprising, as demonstrated in the study. The informal sector from other parts of the world, having similar conditionality with that of the Uswag Calajunan Livelihood Association, Inc. (UCLA), could play a significant role in the recovery of these reusable waste materials from the waste stream and can add value to them as alternative fuels and raw materials (AFR) for household energy supply using appropriate technologies.
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2017-02-24T00:00:00Z