Fathin Ayuni Azizan
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Preferred name
Fathin Ayuni Azizan
Official Name
Fathin Ayuni, Azizan
Alternative Name
Azizan, Fathin Ayuni
Azizan, F. A.
Ayuni Azizan, Fathin
Main Affiliation
Scopus Author ID
56925398900
Researcher ID
GSD-9716-2022

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  • Publication
    Rubber leaf fall phenomenon linked to increased temperature
    (Elsevier B.V., 2023)
    Fathin Ayuni Azizan
    ;
    Ike Sari Astuti
    ;
    Anthony Joseph Young
    ;
    Ammar Abdul Aziz
    Understanding phenological responses of vegetation to temperature have become increasingly important as the global climate changes. We examined how changes in temperature may be associated with the occurrence of rubber leaf fall, a new phenomenon affecting many rubber (Hevea brasiliensis) plantations. Spatial and temporal characteristics of the start and end of the rubber season for six study areas from four major rubber-producing countries were investigated using satellite imagery and 10 years of surface temperature data from 2010 to 2019. These study areas were Palembang (1154 ha) in South Sumatra, Indonesia; Medan (2667 ha) in North Sumatra, Indonesia; Ratnapura (581 ha) in Sri Lanka; Johor (195 ha) in Malaysia; Kedah (803 ha) in Malaysia; and Tboung Khmum (2421 ha) in Cambodia. Our results showed that there was a significant upward trend in average mean temperature for Palembang, Medan, Ratnapura and Johor, and that these trends were associated with a statistically significant difference in rubber defoliation and refoliation events. This shift also coincides with the reported occurrence of Rubber Leaf Fall disease from these study areas. In contrast, no change in temperature trends or phenological shift was identified for the two other study areas, and the disease was not reported in these areas. Overall, warming resulted in delayed phenological timing in most locations. While additional research is required to exclude alternative explanations, there is a strong possibility that climate change is responsible for the emergence of the new Rubber Leaf Fall disease.
  • Publication
    Adoption of improved rice varieties in the global south: a review
    (Elsevier, 2023)
    Julia Checco
    ;
    Fathin Ayuni Azizan
    ;
    Jaquie Mitchell
    ;
    Ammar Abdul Aziz Abdullah Kallaroth
    Improved rice varieties (IRVs) play a significant role in establishing food security and improving livelihood in the Global South since its introduction in the 1960s. However, the adoption of new IRVs has remained relatively low. This low adoption poses a challenge to rice-producing and consuming countries as they are increasingly threatened by production shortages, malnutrition, and poor rice quality. Many empirical studies have attempted to identify the determinants influencing the adoption of IRVs by distinguishing the characteristics between adopters and non-adopters. This review showed a consensus on the important determinants influencing the adoption of IRVs in the Global South. Findings synthesized from 99 studies suggested that variables (farm size, education, information access and farm location) examined extensively are not necessarily the most important determinants of adoption when undertaking a weighted analysis. Terrain, source of seed and technology-related attributes (perceived yield, maturity, ease of use, marketability and technical efficiency) are more important determinants of adoption, with determinants changing according to adoption type (probability or intensity of adoption), variety type and region. The recommendations for future adoption studies include: incorporating more technology-specific variables, increasing research for overlooked regions and variety types, shifting away from predominant static analysis by capturing the dynamics of the adoption process, and considering the potential biases in analyses. This review will facilitate the development of targeted interventions and policies that promote IRV adoption in the Global South.
  • Publication
    Carbonization effect on EFB briquettes prepared with different type of binders
    (IOP Publishing, 2020)
    Munira Mohamed Nazari
    ;
    M Y Idroas
    ;
    Fathin Ayuni Azizan
    Biomass energy is gaining public interest as a result of the environmental impacts and depletion of fossil fuel resources. Thus, biomass briquettes have emerged as an attractive option due to its huge renewable energy potential. The biomass briquettes are used for thermal applications because it can produce complete combustion as it has consistent quality and high burning efficiency. However, the quality of the briquettes can be added by application of carbonization treatment method. Carbonization of biomass is a waste treatment process in which a biomass is heated in an oxygen-free or oxygen-limited environment. In this study, carbonized EFB was blended with binders and densified into briquettes. The mixing ratio of binders to carbonize EFB were fixed at 20%. The effect of the carbonization treatment on the briquette properties and combustion characteristics was studied through proximate and ultimate analysis while high heating value (HHV) was analyses by using bomb calorimeter. To explore the potential of carbonized EFB briquettes, the results were compared to untreated EFB briquettes. Results indicate briquette TS2 as the optimum formulation since it owned moderate physicochemical properties. In addition, the briquette had highest HHV of 23.62 MJ/kg which is approximately 30% higher than briquette prepared from untreated EFB. Overall, carbonized EFB blended with tapioca starch was found to improve the briquette quality and enhance the possibility to use as syngas production.
      13  1
  • Publication
    Measurement of leaf chlorophyll content in Harumanis mango cultivated in a greenhouse using SPAD meter
    ( 2023-01-01)
    Ahmad N.A.
    ;
    Muhammad Firdaus Abdul Muttalib
    ;
    Muhammad Nur Aiman Uda
    ;
    Zainal Abidin Arsat
    ;
    Fadhilnor Abdullah
    ;
    Mohd Khairul Rabani Hashim
    ;
    Fathin Ayuni Azizan
    ;
    Jusoh M.F.
    ;
    Kamaruzaman S.R.S.
    ;
    Nordin A.A.
    The Soil and Vegetation Analysis Development (SPAD) value was correlated to the actual value of chlorophyll content in the Harumanis mango leaf using a developed regression model. Distribution of chlorophyll content in Harumanis mango leaves were mapped using Geospatial Analyst in the ArcGIS. Total chlorophyll content and SPAD value were well established with the polynomial regression model with coefficient of determination (R2) of 0.925. The results show that the measured SPAD value in the morning were comparable to those value made in the evening and the Harumanis leaves located in the middle of the greenhouse have 25–31.3% lower chlorophyll content compared to other parts of the greenhouse.
      53  6
  • Publication
    Assessing changes in soil moisture distribution for before and after irrigation in a Harumanis Greenhouse
    ( 2024-03)
    Arravinthen Nagarajah
    ;
    Fathin Ayuni Azizan
    ;
    Fatnin Nazifa Mohamad Zalani
    Soil moisture is an essential factor in determining the quality of crop production in farming areas, particularly in a greenhouse. It is important to ensure that the irrigation in the greenhouse can provide ample water needed by trees. This study aims to assess the status of soil moisture and map its distribution in a greenhouse following the irrigation supply. Soil samples were collected at forty randomly chosen locations at two different intervals of before and after irrigation supply. The soil moisture content is determined by the gravimetric method in the laboratory. Two soil moisture distribution maps were developed using soil moisture data and the coordinates of the sample locations. Based on the maps, the soil moisture distribution of before irrigation was classified into two classes: low and moderate at about 50% coverage each, while 100% of the greenhouse area was within the high soil moisture class for after irrigation. The statistical results demonstrate that both soil moisture data before and after irrigation are different, with the mean soil moisture content increased by 8.73%, thus proving that irrigation systems installed in the greenhouse work effectively by providing ample water to the soil to achieve high soil moisture content in the greenhouse.
      3  46