Mohd Effendi Wasli

Mohd Effendi Wasli
University Malaysia Sarawak · Department of Plant Science and Environmental Ecology

PhD

About

60
Publications
22,513
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391
Citations
Citations since 2017
36 Research Items
246 Citations
20172018201920202021202220230102030405060
20172018201920202021202220230102030405060
20172018201920202021202220230102030405060
20172018201920202021202220230102030405060

Publications

Publications (60)
Preprint
Full-text available
Background Cellulose fibers extracted from printed paper wastes are utilized to synthesize spherical cellulose microspheres via water-in-oil microemulsion and precipitation methods. Span 80 was used as a surfactant and acetic acid as a precipitating agent in the microemulsion and precipitation process to obtain cellulose microspheres. The effects o...
Conference Paper
Full-text available
The Sarawak State Government has appointed Sarawak Timber Industry Development Corporation (STIDC) to spearhead the development of the bamboo industry in Sarawak. Since research on bamboo in Sarawak has received meagre attention and baseline information on the early survival rate and field growth attributes of bamboo are pivotal for the development...
Article
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An effort was carried out to fully utilise fast-growing Acacia hybrid usage in the timber engineering field; however, the research data are still lacking. This paper aims to evaluate the physical and mechanical properties performance between untreated (control) and treated with 10% copper chrome arsenic of Acacia hybrid collected from Daikin Planta...
Article
Full-text available
There is a high expectation for forest ecosystems to provide several ecosystem services simultaneously. In this study, positive relationships between the amount of carbon stock in coarse woody debris (CWD) and the diversity of polypore fungi were examined in six primary stands and 19 secondary stands with different stand ages (12-81 years) of tropi...
Article
Soil Organic Carbon (SOC) has long been known as an indicator of soil health. This study aims to estimate the amount of SOC at Takasago-UNIMAS Educational Forest, a post-construction site, for forest rehabilitation. Since 2018, rehabilitation approaches have been conducted in the UNIMAS campus to restore these land areas via enrichment planting. Th...
Article
Full-text available
Key message Xylem maturation depends on cambial age rather than diameter growth in Shorea macrophylla by the model selections for radial variations in cell length, wood fiber traits, and basic density. AbstractRadial variations in anatomical characteristics and wood properties were investigated in 23-year-old Shorea macrophylla (engkabang) trees pl...
Article
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Sidi MB, Wasli ME, Polly E, Jaffar ANNM, Kalu M, Sani H, Nahrawi H, Elias H, Omar D. 2021. Short Communication: Incidence of insect pest on planted Shorea macrophylla at reforestation sites in Gunung Apeng National Park, Sarawak, Malaysia. Biodiversitas 22: 5162-5168. Incidence of insect pest in Shorea macrophylla (de Vriese) P.S. Ashton had critic...
Article
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In-situ soil assessment such as field soil compaction can often be a helpful approach in help determining soil suitability for certain crops. In this study, an assessment was conducted to characterize the Soil Penetration Resistance (SPR) in planted sago palm (Metroxylon spp.) plantation at different growth of rosette and trunking stages under mine...
Article
Full-text available
The information on soil physicochemical properties is vital for the optimum wood biomass production in forest plantation management. The objective of this study was to determine the topsoil physicochemical properties under different Acacia mangium stand ages and their effect on the growth parameters. Five plots were established randomly within each...
Article
Full-text available
Planting high-quality seedlings with desirable growth attributes are associated with successful survival and growth performance following outplanting. Considering that most tree species from the Dipterocarpaceae family are on the IUCN Red List of Threatened Species, proper conservation of such species is necessary. Very little is known with no clea...
Article
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A large amount of sago pith waste (SPW) produced by the growing sago industry has become an environmental concern. Instead of disposing as waste, SPW could be converted into a hydrogel and used as a seed germination medium. In this study, a hydrogel was prepared from SPW cellulose fibres via crosslinking with epichlorohydrin (ECH). Fourier transfor...
Article
Full-text available
At present, there is little information on the effects of organic amendments on black pepper farms particularly in Sarawak, Malaysia. The objective was to study the effects of organic amendments on selected soil properties, morphological characteristics, and yield of immature vines and its economic viability on immature pepper productions. There we...
Article
Full-text available
Black pepper in Sarawak, Malaysia, is mainly cultivated using the conventional method involving heavy usage of chemical compound fertilizers. Organic soil amendments can reduce the required amounts of chemical fertilizers. So, the objectives of this study were to compare selected properties of soils as well as the physiological performances of matu...
Article
Full-text available
Wasli ME, Ambun DB, Kalu M, Sidi M, Nahrawi H, Elias H. 2020. Assessment on the growth performance of planted Dryobalanops beccarii at reforestation sites after implementation of selective girdling. Biodiversitas 21: 1880-1889. This study was conducted to evaluate the growth performance of planted Dryobalanops beccarii Dyer at reforestation sites a...
Article
Full-text available
Adanan IC, Wasli ME, Perumal M, Ying HS. 2020. Characterization of soil properties in relation to Shorea macrophylla growth performance under sandy soils at Sabal Forest Reserve, Sarawak, Malaysia. Biodiversitas 21: 1467-1475. A study was conducted in the Sabal Forest Reserve, Sarawak, to characterize soil properties in terms of soil morphological...
Article
Full-text available
The aim of this study is to obtain the basic wood properties of planted Borneo ironwood (Eusideroxylon zwageri) from a plantation established about 80 years ago. Stem diameter at 1.3m above the ground, tree height, and stress-wave velocity (SWV) of stem were measured on 36 planted E. zwageri trees. Later, core samples were collected from four trees...
Article
Karyati, Ipor IB, Jusoh I, Wasli ME. 2019. Allometric equations to estimate the above-ground biomass of trees in the tropical secondary forests of different ages. Biodiversitas 20: 2427-2436. The allometric equations for trees of secondary forests of different ages in abandoned lands after shifting cultivation are still rarely available. The object...
Article
Full-text available
Better understanding and implementation of nursery cultural regimes to improve seedling quality with high survival capability and optimal growth potential are one of the pivotal aspects of a successful forest restoration program. An experiment was set to determine the influences of inorganic and organic fertilizers on the morphological quality attr...
Article
Full-text available
Global demand for high-quality rice and healthy food has increased, especially to the affluent and health-conscious consumers. Red rice has been consumed because of its health benefits. Red rice has met the concepts of productivity and quality that emerged to supply the demands for products that improve the eating pattern of its consuming populatio...
Article
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A study was conducted in the Sabal area, Sarawak, to evaluate the physicochemical properties of sandy-textured soils under smallholder agricultural land uses. Study sites were established under rubber, oil palm, and pepper land uses, in comparison to the adjacent secondary forests. The sandy-textured soils underlain in all agricultural land uses ar...
Article
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Soil hardness plays a vital role in evaluating the physical properties of soil structure. With regards to the impact of compaction on practical forest management issues, most report and review forms were available. Thus, the aim of this study was to evaluate the soil condition in riparian forest restoration planted with indigenous species along Kay...
Article
Full-text available
A study was conducted in riparian forest along Kayan Ulu River, Sarawak, Malaysia, to investigate the effects of soil compaction and relative light intensity (RLI) on survival and growth performance of planted Shorea macrophylla. The study sites were stands reforested in different years performance, soil compaction, and RLI were measured. SPD96 tre...
Conference Paper
Soil hardness measurement is recommendable for comprehensive understanding of the soil conditions prevailing in degraded tropical forests. Restoration trials have demonstrated a wide variety of edaphic and climatic conditions by using indigenous species. The aim of this study is to restore the riverbank ecosystem by evaluating the soil condition of...
Article
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Succession is a series sequential processes of the development of floristic community which involves changes in community structure, species composition and diversity over time. The information on tree stand floristic dynamics of various stages of succession in secondary forests in Malaysia is currently lacking. This study was conducted to determin...
Article
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Shifting cultivation practices are regarded as the most important agricultural land-use in the marginal uplands of Sarawak for the livelihood of the rural communities. In response to various socio-economic consequences, previous practices on traditional form of shifting cultivation were altered into much sedentary farming practices. Soil productivi...
Article
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The tree growth is influenced by soil morphological and physicochemical properties in the site. The purpose of this study was to describe correlation between soil properties under various stage secondary forests and vegetation parameters, such as floristic structure parameters and floristic diversity indices. The vegetation surveys were conducted i...
Article
Full-text available
A study was conducted to determine the status of soil properties after enrichment planting in comparison to an adjacent secondary forest and to evaluate the effect of enrichment planting of Shorea macrophylla (de Vriese) on the soil fertility status with special reference to Soil Fertility Index (SFI) and Soil Evaluation Factor (SEF) at Sampadi For...
Article
Full-text available
Sago palm (Metroxylon sagu) is a tropical crop that can survive the acidic conditions of peat soil, which is cultivated at large scale in Sarawak (Malaysia). The performance of sago palm on deep peat is variable, and not all specimens are able to grow to maturity and produce a trunk. It is hypothesised that sago growth may be influenced by peat hum...
Conference Paper
Full-text available
Implementation of effective soil conservation management is vital to manage degraded limestone forest land in the tropics. For the humid tropics of Sarawak, extensive information on soil characteristics of degraded limestone forest lands are essential and required as a guideline for future forest management programmes. Thus, a preliminary assessmen...
Conference Paper
Full-text available
Reforestation and effective soil conservation management is required to restore and manage degraded forest land in tropics. Information regarding the soil characteristics in forest land is essential as a guide in future reforestation programme. The differences in soil characteristics are usually attributed to differences in environmental factors su...
Conference Paper
Full-text available
Tropical forests are considered as the most productive among of all terrestrial ecosystems as they possess the functional roles for biodiversity conservation, world climate enhancement as well as soil conservation (Whitemore, 1998). Forest cover in Borneo was 75.7% in 1973; by 2010, the forest area had been reduced by 16.8 million ha in which, indi...
Article
Full-text available
Reforestation may offer one means of mitigating the processes of forest land degradation and is indispensable in an effort to conserve forest biological diversity in the tropics. Thus, a preliminary assessment was conducted in order to evaluate the survivorship and growth performance of Shorea macrophylla (de Vriese) after enrichment planting for r...
Article
Full-text available
The diameter at breast height (DBH) increments of dominant tree species in a secondary forest can determine forest growth in the area. This study was conducted to investigate the DBH increments of the nine dominant tree species in a secondary tropical forest. A total number of 180 trees representing nine species, seven genera, and six families were...
Conference Paper
Full-text available
Environmental degradation is proceeding at an unprecedented rate in many tropical regions, jeopardizing prospects for conservation of biological diversity and sustainable economic development of agricultural and forest resources (Parrotta 1991). Anthropogenic activities such as timber extraction, shifting cultivation and the establishment of commer...
Conference Paper
Full-text available
Changes in the forest ecosystem induced by human or other organisms will alter the diversity of the tree species and to certain extend the properties of the soil. For instance, soil compaction and erosion occurred as the result of deforestation activities. Hence, necessary action is needed to recover the degraded land areas affected by these activi...
Conference Paper
Full-text available
Rapid population expansion throughout decades has put tremendous pressure on the agricultural land resources across the globe including Malaysia. With increasing cases of land degradation, the awareness in conserving the soil resources slowly gained attention from policymakers and public society. Soil quality indicators were developed by scientists...
Article
Full-text available
Implementation of effective soil conservation management is required in order to rehabilitate and manage degraded forest land in the tropics. For the humid tropics of Sarawak, Malaysia, extensive information on the soil characteristics for rehabilitation of degraded forest lands is essential to guide future forest management programme. In this stud...
Conference Paper
Full-text available
Soil fertility status can be estimated by using appropriate soil quality indices in order to provide fundamental information on the land suitability for reforestation activities. A study was conducted to characterize the soil physicochemical properties and to clarify the current soil fertility status using soil quality index for estimating soil fer...
Conference Paper
Full-text available
The assessment on relationship between soil properties and edaphic factors in the reforestation site is important to provide information on soil productivity and type of species preferences on degraded site. Hence, this information was vital for planning rehabilitation program at degraded area. The objectives of this study were to identify the soil...
Conference Paper
Full-text available
Shifting cultivation of upland rice has been widely practiced by rural population in Sarawak for self-subsistence. However, recent depletion of arable land for agriculture caused by drastic land use changes resulted in transition of traditionally practiced single year cultivation to continuous multiple years of cultivation practices. Thus, present...
Conference Paper
Full-text available
A preliminary assessment on the soils in reforestation sites at Sampadi Forest Reserve, Sarawak was conducted to clarify and compare the effects of enrichment planting on the soil physicochemical properties within the reforested areas and adjacent secondary forest. Reforestation areas which were planted with Shorea macrophylla de Vriese by line pla...
Article
This study was conducted in an industrial Acacia mangium plantation in Sarawak, Malaysia, to investigate the effects of planting and harvesting A. mangium on soil morphological and physicochemical properties. In A. mangium sites, the disruptive effect of planting practices extended to morphological properties in subsoil layers. The A horizon redeve...
Article
Full-text available
Reforestation of degraded areas in Sarawak, Malaysia is vital in an effort to conserve the dynamic forest resources in Borneo. A preliminary assessment was conducted in providing the information on the growth performance and survival rate of planted indigenous Dipterocarp species (Dryobalanops beccarii Dyer) for reforestation purpose in Sarawak. In...
Conference Paper
Full-text available
Information on the soil properties under artificial forest initiated after reforestation activity is important in order to understand the ecological information as a useful tool as guidelines for future reforestation activities, especially in the humid tropics. In this study, a preliminary survey and assessment was conducted in order to determine t...
Conference Paper
Full-text available
At present, the depletion in arable lands for shifting cultivation practices in Sarawak has led to modification of traditional swidden land into a sedentary form of agricultural practice. Along with incorporation of agrochemicals for crop cultivation and short term fallow system, such practice may lead to environmental degradation especially on the...
Conference Paper
Full-text available
A study on the growth performance and survival rate of planted Shorea macrophylla of different age stands was conducted at Sampadi Forest Reserve, Sarawak. The objectives of this study were to assess the growth performance and survival rate of planted S. macrophylla under reforestation activities that were implemented by Forest Department, Sarawak...
Conference Paper
Full-text available
Population expansion and the need of cash income result in intensified upland agricultural practices globally. Even though efforts are progressing towards sustaining the agricultural practices in upland areas, however, limited studies discuss on the present condition of upland agricultural practice. This study discusses present soil fertility statu...
Article
Full-text available
A study was conducted to characterize soil properties of a rehabilitated-degraded forestland and an adjacent natural forest in two major forest types, representing the lowland and hill-dipterocarp forests at Bidor and Kinta Forest Reserves, respectively. Twelve soil profiles were dug at both sites. At Bidor site, the soil profiles were under rehabi...
Article
Full-text available
This study aims to assess the soil nutrient status and growth performance of selected six dipterocarp species namely Dryobalanops aromatica , Hopea nervosa , Neobalanocarpus heimii , Shorea parvifolia , S. assamica and S. leprosula and three non-dipterocarp species of Azadirachta excelsa , Cinnamomum iners and Intsia palembanica were performed six...
Article
This study discusses soil fertility under perennial cash crop farming (para rubber, Hevea brasiliensis; black pepper, Piper nigrum; oil palm, Elaeis guineensis) conducted by local farmers and an oil palm estate in an upland area of Sarawak, Malaysia, in comparison with the surrounding secondary forests. In the farmlands of the local farmers, rubber...
Article
Full-text available
This study was conducted in order to evaluate the vegetation conditions and soil fertility status of fallow lands under intensive shifting cultivation systems in the Engkari river area in Sarawak, Malaysia. The shifting cultivation by the several Iban communities selected at Engkari area for upland rice farming were currently being conducted with 2...
Article
A study was conducted in the rehabilitation of degraded forestland in the Bukit Kinta Forest Reserve, Perak, Peninsular Malaysia with two main objectives: (1) to assess the growth performance of two indigenous dipterocarp species, Shorea pauciflora (King) and S. macroptera (Dyer) planted under various line planting widths and gap planting openings...
Article
Full-text available
ABSTRACT Site selection methods for shifting cultivation of the Iban were studied at five longhouses in the Mujong River area of Sarawak, Malaysia with special reference to their knowledge of secondar y vegetation. Shifting cultivation practices in the area were more intense than reported in previous studies and were conducted with one-time...
Article
Full-text available
Soil properties under secondary forests were studied in relation to vegetation conditions to clarify the site selection method for shifting cultivation of the Iban in Sarawak, Malaysia. Soils and vegetation were surveyed at 25 suitable sites and 17 unsuitable sites for shifting cultivation, classified by the landowners based on their perceptions th...
Article
Full-text available
The main purpose of this paper is to clarify the similarities and differences in agricultural practices among the Iban people who live in geographically adjacent areas but different countries, Malaysia and Indonesia. The research areas are Lubok Antu in Sarawak, Malaysia and Lanjak in West Kalimantan, Indonesia. As the Iban people in these areas ar...

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Projects (2)
Project
1. To evaluate the growth performance of indigenous species under rehabilitation 2. To determine the effect of enrichment planting on soil properties