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178 articles for “Tropical”
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Research ArticleOpen accessEvery word in the titleEFFECT OF LIMING AND FERTILIZER APPLICATION IN HEMIC AND SAPRIC OF TROPICAL PEAT: PHOSPHORUS MINERALIZATION, INFRA-RED SPECTROSCOPY AND MICROSCOPYAmeera Abdul Reeza, Aminuddin Hussin, Ahmad Husni Mohd Hanif, Mohd Aspollah Md. SukariThis study was conducted to investigate the changes in nutrient level P as well as in the structural and functional groups upon the decomposition of Hemic and Sapric peat material due to application of lime and fertilizers. The peat materials were left to decompose for 8 weeks under laboratory incubation and samples were taken for the determination of extractable P … …American Journal of Agricultural and Biological Sciences, Vol. 9, Issue 3 · 31 Mar 2014 · 8,389 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleAssessing Soil Biological Properties of Natural and Planted Forests in the Malaysian Tropical Lowland Dipterocarp ForestDaljit Singh Karam, Arifin Abdu, O. Radziah et al.Problem statement: A study was conducted to evaluate and compare the soil biological properties of a natural forest and an 18-year-old stand of Shorea leprosula in Chikus Forest Reserve, Perak, Malaysia. Approach: Soils were sampled at depths of 0-15 cm (topsoil) and 15-30 cm (subsoil) in six subplots (20×20 m) of natural forest (C1) and of a planted S. leprosula … …American Journal of Applied Sciences, Vol. 8, Issue 9 · 29 Jul 2011 · 7,961 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleEffect of Polypropylene Fibers on the California Bearing Ratio of Air Cured Stabilized Tropical Peat SoilBehzad Kalantari, Bujang B.K. Huat, Arun PrasadProblem statement: Peat soil is well known to deform and fail under a light surcharge load and is characterized with low shear strength, high compressibility and high water content. With the rising demand from the construction industry, utilization of these soils is required and suitable technique needs to be found out for stabilizing them. Approach: Model study had been carried … …American Journal of Engineering and Applied Sciences, Vol. 3, Issue 1 · 31 Mar 2010 · 8,697 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleComparison of Daily and Monthly Results of Three Evapotranspiration Models in Tropical Zone: A Case StudySeyed Reza Saghravani, Sa’ari Mustapha, Shaharin Ibrahim, Elias RandjbaranProblem statement: Evapotranspiration (ET) has crucial role in agricultural activity, water management and hydraulic engineering. Recently many forms of the equation have been applied for estimating daily and monthly evapotranspiration around the world. Approach: In this study, the daily and monthly ET was estimated by Penman, Penman-Monteith (P&M) and Hargreaves equation to evaluate general relationships for estimating monthly and daily … …American Journal of Environmental Sciences, Vol. 5, Issue 6 · 31 Dec 2009 · 7,645 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleAdjustment of Peak Streamflows of a Tropical River for UrbanizationAta Amini, Thamer Mohammad Ali, Abdul Halim B Ghazali, Bujang Kim HuatPeak runoff from a catchment is influenced by many factors such as intensity and duration of rainfall, catchment topography, catchment shape, land use and other variables. For a particular catchment, landuse change and other human activities will alter the characteristic of catchment hydrograph. Problem statement: As a result of urbanization, the magnitude of floods occurring in a catchment increased. It … …American Journal of Environmental Sciences, Vol. 5, Issue 3 · 30 Jun 2009 · 7,546 accessesView PDFCite
Research ArticleOpen accessEvery word in the titlePhytoplankton Community of Elechi Creek, Niger Delta, Nigeria-A Nutrient-Polluted Tropical CreekO. A. Davies, J. F.N. Abowei, C. C. TawariProblem statement: Elechi Creek of the Upper Bonny Estuary in the Niger Delta contributes to the Rivers State Fish resources. It is a sink receiving organic anthropogenic wastes from Diobu, Eagle Island and waterfront dwellers of Diobu areas. Fishing, car washing, bathing, swimming and other human activities are constantly going on within and around this creek. Based on these activities, … …American Journal of Applied Sciences, Vol. 6, Issue 6 · 30 Jun 2009 · 7,968 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleExperimental Investigation on Geomechanical Properties of Tropical Organic Soils and PeatBujang B.K. Huat, Afshin Asadi, Sina KazemianProblem statement: Organic soils and peat were believed to be geotechnically problematic due to their very high compressibility, very low shear strength and difficult accessibility. Although conventional soil mechanics theory could be applied to the soils, it was found that important anomalies existed which required special considerations. Correlations between geomechanical parameters for the soils were known to be important for … …American Journal of Engineering and Applied Sciences, Vol. 2, Issue 1 · 31 Mar 2009 · 10,172 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleNutrient Digestibility and Gas Production of Some Tropical Feeds Used in Ruminant Diets Estimated by the in vivo and in vitro Gas Production TechniquesPaya Hamid, Taghizadeh Akbar, Janmohammadi Hossein, Moghadam Gholam AliSome feedstuffs which used in ruminants diet (corn grain, soybean meal, wheat bran and alfalfa) were analyzed for chemical composition, apparent in vivo nutrient digestibility, in vitro fermentation gas production and metabolizable energy. Chemical composition of test feeds differed in nutrient contents. Initially apparent in vivo digestibility of alfalfa nutrients were obtained then digestibility of nutrients for the other test … …American Journal of Animal and Veterinary Sciences, Vol. 2, Issue 4 · 31 Dec 2007 · 7,667 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleEffect of Feed Additives on the Development of Proteolytic Enzymes of the Tropical Sport Fish Malaysian Mahseer (Tor tambroides-Bleeker) FryK.C.A. Jalal, M. A. Ambak, M.A.B. Abol et al.Tor tambroides fry with a mean of 8.0±0.72 mm standard length (SL) and weighing (W) 0.06±0.01g were stocked at the rate of fifty (50) individuals in each of the fifteen 150l rectangular fibre glass tanks for a period of 5 weeks. The development of proteolytic enzymes (Trypsin and Chymotrypsin) was studied during these feeding treatments. 45% protein diet without additives … …American Journal of Biochemistry and Biotechnology, Vol. 1, Issue 3 · 30 Sep 2005 · 6,999 accessesView PDFCite
Research ArticleOpen accessIn the keywordsImproved Compost Production from Fruit and Vegetable Market Waste: A Case Study in Bagua, Amazonas (Peru)Juan Eduardo Suarez Rivadeneira, Freddy A. Manayay, Wilfredo Ruiz Camacho, Juan Francisco Robles RuizInadequate management of organic solid waste in municipal markets represents a critical environmental challenge in tropical developing regions, where high humidity (>80%) and elevated temperatures (>25°C) accelerate decomposition, generating leachate and greenhouse gas emissions. In Peru, over 50% of municipal waste is organic, yet less than 20% is valorised through composting, highlighting a substantial technological gap. This study evaluated an … …OnLine Journal of Biological Sciences, Vol. 26, Issue 3 · 11 Aug 2026 · 1,262 accessesView PDFCite