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Database of Abstracts of Theses and Dissertations of SEAMEO SEARCA Scholars
Showing 1441–1450 of 1,513 records
"A Survey of Diamond-Back Moth (Plutella xylostella Linn.) Populations for Resistance to Insecticides in the Philippines"
The resistance of 12 Plutella populations to DDT and to five organophosphorus insecticides, usng third-instar larvae, was studied. As shown by the resistance factor (FC), the College and Kanlaon Putella populations were resistant to DDT, while... Read more.MS (University of the Philippines Los Baños)"An Econometric Model of Philippine Wood Production and Export"
The study attempted to make an econometric analysis of the production and export aspects of the forestry sector which consists of four categories or industries: logs, lumber, plywood0veneer and pulp-paper. The Cobb Douglas production... Read more.MS (University of the Philippines Los Baños)"Correlates of productivity among Tobacco Farmers of Isabel."
Main objective of the study were to identify some socioeconomic factors significantly related to farmers’ productivity and to develop a productivity model for tobacco farmers. An interview schedule was used to gather... Read more.PhD (University of the Philippines Los Baños)"Design Parameters of a Laboratory Rice Stripper Using Transverse Belt"
A laboratory stripper model was constructed to study the possibility of stripping rice with the use of a transverse belt. The effect of various factors affecting the performance was also studied. The setup consisted of the trolley, the... Read more.MS (University of the Philippines Los Baños)"Establishment of Optimum Processing Parameters for Canned Tuna"
Heat penetration, thermal death time and cut-out tests were conducted to establish mathematically the optimum processing time for solid packed canned yellowfin tuna (Neothunnus macropterus) in oil. The heat penetration test showed the slope... Read more.MS (University of the Philippines Los Baños)"Further Assessment of Rice Yield Loss Due to Bacterial Leaf Blight"
The study was conducted to determine the effect of Xanthomonas oryzae (Uyeda et Ishiyama) Dowson on the grain yield of three nonseasonal rice varieties, IR- 8, C4-63(G) and IR-20, the susceptible, intermediate and resistant varieties... Read more.MS (University of the Philippines Los Baños)"Manganes-Phosphorus Interactions in Soils and in Soybean (Glycine max Merrill)"
Laboratory and pot experiments were conducted to study the relationship between manganese (Mn) and phosphorus (P) in aqueous, soil and soil-plant (soybean) systems. Results showed that aqueous system, Mn and P decreased simultaneously and... Read more.PhD (University of the Philippines Los Baños)"Morphological and Physiological Studies on Eleochoris dulcis (Burm. F) Trin. I. Gross Morphology of Eleochoris dulcis (Burm. f.) Trin under Saline Condition."
The study aimed to obtain more basic information on the morphology and anatomy of plant and to assess its crop potential when grown under saline condtion as affected by fertility levels of the soil. Culm and scale cross section showed the... Read more.MS (University of the Philippines Los Baños)"Nondestructive Testing for Strength and Elasticity of Some Philippines Woods by Forced Vibration."
The study was conducted to correlate dynamic modulus of elasticity (Ed) with static modulus of Elasticity (Es) and modulus of rapture (R) of some Philippines woods. The testing involved a nondestructive method using sound waves as the existing... Read more.MS (University of the Philippines Los Baños)"Relationship of Feed Intake, Daily Gain, Feed Efficiency and Age with Body Weight in Growing Pigs"
Two kinds of rations were fed for $ months to 149 growing pigs consisting of seven breeds or strain, divide into boars, glits and barrows. Regresion analysis was then made for easch ration, breed/strain and six groups of individually fed pigs... Read more.MS (University of the Philippines Los Baños)