Year: 2019 Vol.: 68 No.: 2
Authors: Anna Ma. Lourdes S. Latonio, Isidoro P. David, and Zita V.J. Albacea
A basic issue in designing a procedure on selecting a sample is how well the sampling frame corresponds to the target population from where the sample will come from, making the construction of the sampling frame a vital aspect in the development of a sampling design. The main purpose of this paper is to evaluate and compare different official data sources to be able to combine them into a sampling frame appropriate for use in household-based livestock operations surveys for major livestock types (carabao, cattle, goat, and swine) in the Province of Nueva Ecija. The data values of different official data sources available such as the Philippine Carabao Center Inventory (PCCI), Livestock and Poultry Survey (LPS), Barangay Agricultural Profiling Survey (BAPS), and Local Government Unit (LGU) records during 2007-2010 for the province were compared. Scatter plots, strengths of relationships and relative differences between observations on the same variables were analyzed. Specifically, relevant barangay level data common in the different surveys were used to perform the comparisons. Based on the assessment of the different data sources, a barangay level Household Based Livestock Frame (HBLF) was constructed. The constructed HBLF consists of 849 barangays as basic sampling units, each with attached livestock related information, and auxiliary information such as total rice area (TRA) and number of rice growers (NRG). The constructed HBLF can be used in the development of separate or combined sampling designs for household-based livestock surveys in the Province of Nueva Ecija.
Keywords: Agriculture, livestock, sampling, sampling frame, livestock inventory