Soil characterization in the lysimeter tanks of the University of the Philippines Los Baños Central Experiment Station, Laguna, Philippines

Date

6-2016

Degree

Bachelor of Science in Agricultural and Biosystems Engineering

Major Course

Major in Land & Water Resources Engineering

College

College of Engineering and Agro-Industrial Technology (CEAT)

Adviser/Committee Chair

Joan Cecilia M. Catubig-Casila

Restrictions

Restricted: Not available to the general public. Access is available only after consultation with author/thesis adviser and only to those bound by the confidentiality agreement.

Abstract

The soil in the lysimeter area at the Central Experiment Station was characterized. Samples were taken inside and outside the twelve lysimeter tanks for texture and chemical properties analysis. Soil texture analysis resulted to sandy loam. The soil in all tanks had a pH value of 5.9, consistently high level of phosphorus and varying potassium level. Two representative soil samples from inside and outside the tanks were sent to International Rice Research Institute for analysis using pressure plate. The values generated using Retention Curve program resulted to Field Capacity ranging from 0.38 to 0.39 and Permanent Wilting Point of 0.16 to 0.17. The hydraulic conductivity of the soil before and after harvest ranged from 9.3 E -06 cm/s to 1.4 E -05 cm/s and 9.4E-06 to 1.9E-05 respectively which falls under sandy loam soil. The apparent and real specific gravity of the soil before the crop was planted ranged from 1.29 to 1.47 and 2.83 to 2.93 respectively, while values were 1.26 to 1.29 and 2.58 to 2.61 after the crop was harvested. The porosity ranged from 48% to 55% before and after planting. The soil inside the lysimeter tanks had relatively clos values from the soil outside the tank. Due to consistency in soil properties, the lysimeter area can therefore be treated as representation for field conditions and a suitable site for research.

Language

English

Location

UPLB College of Engineering and Agro-Industrial Technology (CEAT)

Call Number

LG 993.5 2016 A2 /G66

Document Type

Thesis

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