Edaphic Factor Lab Report
EDAPHIC FACTORS AND THEIR ROLES IN THE BIOTIC WORLD
Kristilynn C. Saavedra
INTRODUCTION Edaphic factors aids in shaping the biotic world. These factors greatly affect the distribution, composition and the habit of the vegetation. Ecologists have appreciated the major role of these edaphic factors in creating a habitable environment within the plants and their associated organisms live, the interaction, reproduction and divergence over time. Soil is the medium where plants generally obtain nutrients and water. This is also the principal factor that controls the fate of water and ground water availability, nature’s recycling system, the decomposition of waste products of animals and plants and transforming these end- products into basic elements (Rajakaruna and Boyd,
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The soil was placed in a beaker, added an equal volume of 0.01M CaCl2 and was stirred vigorously for 15 seconds making the mixture thick and uniformly slurry. The sample was set aside for 30 minutes. After, it was briefly stirred to incorporate any water that has separated. Using a pH meter, the measurement was taken by gently swirling the probe in the slurry, making sure that the probe was well immersed in the soil. Three trials were done and the average pH was taken. The data for soil conductivity was gathered by crushing sample of air – dried soil until it passes the sieve. In a 250 mL flask, 20g of soil was weighed; 100 mL of distilled water was add and was shaken vigorously for 15 minutes. The suspension was placed in a flat surface for the heavy particles to fully settle. Using a conductivity meter, soil conductivity was measured making sure that the probe of the said device was well immersed in the suspension. Three trials were done and average conductivity was calculated. This was done to all type of soil sample. The data was recorded as milliSiemens per meter (mS/m).
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