AIM: To study the pH and water holding capacity of different soil samples.
REQUIREMENTS: Soil samples, measuring cylinders, funnel, filter papers and pH indicator.
Take 2 funnels and line them with filter paper
Put these funnels in a measuring cylinder
Put the 2 soil samples in separate funnels
The weight of soil sample should be same in both (25g)
Pour equal amount of water in both funnels (25 ml)
Let the water drip in the cylinder
Not the volume of water collected
The volume of water collected in cylinder of sample A was more than sample B
Also, the pH of sample A was higher
Volume of water retained by soil = Vol. of H2O poured-Vol. of H2O collected in cylinder
Water holding capacity = (Vol of H2O retained/Vol of H2O required) x 100
Soil sample A is roadside soil and sample B is garden soil as sample B has more water holding capacity.
The water should be poured slowly
The measuring cylinders should be properly calibrated.