9. EXPERIMENT

We collected the samples of soil from

1. Road side
2. Garden
3. Water logged area

We filled the different soils in plastic bottles with a hole at the bottom. Then we pour down equal amount of water in each. We found that:

1. Soil with pores absorbs more water.
2. Garden soil has more pores and thus it absorbs more water than the road side soil which is well rammed.
3. Waste soil looses it porosity due to clay particles and the algae.

To increase the porosity of soil we conducted another experiment. (photographs enclosed)

We dug out a pit of 4'x3'x4' in our garden. Filled it with coarse material:

1.      Brick ballast for the first 1'.

2.      Stone grit for another 1'.

3.      Coarse sand-9''.

4.      Fine sand-9''.

5.      Soil-6''.

Then we filled water over the sunshade of the window of our house.

Volume of the water = 270x40x15cc

                                  = 150000cc

                                  = 150 litre.

We connected the overflow pipe (2'' f ) with a 3/2''f   plastic pipe with the help of reducer. The other end of the plastic pipe was connected with water sprinkler. We fixed the sprinkler in the pit. Filled the pit with 40 litre water. 

Now we opened the overflow pipe, which was earlier choked. The sprinkler started working. Simultaneously, we started filling water in the pit with the help of another pipe @ 4 litres/ min.

Sprinklers emptied the sunshade water in 142 min (150l/ 142 min=        1l/min)

Thus there was extra 5 litre of water in a minute in the pit. When we checked the level of the water with the help of a stick, we found the level same.

Thus we conclude that the pit absorbed the water approximately with the same rate as it recieved.

When we conducted the same experiment over thee normal garden soil and found its rate of absorption to be far less.

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