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AIM: To study the water holding capacity of garden soil and roaasiae so., EXPERIMENT-I, REQUIREMENTS, Garden soil, roadside soil, filter paper, small tin boxes with perforated bottom, filter n, balance, petridishes, oven, water etc., pap, Tin box, Roadside soil, Garden soil, Water, Petridish, Fig. 3.1. Experiment to study water holding capacity of soils.

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weight of Place the filled in them, bottom, place filter in the of the tins and weigh Now fill garden, iltered out in the the of water stops the funnel., PROCEDURE, Take the soil samples, allow them to dry and crush them. Take two tin boxes with perforated, po ane of the boxes and roadside soil in the other by tapping to ensure uniform filling. Record the, he unner surfaces of the soils become wet. Now take out the boxes from the petridishes and weigh, them again, when the dripping of water from the tins stops., OBSERVATIONS AND RESULTS, Record the observations and results in the table as follows :, Wt. of, Wt. of, Wt. of, Water hold-, Wt. of box, filled with, soil (Y), Wt. of box, after taking, out from the, petridish (2), S., Soil sample, ing capacity, of the soil, (Z-Y)/, Y-X x 100), water, empty, box (X), No., os, retained by, (х-х), the soil, (X--), Garden soil, 1., 2., Roadside soil, CONCLUSION, Garden soil retains more water and thus has higher water holding capacity than the roadside soil., PRECAUTIONS, 1. Weighing should be done accurately., 2. Weighing of tins after taking out of the petridishes should be done only when dripping of water, has stopped., EXPERIMENT-II, REQUIREMENTS, Garden soil, roadside soil, measuring cylinders, funnels, filter papers, beakers, balance, oven etc., PROCEDURE, Take two funnels and line them with filter paper, Label them A and B. Place them on measuring, yinders. Take 100 gm oven dried sample each of the garden soil and roadside soil. Put the garden son, mier A and roadside soil in funnel B. Pour 100 ml of water in each funnel. Record the volume of

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ore, Funnel, Roadside soil, + water, Filter paper, Garden soil, + water, Measuring cylinders, Water that drained, through the soil, Fig. 3.2. Experiment to study water holding capacity of soils., OBSERVATIONS AND RESULT, Record the observations and result in the table as follows :, Volume of, Volume of, Water holding, capacity of the, soil in percentage, (Y-Z)/X x100, S., Soil types, Weight, Volume of, No., water, water, water, Jo, (X) os, (Y), poured, collected in, retained, measuring, cylinder (2), the soil, (Y-Z), 1., Garden soil, 2., Road side soil, CONCLUSION, Garden soil has a higher water holding capacity than the roadside soil, because the roadsides, has larger quantities of sand and silt., PRECAUTIONS, 1. Weighing of soil samples should be done accurately., 2., Pour water slowly and gently on the soil in the funnel., 3., Record the volume of collected water in the measuring cylinders carefully.