EXERCISE No. 60 

 SOIL DRAINAGE 



Object : To show the effect of drainage on soil. 



Material: Two empty flower pots, paraffin, and two 

 healthy growing flowers. 



Method: Number the flower pots 1 and 2. Plug up 

 hole in each with melted paraffin so that no air can pass 

 through. In the bottom of No. 2 put about one inch of 

 pebbles or coarse sand. Fill each pot nearly full with a 

 mixture of good soil and sand, three parts of soil to one part 

 of sand. Place one of the healthy flowers in each pot. 

 The flowers should be of the same size. The soil should be 

 packed around them so that they will grow. Water the 

 flowers until the soil is saturated; then place the pots in a 

 sunny window. Place a thermometer in each pot with the 

 bulb about two inches below the surface of the soil. Make 

 note of the temperature every day for two weeks or until the 

 plants start to grow. 



Conclusion : When the above conditions exist in the soil 

 of fields, in which field will the water penetrate more easily? 

 In which field will the temperature be higher? After these 

 records have been taken, the plants should be watered and 

 left growing for a month. At the end of this time which has 

 developed the better root system? In which pot do the roots 

 go the deeper? Why? What is the effect of drainage on 

 plant growth? -..: 



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