Observation

quantity of gas produced is proportional to the amount of

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• 2.8.213 Lysimeter method Lysimeters are containers filled with soil and where provisions are made to control the weight either occasionally

quantity of gas produced is proportional to the amount of water (provided that there is sufficient calcium carbide available) in the sample. When this chemical reaction is carried out in a tight pressure cylinder, the quantity of gas formed can be measured with a pressure gauge. Appropriate calibration of the gauge allows direct reading of the water content in percentage. Equipment using this method has proved to be very useful for field surveys of soil-moisture, where immediate results are required. 26 2.8.213 Lysimeter method Lysimeters are containers filled with soil and where provisions are made to control the weight either occasionally or continuously. The changes in weight can be referred to changes in total soil moisture in the lysimeter. Because of Download 339.27 Kb. Share with your friends: