How to solve a Soil Physics problem of ET determination from weighing lysimeter data?

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Martin Goodchild

Hi, with your lysimeter area of 1m2, 1mm of rain over that area will equate to 1 ltr or 1 kg of water. So I would say your ET is 150mm. I hope that helps

Ashok Kumar Singh

In this case ET will 150 {120 +30 (irrigation and rainwater)} mm only. increase or decrease in weight in lysimeter by one kg will be equal to one mm in depth.

Mohammad Hadi Rad

Hi, you need to consider the depth of the lysimeter and the amount of water drainage from the lysimeter as well as the condition of the plant growth. Excess weight may be less noticeable due to plant growth.