In Lysimeter,following observations made for calculation of evapotranspiration are as under:
$W_{1}$ =Original weight of container + Soil+ Plant + Water moisure
$W_{2}$ =Water collected at bottom
$W_{3}$ =Water added
$W_{4}$ =final weight of container content
The evapotranspriation is:

W_{1} + W_{2} - W_{3} - W_{4}

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W_{1} - W_{2} + W_{3} - W_{4}

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W_{1} - W_{2} - W_{3} + W_{4}

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None of above

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Solution

The correct option is B $W_{1} - W_{2} + W_{3} - W_{4}$
$W_{1} - W_{2} + W_{3} - W_{4}$

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