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Given below are two statements
Statement (I) : Single crop coefficient approach is used for surface irrigation methods.
Statement (II) : Dual crop coefficient approach is used for micro irrigation methods
In light of the above statements, choose the most appropriate answer from the options given below.
EXPLANATION
Convective Heat Transfer & Psychrometrics
- Crop Coefficient Approaches in Evapotranspiration (FAO-56):
- Statement (I): Single crop coefficient approach is used for surface irrigation methods. $\implies$ Correct.
- In surface (border, furrow, basin) irrigation where the entire soil surface is wetted periodically, crop transpiration and soil evaporation are combined into a single time-averaged crop coefficient ($K_c$), yielding $ET_c = K_c \cdot ET_0$.
- Statement (II): Dual crop coefficient approach is used for micro irrigation methods. $\implies$ Correct.
- In drip/micro irrigation where only a small fraction of the soil surface is wetted frequently, $K_c$ is partitioned into basal crop transpiration ($K_{cb}$) and soil surface evaporation ($K_e$), yielding $ET_c = (K_{cb} + K_e) ET_0$.
- Conclusion: Both Statement (I) and Statement (II) are correct (Option 1).
Correct option: (1) Both Statement (I) and Statement (I) are correct
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