Problem $4$: Problem $4$:

A$.$ Determine the reference crop evapotranspiration, crop water need and irrigation water need based on the

following data.

General data

Latitude: $80$ North

Crop data:

B$.$ Determine the Irrigation schedule using Simple Calculation Method based on: $(1)$ total growing period; $(2)$

months of peak irrigation water need; $(3)$ combination of $2$ schedules $1$ and $2.$

Use FAO's classification of loamy soil for net irrigation depth and approximate root depth for the $2$ crops $($potatoes

and cotton$)$ and field application efficiencies of surface, furrow and drip irrigation methods.

A$.$ Determine the reference crop evapotranspiration, crop water need and irrigation water need based on the

following data.

General data:

Latitude: $80$ North

Crop data:

Crop Planting date Total growing season

Climatic data:

Relative humidity $($year$-$round$)$ : medium

Windspeed $($year$-$round$)$ : medium

B$.$ Determine the Irrigation schedule using Simple Calculation Method based on: $(1)$ total growing period; $(2)$

months of peak irrigation water need; $(3)$ combination of $2$ schedules $1$ and $2.$

Use FAO's classification of loamy soil for net irrigation depth and approximate root depth for the $2$ crops $($potatoes

and cotton$)$ and field application efficiencies of surface, furrow and drip irrigation methods.