1. Estimate the irrigation interval for mature fruit trees planted at a 4m x7m spacing in a fine sand soil with a total

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1. Estimate the irrigation interval for mature fruit trees
planted at a 4m x7m
spacing in a fine sand soil with a total available water content
(TAW) of 0.06
cm/cm and a managed root zone of 1.0 m. Assume that the average
daily
evapotranspiration is 6 mm/d occurring during the critical bloom
period when
soil water depletion should be limited to less than 1/3 available
water. Each
tree has a single micro-sprinkler that discharges 40 L/h and wets a
circle 4.5
m in diameter. At each irrigation, the soil is filled to field
capacity (FC).
Analyze the given information and calculate the water use per tree,
assuming
the 6 mm application is equally distributed among trees
(20 marks)