Ross wants to cultivate plants that require high levels of groundwater. however, the groundwater level on his field are very low. he uses perforated pipes to raise the groundwater level on his field. which irrigation system did he use? a. trickle irrigation b. variable flow irrigation c. surface irrigation d. drip irrigation e. sub-irrigation

Ross used drip irrigation to raise the groundwater level on his field.

Option D

Explanation:

When the level of the ground water is low sprinkler system is used to water the fields. One such sprinkler system is the Perforated pipe system. The perforated pipe system is installed on the surface or below ground for drip irrigation.  

In this method the pipes are drilled with holes or nozzles through which water is sprayed under pressure. Proper spacing is done between the perforations and it is kept near the roots so that the soil stays wet all day long. As it is directed to the roots the transpiration rate is reduced enabling the roots to absorb required water.

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