Certified Crop Advisor Practice Exam

Which irrigation method involves applying water at low volume?

1. Furrow

2. Drip

3. Surface

4. Sprinkler

The correct answer is: Drip

Drip irrigation is characterized by its application of water at low volumes directly to the root zone of plants. This method utilizes a network of tubing or pipes with emitters that release water slowly and precisely, minimizing wastage and reducing evaporation losses. The primary advantage of drip irrigation is its efficiency; it allows for targeted watering that supports optimal crop growth while conserving water resources. In contrast, furrow irrigation delivers water through trenches or furrows in the field, typically applying larger volumes over the surface area, which can lead to more runoff and higher evaporation rates. Surface irrigation involves flooding fields, which can lead to significant water loss and is less precise in water placement. Sprinkler irrigation distributes water through an elevated system of pipes and is generally more variable in the volume applied, depending on the pressure and design but does not focus on low-volume delivery like drip irrigation does. Thus, drip irrigation stands out for its ability to apply water in small, controlled quantities directly to where plants need it most.