17.4.7. Lysimeter Technique (for Evapotranspiration)

Try these first

1. 1.

   What does a lysimeter measure?

   Hint

   Think of what occurs when water evaporates from the soil and plants.

2. 2.

   Name one type of lysimeter.

   Hint

   Consider how different lysimeters could work.

3. 3.

   What does a lysimeter directly measure?

   • Rainfall
   • Evapotranspiration
   • Soil nutrient levels

   Hint

   Think about what interactions are being measured.

4. 4.

   True or False: Lysimeters can only be used in research settings.

   • True
   • False

   Hint

   Consider the application of technology in everyday farming.

5. 5.

   Design a research project that utilizes lysimeters to study the impact of irrigation frequency on crop yield. Include methods of data collection and analysis.

   Hint

   Consider how varying water input might affect evapotranspiration and yield.

6. 6.

   Calculate the evapotranspiration from a lysimeter if it recorded a 50 mm water loss over 30 days with a crop cover coefficient of 0.8. What adjustments would you recommend for irrigation?

   Hint

   Think about how crop cover affects the actual water needs.