41.7.3. Electrical Resistance Blocks

Try these first

1. 1.

   What do electrical resistance blocks measure?

   Hint

   Think about what plants need to grow.

2. 2.

   Name one material that electrical resistance blocks can be made of.

   Hint

   One is a type of mineral.

3. 3.

   What do electrical resistance blocks primarily measure?

   • Temperature
   • Soil moisture
   • pH levels

   Hint

   Think about what plants need most.

4. 4.

   True or False: Higher moisture content results in higher electrical resistance in soil.

   • True
   • False

   Hint

   Recall how water affects conductivity.

5. 5.

   Given the moisture readings from several electrical resistance blocks, how would you determine the best time to irrigate a field?

   Hint

   Consider using graphs to visualize the data.

6. 6.

   Design an experiment to compare the effectiveness of electrical resistance blocks with another soil moisture measurement technique.

   Hint

   Think about the variables you need to control.