Nitrogen Testing in Soil Quiz

What is the purpose of adding nitrogen extracting solution to the soil samples?

• To increase the volume of the soil

• To decrease the pH of the soil

• To extract nitrogen from the soil

• To color the soil for better visibility

What is the first step in the nitrogen testing process described in the video?

• Shaking the test tubes

• Observing the color change

• Adding soil to the test tubes

• Adding nitrogen extracting solution to the test tubes

What is the next step after adding soil to the nitrogen extracting solution?

• Immediately test for nitrogen

• Cap and shake the test tubes

• Heat the solution

• Let the tubes sit undisturbed

How is the clear liquid transferred to a new test tube?

• Using a funnel

• Pouring directly

• Using a pipette

• Using a spoon

What method is used to ensure the pipette does not contain air before use?

• Shaking it

• Filling it with water first

• Squeezing it before inserting into the liquid

• Heating it slightly

What is the purpose of adding nitrogen indicator powder to the test tube?

• To clean the test tube

• To dissolve the remaining soil

• To change the color based on nitrogen levels

• To create a reaction with the soil

How long should the test tubes be shaken after adding the indicator powder?

• 3 minutes

• 2 minutes

• 1 minute

• 5 minutes

After adding the nitrogen indicator powder, what is the next step?

• Let the test tube sit for an hour

• Test for other chemicals immediately

• Shake the test tube for three minutes

• Add more soil to the test tube

What does a hot pink color indicate in the nitrogen test?

• A low level of nitrogen

• A medium level of nitrogen

• A high level of nitrogen

• No nitrogen present

What indicates a low level of nitrogen in the nitrogen test?

• Dark pink color

• No color change

• Bright pink color

• Light pink color