1. The concentration of nitrate-nitrogen in plant tissue of forage samples such as barley or oat is generally highest during which part of the day.
morning
mid-day
late afternoon
early evening

2. The shelf life of chemicals and reagents used in the Nitrate QuikTest is approximately 3 years.
True
False

3. The reagent used as the color indicator for the Nitrate QuikTest For Forages is:
sodium hypochlorite
polyvinyl chloride
diphenylamine
dichromium acetate

4. Which part of a plant sample should be selected for testing when a producer brings a dry hay sample into the office for a Nitrate QuikTest For Forages?
approximately 6 small leaves
the lowest nodes of 5-6 stems of the plant material
any portion of the plant material
approximately 3 flag leaves

5. The typical range in nitrate-nitrogen concentration of plant tissue samples which should be fed with caution or mixed with other forage known to be low in nitrate-nitrogen concentration is:
tissue nitrate-nitrogen concentration less than 10 ppm (= 0.0044% NO3)
tissue nitrate-nitrogen concentration less than 100 ppm (= 0.044% NO3)
tissue nitrate-nitrogen concentration less than 350 ppm (= 0.44% NO3)
tissue nitrate-nitrogen concentration less than 3,500 ppm (= 4.4% NO3)

6. The concentration of nitrate-nitrogen in forage tissue samples of barley or oat is usually highest at the lowest node of the main stem and progressively less at higher elevations in the stem.
True
False

7. The materials and reagents used in the Nitrate QuikTest are not harmful and require little or no precautionary behavior when handling.  
True
False

8. The Nitrate QuikTest provides an accurate, quantitative measure of plant tissue nitrate-nitrogen concentration.
True
False

9. When the laboratory results of a nitrate analysis of forage tissue sample are reported, the value will always be less as ‘nitrate’ (NO3) than as ‘nitrate-nitrogen’ (NO3-N).
True
False

10. The recommended procedure for dealing with human contact with the reagents used in the Nitrate QuikTest For Forages is:  
 

11. A representative hay sample should always be sent to a diagnostic laboratory for confirmation of test results when the Nitrate QuikTest indicates an elevated nitrate-nitrogen level.
True
False

12. Presence of potentially high or elevated concentrations of nitrate-nitrogen are indicated by development of what color when using the Nitrate QuikTest:
absence of color
deep green color development in reagent/tissue mixture
dark brown color development in reagent/tissue mixture
dark blue or purplish blue color development in reagent/tissue mixture

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