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Contact Us
Animal & Range Sciences Extension Service
P.O. Box 172900
Bozeman, MT
59717-2900
Email Us
Tel: (406) 994-3722
Fax: (406) 994-5589
Location: 119 Linfield

MSU Extension Service
Doug Steele, Vice Provost & Director
406-994-6647
> Department > Home > Forage
Forage Extension Program

Post-Test for Certification CY 2008
(First Time Applicants ONLY)
Step 3

1. The materials and reagents used in the Nitrate QuikTest For Forages are not harmful and require little or no precautionary behavior when handling.
    True
    False
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:
    diphenylamine
    polyvinyl chloride
    dichromium acetate
    sodium hypochlorite
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 on several stems
    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 greater than 10 ppm (= 0.0044% NO3)
    tissue nitrate-nitrogen concentration greater than 100 ppm (= 0.044% NO3)
    tissue nitrate-nitrogen concentration greater than 350 ppm (= 0.15% NO3)
    tissue nitrate-nitrogen concentration greater than 3,500 ppm (= 1.5% 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 concentration of nitrate-nitrogen in plant tissue of forage samples such as barley or oat is generally highest during which part of the day:
    mid-day
    late afternoon
    early evening
    early morning
8. Presence of potentially high or elevated concentrations of nitrate-nitrogen are indicated by development of what color when using the Nitrate QuikTest For Forages:
    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
9. A representative sample of several subsamples of the forage material in question should always be sent to a diagnostic laboratory for confirmation of test results when the Nitrate QuikTest For Forages indicates an elevated nitrate-nitrogen level.
    True
    False
10. 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
11. The Nitrate QuikTest For Forages provides an accurate, quantitative measure of plant tissue nitrate-nitrogen concentration.
    True
    False
View Text-only Version Text-only Updated: 11/08/2007
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