Basic Soil Principles through Basic Soil Fertility

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Course #3214

Post-Program Quiz for Agricultural NM CEU's

Complete this quiz with the information you learn from the Webinar presentations.

You must answer all the items correctly and submit this form to MDA to earn 2 Maryland Agricultural Nutrient Management continuing education credits. Circle the correct answer for each question. You must also include your printed name and the number as shown on your Maryland NM certificate or applicator voucher, your signature, date completed and your contact information.

Email *

Basic Soil Principles through Basic Soil Fertility- Webinar

Select the video to play the webinar. If you would like to make the webinar larger, select the "Youtube" logo in the bottom right corner and it will open the webinar in a new window.

First Name *

Last Name *

MD Nutrient Management Certificate Number *

True or False: In the most expansive sense "soil fertility" is about the suitability of the overall soil environment for the successful growth of target plants. "Soil fertility", the way it is typically used, is merely about pH adjustment and nutrient provision. *

True

False

Which of the following is not an essential plant nutrient? *

Carbon

Aluminum

Phosphorus

Magnesium

A soil is more likely to retain nutrients if it has which of the following qualities? *

High cation exchange capacity (CEC)

Low organic matter content

High quartz sand content

High silt content

What is the CEC of a soil with 4 cmoles of + per kg from H, 10 cmoles of + per kg from Ca, 6 cmoles of + per kg from Mg, 1 cmole of + per kg from Na, and 5 cmole of + per kg from K? *

10 cmole + / kg soil

16 cmole + / kg soil

23 cmole + / kg soil

26 cmole + / kg soil

Some acid cations- *

A: May rip apart water molecules releasing H+s

B: Would be more likely to have a charge of 3+ than a charge of 2+

Both A and B

Neither A nor B

Soil pH must be maintained in proper range for crops to provide maximum nutrient availability. What pH below is a the closest to ideal for most agronomic and horticultural crops? *

4.5

6.5

5.2

In acidic, high weathered soils like those in Maryland, one can estimate the ability of the soil to hold phosphorus using which of the following calculations? *

The ratio of P to the water content of the soil

The sum of P and Nitrogen (N) in the soil

The ratio of phosphorus to the sum of iron (Fe) and aluminum (Al) in the soil

The salt content divided by the P concentration

True or False: Phosphorus is often lost in a gaseous form from the soil. *

True

False

Which equation shows the conversion back and forth between ammonium and ammonia? *