Sample quiz questions from each unit

 

Anatomy

Which of the following crops has hypogeal emergence?        

  1. wheat
  2. soybean
  3. redclover
  4. field bean
  5. alfalfa

The main distinguishing feature of the primary root system of dicots is the presence of:

  1. a tap root
    2.
  2. seminal roots
  3. coronal roots
  4. brace roots
  5. crown roots

 

Classification and Identification

Which crop is a member of the Malvaceae family?

  1. sunflower
  2. cotton
    3.
  3. beans
  4. orchardgrass
  5. sugar beet

Which of the following are indigenous to the western hemisphere?

  1. soybeans
  2. alfalfa
  3. most prairie grasses
    4.
  4. wheat
  5. oats

 

Physiology

Cellular respiration results in the net use of:

  1. oxygen and carbon dioxide
  2. water and carbon dioxide
  3. ATP and carbon dioxide
  4. ATP and water
  5. oxygen and carbohydrates

An advantage of an open canopied variety of soybeans with upright leaves as compared to a closed canopied variety with horizontal leaves would be:

  1. a smaller percentage of the light would be intercepted
  2. a square inch of the top leaf has a higher photosynthetic rate
  3. light does not penetrate as deeply into the crop canopy
  4. light penetrates deeper into the crop canopy
    5.
  5. the intercepted light is used less efficiently

 

Climate

Most of the earth’s weather occurs in the:

  1. atmosphere
  2. ozone layer
  3. ionosphere
  4. stratosphere
  5. troposphere

The number of growing degree days accumulated in one day for corn (base temperature 50 degrees F, critical maximum 86 degrees F) given a low and high temperature of 45 degrees F and 70 degrees F is:

  1. 60
  2. 18
  3. 30
  4. 15
    5.
  5. 10

 

Soils

Topography is used to describe the:

  1. internal drainage of the soil
  2. depth of the soil
  3. predominate vegetation type on the soil
  4. permeability of the soil to water
  5. slope characteristics of the soil

The type of soil produced from wind-transported parent material is:

  1. residual
  2. alluvial
  3. lacustrine
  4. loess
    5.
  5. colluvial

 

Soil Water

The form of water most available to plants is:

  1. ground water
  2. hygroscopic water
  3. capillary water
    4.
  4. gravitational water
  5. atmospheric water

Which irrigation system would be most effective in minimizing soil moisture loss through evaporation?

  1. trickle irrigation
    2.
  2. gravity irrigation
  3. center pivot irrigation
  4. travelling gun irrigation
  5. solid set pipe irrigation

 

Tillage and Seeding

In comparing conservation tillage and conventional tillage in Iowa, conservation tilllage results in:

  1. cooler soil in May
    2.
  2. more soil erosion
  3. more wind erosion
  4. much greater corn yields
  5. greater tillage costs

To obtain optimum oat yields, you need to have 30 oat plants per square foot. Assuming That all seeds germinate into plants, how many bushels per acre of seed would need to be planted in order to obtain the optimum yield? (There are 14,000 seeds/pound, 32 pounds/bushel, and 43,560 square feet/acre)

  1. 2.0
  2. 2.9
    3.
  3. 3.6
  4. 4.0
  5. 5.2

 

Plant Breeding

Inbreeding in self-pollinated and criss-pollinated species leads to:

  1. heterosis
  2. homozygosity
    3.
  3. allelism
  4. increased productivity
  5. sterility

A green homozygous soybean plant (YY) is crossed with a soybean plant that has green leaves and is heterozygous for green and yellow leaf color (Yy). Green is dominant. The resulting F1 progeny would be:

  1. all yellow
  2. ½ yellow; ½ green
  3. ¾ green; ¼ yellow
  4. ¾ yellow; ¼ green
  5. all green

 

Seed and Grain Quality

The number of normal seedlings that will emerge in a field relates to:

  1. viability and purity of the seed
  2. grain yield harvested the previous season
  3. number of seeds planted per unit area
  4. a and c
    5.
  5. all of the above

The market grade for a sample of oats is indicated as No. 1 for test weight, No. 3 for heat damaged kernels, and No. 4 for foreign material. The overall market grade would be:

  1. No. 1
  2. No. 2
  3. No. 3
  4. No. 4
    5.
  5. Sample Grade

 

Weeds

Which of the following would be considered a weed?

  1. corn in a soybean field
  2. bermudagrass in a cotton field
  3. giant foxtail in a corn field
  4. smooth bromegrass in an alfalfa seed production field
  5. all of the above would be considered weeds

A chemical that is broadcast sprayed on a soybean field kills common cocklebur but doesn’t affect the soybeans. This is an example of a ______________ herbicide.

  1. contact
  2. translocated
  3. selective
    4.
  4. nonselective
  5. preemergence

 

Insects

Using crop rotations, instead of planting the same crop year after year is an example of which type of insect control?

  1. chemical
  2. rotational
  3. psychological
  4. cultural
    5.
  5. physiological

A corn producer should not worry about the following insect damaging his or her crop.

  1. aphids
  2. Hessian flies
    3.
  3. wireworms
  4. seedcorn maggots
  5. black cutworm

 

Diseases

An example of an abiotic disease is:

  1. herbicide damage
    2.
  2. bacterial pustule
  3. stem rust
  4. brown stem rot
  5. purple stain

Ergot on rye results in:

  1. reduced photosynthetic efficiency of the leaves
  2. production of a toxic substance
    3.
  3. loss of root tissue
  4. early death of the plant
  5. germination of the infected seeds

 

Harvest and Storage

Which of the following is probably most important to a farmer in determining when to harvest a forage?

  1. color
  2. yield and quality
    3.
  3. leafiness
  4. digestibility
  5. protein content

Less grain spoilage occurs in air tight storage structures because:

  1. less photosynthesis takes place due to the absence of light
  2. rain can’t get into the storage structure
  3. hot air can’t get into the storage structure
  4. oxygen is depleted and respiration is inhibited
    5.
  5. none of the above

 

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