Practice Test Geeks(CCA) Certified Crop Advisor Practice Test
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Crop Management Flashcards

7 cards from real CCA practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Crop Management flashcards as text

  1. Which tillage practice leaves at least 30% crop residue on the soil surface after planting?

    Answer: Conservation tillage

    Conservation tillage is defined by leaving 30% or more crop residue on the surface to reduce erosion and improve soil health.

  2. A corn field shows interveinal chlorosis on older leaves first. Which nutrient deficiency is most likely?

    Answer: Magnesium

    Magnesium is mobile in the plant, so deficiency symptoms appear on older (lower) leaves first as an interveinal chlorosis.

  3. What is the primary purpose of a cover crop termination window before cash crop planting?

    Answer: Allow residue decomposition and reduce allelopathy risk

    Terminating cover crops 2–4 weeks before planting allows residue to begin decomposing and reduces allelopathic compounds that can inhibit cash crop germination.

  4. Which growth stage is the most critical period for water stress in corn yield determination?

    Answer: VT/R1 (tasseling/silking)

    Water stress during VT/R1 (tasseling and silking) causes the greatest yield loss because pollination and kernel set are directly impaired.

  5. A farmer wants to reduce soybean cyst nematode (SCN) populations. Which practice is most effective long-term?

    Answer: Plant SCN-resistant varieties in rotation with non-host crops

    Rotating SCN-resistant varieties with non-host crops (e.g., corn) is the most sustainable and cost-effective long-term management strategy.

  6. What does the term 'critical period for weed control' refer to in crop production?

    Answer: The crop growth window during which weed competition causes unacceptable yield loss

    The critical period for weed control is the specific crop growth window during which weeds must be removed to prevent economically significant yield loss.

  7. Which factor most directly determines the economic threshold for pest management decisions?

    Answer: Pest population density relative to crop value and control cost

    The economic threshold is the pest density at which the cost of control equals the economic damage prevented, balancing crop value against control costs.