Plant Anatomy
This is the part of the plant name that is always capitalized and comes first.
What is the Genus?
This gaseous hormone causes fruit to ripen and leaves to drop.
What is Ethylene?
Hardiness zones are calculated based on the average annual minimum of this.
What is temperature?
This "ideal" soil texture is a mix of 40% sand, 40% silt, and 20% clay.
This is the most energy-efficient greenhouse style because it shares interior walls.
What is Gutter-connected?
These are roots that grow from "unusual" places, like a stem cutting or corn stalks.
What are adventitious roots?
This hormone is responsible for phototropism (bending toward light) and apical dominance.
What is Auxin?
A USDA Hardiness Zone change (e.g., Zone 6 to Zone 7) represents a difference of this many degrees.
What is 10 degrees (Fahrenheit)?
In a 50lb bag of 10-5-5 fertilizer, this is the total number of pounds of Nitrogen.
What is 5 pounds? ($50 \times 0.10$)
This cooling system uses the evaporation of water to pull heat out of the air.
What is a Fan-and-Pad system?
A white potato is technically this type of modified underground stem.
What is a tuber?
This process is the "engine" that pulls water up from the roots to the leaves.
What is transpiration?
This calculation is found by subtracting the night temperature from the day temperature.
What is DIF?
This soil property describes its ability to hold onto nutrients (like a magnet).
What is the Cation Exchange Capacity (CEC)?
In IPM, this is the stage where you regularly check for pests using sticky cards.
What is scouting?
This horizontal, above-ground stem is how strawberries spread.
What is a stolon (or runner)?
This hormone closes stomata during a drought and maintains seed dormancy.
What is Abscisic Acid (ABA)?
This is the measure of light intensity used in horticulture.
What are Footcandles?
Yellowing between the green veins of a leaf is known as this.
What is interveinal chlorosis?
This pruning rule states you should never remove more than this percentage of a plant in a season.
What is 33% (or 1/3)?
While a potato is a tuber (stem), this orange Thanksgiving favorite is technically a Storage Root, distinguished by its lack of nodes, internodes, and lateral buds.
What is a Sweet Potato?
This specific physiological phenomenon occurs when the rate of Respiration exceeds the rate of Photosynthesis, typically due to high night temperatures, leading to a net loss of dry weight and sugar.
What is a Negative Net Assimilation Rate (or Carbon Compensation Point)?
Moving a plant into a warm greenhouse won't always trigger growth because of this specific physiological state, which requires a precise "Chilling Requirement" to be met before the plant's internal "lock" is released.
What is Physiological (or Internal) Dormancy?
Even if a soil is rich in Iron, a plant may display Interveinal Chlorosis on its new leaves if the soil pH is too high (Alkaline), a process known by this "availability" term.
What is Nutrient Fixation (or being "chemically tied up")?
In Integrated Pest Management, this is the specific point where the cost of the pest damage exceeds the cost of the control measure, signaling that it is finally time to apply a chemical intervention.
What is the Economic Injury Level (EIL)?