Charged Particles
A Negatively Charged Particle
Electron
What does NPK stand for?
Nitrogen, Phosphorus and Potassium
Nutrients needed in larger amounts by the plants.
Macronutrients
The length of time a plant is exposed to light.
Light Duration
The two seasons of agriculture plants
Cool and Warm Season
A Positively Charged Particle
Proton
Growing plants without soil
Hydroponics
Nutrients needed in small amounts by the plant
Micronutrients
The amount/type of light a plant is exposed to; depends largely on the angle of the sun, clouds, and the dust in the atmosphere
Light Intensity
Allowing a plant to wilt slightly before watering or by growing them at temperatures 10 degrees below normal.
Hardening Plants
An atom or molecule in which the total number of electrons is not equal to the total number of protons
Ion
Temperature zones in different areas of the U.S.
Hardiness Zones
Without these nutrients a plant cannot complete its lifecycle.
Primary Nutrients
Give examples of what a plant would look like showing light stress. (Too little/too much light)
Too Little: Long and spindly
Too Much: Short and stunted
The Daily Temperature Change
Thermoperiod
An ion with more electrons than protons, giving it a net negative charge
Anion
Used to estimate the growth and development of plants and insects during the growing season
Growing Degree Days
There are usually enough of these nutrients in the soil and they don’t need to be added.
Secondary Nutrients
The color or wavelength of light reaching the plant surface.
Light Quality
13 of these in North America
Based on average annual
minimum temperatures
USDA Hardiness Zones
An ion with fewer electrons than protons, giving it a positive charge.
Cation
The promotion of flowering by cold treatment given to plants or seeds
Vernalization
What is PPM and what does it measure?
Parts per million - PPM - is a way of measuring how much nutrient is in the plant water
The colors of light that have the greatest effect on plant growth.
red and blue
How can Temperature stress effect plant growth?
Plant growth functions and rates, such as absorption of minerals and water, are determined by temperature. Dramatic highs or lows can cause injury or even death.