Horticulture 4/2/15
Thank you in advance for being respectful
and on task today. Please go through the
notes in this PowerPoint together and
teach each other using the utmost respect.
Please stand and teach the class your
specific part of the lesson with passion and
confidence.
DUSTIN
PLANT OF A DAY
MATTHEW & TREVAN
Hardiness
Hardiness
• The USDA classifies plants on their ability to
withstand cold weather (hardy) or not.
– Plant Hardiness Map: shows average minimum
winter temperatures for given areas
(TREVAN - Pass out map and answer questions on
the next slide in your notes)
Hardiness
• How many plant hardiness zones are across
the US?
• Which plant hardiness zone is Mishicot in.
• Why would this map come in handy to
horticulturalist? (3+ reasons)
KIM
Heat Tolerance
Heat Zones
• The American Horticultural Society classifies
plants on their ability to withstand hot
weather.
– Plant Heat Zone Map: shows rating of a summer
heat calculated based on average days above 86
degrees F
(Answer questions on the next slide in your notes
based on map)
Hardiness
• How many plant heat zones are across the US?
• Which plant heat zone is Mishicot in.
• Why would this map come in handy to
horticulturalist? (3+ reasons)
ALEX
WATER VS LAND AVALIBIABLITY
(APPLE)
As Alex Demonstrates.. Answer the
Following Questions in your notes:
• _____% of the earth is water
• _____% of the earth is land
–
–
–
–
–
_____% of the earth is uninhabitable, unarable
_____% of the earth is habitable
_____% of the earth is habitable but unarable
_____% of the earth is habitable arable
_____% of the earth is topsoil
• Why is this demonstration important? (3+ reasons)
Treven R
WATER – SOULTIONS
Define the following in your notes:
• Water is a UNIVERSAL SOLVENT – most things
dissolve in it
• SOULTIONS are a – uniform mixture of two or
more substances
– A SOLVENT is present in the greatest amount
– A SOLUTE is present in a lesser amount
• Hypothesize 3+ places in horticulture we will
use solutions with H2O?
MEGAN
HUMIDITY
DEFINE EACH IN YOUR NOTES:
• HUMIDITY – amount of water vapor in the air as
compared to the amount of water vapor the air
can hold at a certain temperature
• CONDENSATION – change in matter of a
substance to a denser phase
• DEW – water in the form of droplets appearing in
morning or evening due to temperature
• PRECIPITATION – forms of water that fall from the
sky
After defining each…
1. Megan leads a discussion in
partners then as a class of 3+
examples of where we would see
each in horticulture
2. DRAW one example of each in
notes next to definition
AUSTIN
Functions of Water
1. Pass out scratch paper and have
partners brainstorm 3+ functions of
water
2. Lead a discussion of hypotheses
as a class
3. Record 3+ functions from next
slide in your notes.
Water’s Functions – RECORD
• TURGOR (rigidity and shape in plant)
• CELL DIVISION (growth)
• INTERNAL PRESSURE (growth – ex: root
strength)
• PHOTOSYNTHESIS
• RESPIRATION
• TRANSLOCATION ( & dissolving of minerals)
• TEMPERATURE REGULATION
CHRIS & CARTER
EXCESS & LACK OF WATER
1. Pass out scratch paper and have
partners brainstorm 3+ plant
responses to lack/excess of water
2. Lead a discussion of hypotheses
as a class
3. Record 3+ functions from next
slide in your notes.
NICK - LACKING WATER – RECORD
•
•
•
•
Water Stress
Wilting (limp plant tissue)
Leaf Rolling or Color Change
Brittle/Dead Fibrous Roots
CARTER- EXCESS WATER – RECORD
•
•
•
•
Reduced Oxygen Levels
Root Hair Death
Reduced Transpiration and Photosynthesis
Rot
JEREMIAH
Irrigation
Play Video and ensure
video/sound quality
https://www.youtube.com/watc
h?v=24LJSJqpYuY
NICK
IRRIGATION - Question & Answer
JORDAN
LIGHTS
Record In Notes:
• FLUORESCENT Lights: Higher levels of blue
wavelengths
– Can be placed close to plants/seedlings
• INCANDESCENT Lights: Give off red and orange
wavelengths
– Should not be placed too close to plants as they
burn hot!
DISCUSS: What type of lights do we have in our
headhouse?
KYLE J.
Photoperiods of Plants
Record In Notes
• LONG DAY PLANTS – initiate flowering when
the nights are shorter
– ex: barley, red clover, oats, spinach, winter wheat
• SHORT DAY PLANTS – initiate flowering when
the nights are longer
– ex: chrysanthemum, poinsettia, soybean
• DAY NEUTRAL PLANTS - do not appear to
change due to day length
– ex: grapes, peas, tomatoes, corn
KYLE M.
Weeds
Record In Notes….
• Weeds effect on plants…
– Compete for water, nutrients, light, space
– Reduce quality and yield
– Can be poisonous
– Host insects and diseases
– Increase cost
Record in Notes…
• Broadleaf Weeds - dicot plants
–Ex: dandelions, ground ivy, plantain
• Grass Weeds – monocot plants
–Ex: crabgrass, quackgrass