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Why do growers take records?
- 1. Its required by the Gov.'t
- 2. Obtain credit
- 3. aid management in making decisions
- 4. Quality for disaster/ crop insurance or compenasation
- 5. day to day records: cu yrds of medium, grades of plants produced, hours of labor
What kind of things are important to record?
- general info about plants
- propagation information
- results: % take, quality of product, length of time
When choosing a location, what things must be considered?
- Physical: slope/exposure
- water sources/ quality
- labor, parking (convenience)
- Transportation to markets
What is a disadvantage of an established site?
You must make do with what you have. You can't manipulate the system too much.
Waht is an adventage to a new open site?
- You design it from scratch
- function area lay-out
** keep transportation in mind!
What are 3 planning considerations?
Plant related: stock plants, cuttings, treatment and handling of plants
Buildings/ stuctures: storage, ops, employee comfort, propagation, access, machinery, heat/cool
materials: media (mixing), containers, chemicals, access to new materials.
What are two functions of propagation structures?
Modify the environment: light, water (moisture/humidity), temperature, gases (if enclosed)
protect from : pathogens, , pests, wind, cold/heat, heavy weather
Name 5 types of greenhouse covering materials and describe.
Glass: various pane sizes, breakage, high cost, lasts long, heavy
Plastic film: polyethylene, polyvinylchloride, 2-8 cm thick, single and double thickness, longevity a problem
Flexi plastic sheeting: acrylic, polycarbinate, shatter-resistant, filter heat transfer
Fiberglass: less used than any other
Saran netting: woven/knitted, various degrees of light transmission
describe a lean to greenhouse
- usually residential
- light availability an issue
describe an even-span greenhouse
describe an uneven span greenhouse
describe a ridge and furrow greenhouse
same as even span, but one right after the other, share walls
Why are greenhouses white?
to relight light
What are some problems with soil as a propagative medium?
- sanitation (diseases)
What are some sources of disease?
- organic matter
- planting stock
At what height should cuttings be taken from to avoid disease problems?
higher than 18 inches
what are 4 functions of medium?
holding cutting in place
provide moisture for cutting
permits penetration of air to cutting base
holds nutrients (not important if cutting doesn't have roots yet)
What are desirable traits of a propagative medium?
ability of medium to support cutting
Easy sticking of cuttings into medium
adequate aeration and free drainage
- development of fiberous root system
- coarse: brittle roots, less chance for survival
- fine: fiberous roots, more sturdy
retains structure during rooting
What is optimum porosity of rooting medium?
30% air porosity
3 criteria for good drainage.
Well- graded product
product retains structure during rooting
must allow for changes in the environment and plant, can you alter the conditions for better rooting?
What things must be considered when discussing sanitation of rooting medium?
free of weed seed, nemetodes, pests
pasteurizable, can it be fumigated?
low salt content?
What is the key to success in plant propagation?
good water management
What is a optimum c:n ratioand CEC of a propagative medium?
Name and describe 5 types of plant containers used on the market.
seed germination: plug flat
cutting propagation: metal flat, plug units
growing on of seedling, liners, rootstocks
containers for salable plants
Name 6 things to consider when choosing a TYPE of container.
# of times it can be used/reused
Kind of medium(texture , size , aeration, drainage)
Weight of the medium
irrigation system used
use of automated machinery
What are 16 characteristics of a container that should be considered after the choice of container material has be established?
- ease of de-nesting (seperating from eachother)
- merketing decisions
- shipping operations
- consumer requests
- ease of plant removal
- plant growth
- waste disposal
- space usage
what is an elle pot?
medium rolled in paper, like a big cigarette, cut into pot sized pieces
Name the 3 most important factors in plant propagation.
Describe "interations" between factors of propagation.
most common: light and Temp
intensity factors: ie temp, light quantity
controlling one factor effects one or more others
What is a plant's microclimate?
the area immediately around the plant
What is the optimal wavelength of electromagnetic radiation spectrum for growth?
Plants use ___ and ____ light for photosynthesis.
blue and red
plants use ___ and ___ light for photoperiodism
red and far red
photomorpogenesis is responsible for...
normal stem and leaf growth. branching, leaf enlargement
(Red and I Red)