This document provides guidance on proper post-harvest handling of seed collections to maximize seed viability. It addresses issues like separating immature and mature seeds, assessing seed dryness, and handling based on ambient conditions. The key recommendations are to dry seeds as soon as possible if moisture levels are above 50% equilibrium relative humidity, using methods like spreading in shade or using desiccants. Very immature seeds that are not desiccation tolerant require slow drying under natural conditions to allow further ripening. Proper post-harvest handling is important to avoid losses in viability during collecting trips and ensure high quality seeds arrive at seed banks.
Guidelines for Successful Seed Storage ~ Yoshinaga
`
For more information, Please see websites below:
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Organic Edible Schoolyards & Gardening with Children =
http://scribd.com/doc/239851214 ~
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Double Food Production from your School Garden with Organic Tech =
http://scribd.com/doc/239851079 ~
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Free School Gardening Art Posters =
http://scribd.com/doc/239851159 ~
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Increase Food Production with Companion Planting in your School Garden =
http://scribd.com/doc/239851159 ~
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Healthy Foods Dramatically Improves Student Academic Success =
http://scribd.com/doc/239851348 ~
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City Chickens for your Organic School Garden =
http://scribd.com/doc/239850440 ~
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Simple Square Foot Gardening for Schools - Teacher Guide =
http://scribd.com/doc/239851110 ~
POST-HARVEST MANAGEMENT OF MEDICINAL AND AROMATIC PLANTSSubham Dwivedi
Postharvest Management is the stage of crop production immediately following harvest.
Post-harvest management practices include:
Cleaning the product
Sorting
Packaging
Storage
Transportation & distribution
Cleaning refers to chlorine washing of the banana fruit for the removal of undesirable material including latex, chemicals, adhering soil particles along with the microorganisms carried by the soil.
Sorting in banana would refer to removal of overripe, injured, bruised, rotten, diseased, infected and cut fruits.
Grading in banana fruit would refer to categorization of fruits based on number & size of fingers in each hand.
Complete idea about seed production in brief. Classification of seed. advantage and disadvantage of seed production , marketing channel and quality seed production.
Guidelines for Successful Seed Storage ~ Yoshinaga
`
For more information, Please see websites below:
`
Organic Edible Schoolyards & Gardening with Children =
http://scribd.com/doc/239851214 ~
`
Double Food Production from your School Garden with Organic Tech =
http://scribd.com/doc/239851079 ~
`
Free School Gardening Art Posters =
http://scribd.com/doc/239851159 ~
`
Increase Food Production with Companion Planting in your School Garden =
http://scribd.com/doc/239851159 ~
`
Healthy Foods Dramatically Improves Student Academic Success =
http://scribd.com/doc/239851348 ~
`
City Chickens for your Organic School Garden =
http://scribd.com/doc/239850440 ~
`
Simple Square Foot Gardening for Schools - Teacher Guide =
http://scribd.com/doc/239851110 ~
POST-HARVEST MANAGEMENT OF MEDICINAL AND AROMATIC PLANTSSubham Dwivedi
Postharvest Management is the stage of crop production immediately following harvest.
Post-harvest management practices include:
Cleaning the product
Sorting
Packaging
Storage
Transportation & distribution
Cleaning refers to chlorine washing of the banana fruit for the removal of undesirable material including latex, chemicals, adhering soil particles along with the microorganisms carried by the soil.
Sorting in banana would refer to removal of overripe, injured, bruised, rotten, diseased, infected and cut fruits.
Grading in banana fruit would refer to categorization of fruits based on number & size of fingers in each hand.
Complete idea about seed production in brief. Classification of seed. advantage and disadvantage of seed production , marketing channel and quality seed production.
Home Germination Testing
`
For more information, Please see websites below:
`
Organic Edible Schoolyards & Gardening with Children =
http://scribd.com/doc/239851214 ~
`
Double Food Production from your School Garden with Organic Tech =
http://scribd.com/doc/239851079 ~
`
Free School Gardening Art Posters =
http://scribd.com/doc/239851159 ~
`
Increase Food Production with Companion Planting in your School Garden =
http://scribd.com/doc/239851159 ~
`
Healthy Foods Dramatically Improves Student Academic Success =
http://scribd.com/doc/239851348 ~
`
City Chickens for your Organic School Garden =
http://scribd.com/doc/239850440 ~
`
Simple Square Foot Gardening for Schools - Teacher Guide =
http://scribd.com/doc/239851110 ~
FACTORS AFFECTING QUALITY OF FRESH PRODUCE - Presented By Mustafa Atas
Recently I am working a project called “Factors Affecting Quality of Fresh Produce” and prepared presentation.
FACTORS AFFECTING QUALITY OF FRESH PRODUCE-Presented By Mustafa Atas
Recently I am working a project called “Factors Affecting Quality of Fresh Produce” and prepared presentation.
Oats are a hardy cereal grain able to withstand poor soil conditions in which other crops are unable to thrive. Although oats, or Aveena Sativa to give the Latin name, are more commonly eaten in the form of oatmeal or rolled oats, they also offer a vast array of other uses; from use as an ingredient in baked goods to use as a treatment for skin complaints. Oats have also found fame in recent years as a health food and are widely believed to be able to help combat a whole raft of serious ailments such as heart disease and diabetes.
Seed Saving ~ New York Botanical Garden
`
For more information, Please see websites below:
`
Organic Edible Schoolyards & Gardening with Children =
http://scribd.com/doc/239851214 ~
`
Double Food Production from your School Garden with Organic Tech =
http://scribd.com/doc/239851079 ~
`
Free School Gardening Art Posters =
http://scribd.com/doc/239851159 ~
`
Increase Food Production with Companion Planting in your School Garden =
http://scribd.com/doc/239851159 ~
`
Healthy Foods Dramatically Improves Student Academic Success =
http://scribd.com/doc/239851348 ~
`
City Chickens for your Organic School Garden =
http://scribd.com/doc/239850440 ~
`
Simple Square Foot Gardening for Schools - Teacher Guide =
http://scribd.com/doc/239851110 ~
Minimize seed deterioration during it’s storage of orthodox or recalcitrant s...AKHILRDONGA
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it contains How to minimize the seed deterioration during its storage.
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2. Fleshy fruits
Fleshy fruits are best kept in
aerated plastic bags until they
can be processed. Open the bags
daily to avoid mould and possible
fermentation.
Over-ripe fleshy fruits, or those
that have been damaged or
crushed during collecting may
require partial or full cleaning.
Remove as much flesh as possible
from the fruits, using a sieve and
cool running water.
Leave the seeds to air-dry on
a fine wire mesh or thick filter
paper before packing them into
cloth bags.
Allow the seeds to dry slowly
under ambient conditions for 1-2
weeks before transferring to seed
bank dry-room conditions (15ºC,
15% RH).
Drying with desiccants
Any hygroscopic substance (silica
gel, dried seeds such as rice or
maize, charcoal, etc.) can be used
to remove moisture from seeds,
providing that the eRH of the
desiccant is lower than the eRH
of the seeds. If seeds are very
wet it is better to dry them for 2-
3 days under ambient conditions
before using the desiccant. This
can be done even if the daytime
ambient RH is relatively high (70-
80%).
Once the bulk water has been
removed, transfer the seeds
to a sealed container with the
desiccant, allowing seed moisture
to be reduced to a safe level
(~30% eRH). Use a silica gel:seed
weight ratio of 1:1 To dry seeds
to the same level using charcoal,
use a weight ratio of 1:3.
Change the drying agent
regularly to speed up drying
time. Regenerate desiccants in
the sun during the day and then
use them to maintain seed drying
at night, in sealed containers.
Seed Maturity Stage Seed Moisture Status
Ambient Conditions
(daytime RH < 50%)
“Dry”
(daytime RH > 50%)
“Humid”
Immature 85 - 100% eRH Hold intact fruits under shaded,
ambient conditions for 1-2 weeks*
Natural dispersal
< 50% eRH
“Dry”
Hold in loosely packed
bags in a well ventilated,
shady location. Minimise
moisture absorption at
night.
Transfer to seed bank as
soon as possible
OR
Dry with desiccant
“Wet” room
> 50% eRH
Dry in thin layer, in well
ventilated location.
OR
Place in air-conditioned
Minimise moisture
absorption at night.
* Remove seeds from fleshy fruits as soon as morphological signs (e.g. fruit colour) indicate that they are
fully ripe. Allow to dry slowly under ambient conditions before transferring to a cool dry-room.
• Take note of the prevailing
weather conditions - if it has
recently rained, seeds may be
wetter than expected.
• Observe seed and fruit
morphology - seeds enclosed within
indehiscent fruits may be at a high
moisture level.
• Seeds which have only just
reached the point of natural
dispersal may be at a high moisture
level, even if ambient conditions are
dry and warm.
Depending on seed moisture
status, ambient conditions and
seed maturity, handle collections as
follows:
“Dry” (<50% eRH), fully mature
seeds
Seeds within dehiscent fruits,
collected in dry climatic conditions,
may have already dried down to a
safe level.
If ambient conditions are
favourable:
• Loosely pack dry seeds in
labelled bags and keep in a cool,
well ventilated place.
• Spread bags out so that air
circulates freely and place them in
the shade - under the vehicle may
be a good place – until all other
fieldwork is complete.
• Dry seeds may need to be packed
away at night to mimimise moisture
absorption.
• Similarly, if weather conditions
change (e.g. rainfall) and ambient
RH rises, protect collections from
absorbing moisture.
“Wet” (50-100% eRH), fully
mature seeds
Seeds which have only recently
reached natural dispersal (especially
if they are tightly enclosed within
indehiscent fruits) or seeds collected
during the rainy season will be
within this moisture range.
Wet seeds need to be dried as soon
as possible. If ambient conditions
are suitable (RH < 50%):
• Spread seeds out in a thin layer
on newspaper in partial shade.
• Raise seeds off the ground if
possible to allow air circulation.
• Re-pack seeds at night and place
them within the vehicle to minimise
moisture absorption as ambient RH
rises.
• Make sure that the correct label
remains with the collection during
drying and re-packing.
If ambient conditions are not
suitable for drying, use a desiccant
such as silica gel (see box).
Alternatively, spread collections in
a thin layer in an air-conditioned
room.
If none of these options is feasible,
get the seeds back to the seed bank
as soon as possible, where they can
be dried to safe moisture levels.
Right: Using dried maize to dry a seed
collection in a sealable bucket. Some low-technology
relative humidity indicators have
been added to monitor the moisture level
inside the bucket.
Summary of recommendations for effective post-harvest handling of seeds
Above: Fleshy Solanum fruits collected at full
maturity.
Below: Solanum fruits being cleaned in the
field. The fruits are squashed in a nylon mesh
bag to remove juice and pulp. The seeds will
be further cleaned when they begin to dry.