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128 Cards in this Set
- Front
- Back
Four Main Industries |
1. Fresh produce 2. Processed 3. Forcing (Greenhouse) Industry 4. Niche Markets |
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Top two Global trends |
Apples from EU-27 and China Grapes from Chile and US |
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Top 3 most commonly consumed vegetables |
potatoes, potatoes, onions |
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Top 2 most commonly consumed fruits |
Apples and bananas |
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Reasons consumers are choosing new products |
Taste (in store samples, restaurant), recommendations from friends, price |
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Advantages of buying local |
supporting local growers, local was better quality, thoughts of it being healthier (never proven) |
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Concerns with buying local |
???? |
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Wisconsin's top crops |
Snap beans (processing), cranberries, carrots (processing) |
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Classification groupings |
botanical relationships, edible plant part, life cycle, family grouping/use, sensitivity to environmental factors: nutrient levels, soil moisture, and chilling damage |
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Botanical |
based on botanical hierarchy: kingdom, division/phylum, class, order, family, genus, species, and cultivars Relationships have production importance |
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Botanical example |
Brassica oleracea (wild cabbage) created several different food plants from this single species |
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Botanical Variety |
Subdivisions of a natural species which display rather marked differences |
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Cultivars |
species with mutations caused by human intervention |
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Cultivar examples |
beans, broccoli, carrots, etc. |
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Earliest classifications |
poisonous or non-poisonous |
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Usage classification (6) with examples |
Spices-cinnamon sugar-sugar cane, sugar beet oils-sunflower fibers-flax vegetable-edible portion-cabbage leaves ornamental |
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Edible Plant Part classification examples |
grouping according to the edible plant part roots-carrots stems-above-asparagus, below-Irish potato petioles-celery Leaves-leaf base-onions Immature flower buds-cauliflower Fruits-immature-peas, mature-pumpkin |
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Classification of life cycle and examples |
annual-seed to seed in 1 growing season biennial-seed to seed in about 2 growing seasons (most grown as annuals) perennial-multiple years, continuous seeding |
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Classification of temperature |
climate suited for optimal growth; 2 categories warm-season and cold-season |
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Warm-season |
adapted to temps. between 65-85 degrees, intolerant to frost, cucumber |
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Cool-season |
adapted to temps. between 60-65 degrees, tolerant of light frost, but susceptible to bolting, harvested parts stored at cool temps, artichoke |
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Other temperature classifications |
tropical plants (warm year-round, no frost), subtropical plants (slightly more hardy and can tolerate light frost but not heavy freezes), hardy plants (can tolerate frozen periods of various durations and temps) |
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Wisconsin Hardiness |
5b (-10 to -15) to 3b (-30 to -35) |
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Fleshy fruits |
tissue surrounding the seed is soft |
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dry |
tissue surrounding the seed is hard |
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Fleshy formed from a single flower |
berry, drupe, pome, hesperidium |
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Fleshy formed from multiple flowers |
sorosis (mulberry), syconium (fig), coenocarpium (pineapple) |
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Berry |
a single fleshy fruit usually containing a number of seeds |
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Drupe |
A single fleshy fruit with a hard stone which contains a single seed |
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Drupe Aggregation |
made up of many drupes formed from a single flower, each drupe contains one seed |
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Accessory |
fleshy receptacle, seeds are achenes on the outside |
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Pome |
A thin-skinned fleshy fruit formed by flower parts surrounding the ovary |
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Hesperidium |
A berry with a tough, aromatic rind |
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Pepo |
Contains a leathery skin formed from an inferior ovary |
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Key factors to finding a farm site (11) |
Market potential and demographics of area, soil quality and topography, availability and quality of irrigation water, climate, existing structures and equipment, traffic patterns and roadways, local competition, local labor, prior stewardship of land, zoning regulations, property taxes |
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Ideal soil quality |
deep well-drained soils, loam to sandy-loam texture, high in organic matter (3-5% or more), soil pH between 5.5-7.5, rock/stone free |
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Soil for early veg |
sandy to sandy loam soils, well aerated, good drainage |
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Soil for yield |
silt loam-clay loam, high C.E.C. and fertility, will produce more mid to late season crops |
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Soil to avoid |
heavy clay type soils, especially for root crops |
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Soil/Field prep |
ensures uniform crops and optimal production, depends on location and climate |
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Objectives of soil/field prep |
deal with coverage of existing vegetation, provide for good soil aeration, establish close contact between soil and seed, achieve effective weed control |
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Orchard selection |
ideal site is on a rolling or elevated land so that cold air can drain during spring frosts |
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site A |
warm location-receives more sun. Not affected by late spring frosts and limited wind |
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site B |
Misses late spring frosts, but the top may be too cold in winter because of exposure |
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Site C |
Limited wind, a little colder than A, warming up late in the spring |
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Site D |
Most susceptible to spring frosts |
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Site E |
Can still be frosty, but the woods act as a windbreak, sheltering this site from prevailing winds |
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Site F |
not desirable because of the dense woods at the base of the hill. Woods trap cold air |
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Site G |
Similar to B as in misses late spring frosts, but the top may be too cold in winter because of exposure |
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Orchard slope exposure |
affects fruit trees as they come out of dormancy |
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Southern-facing slope |
warms up faster in spring |
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Northern-facing slope |
warms up slower in spring |
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Eastern-facing slope |
intermediate |
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Western-facing slope |
tends to be windier |
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Purpose of tillage |
prepare a suitable seedbed, reduce weed competition, improve soil physical conditions, incorporate manures, fertilizers, or other amendments, reduces insects and diseases |
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Factors affecting tillage |
crop type, soil type, slope of land, rainfall amounts |
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Primary tillage and example |
initial soil loosening that eliminates and incorporates surface vegetation and deepens root zone, Moldboard plow |
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Secondary tillage and example |
performed on pre-loosened soil where individual clods must be further reduced to smaller aggregates, Floats |
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Pros of tillage |
ability to penetrate soil and handle crop residues |
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Cons of tillage (Conservation tillage) |
disturb the soil as little as possible, conserve soil structure, leave maximum residues on soil |
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Different crops that work with tillage |
*** |
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Macronutrients |
N, P, K, Ca, Mg, S |
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Micronutrients |
B, Cu, Fe, Mn, Mo, Zn, Cl |
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Importance of plant nutrition |
unbalanced nutrient content of soils, environmental impacts and accountability |
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Soil pH |
soil pH is important in nutrient uptake, best is 6.0-7.0 |
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Liming materials and pH |
used to raise pH |
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Sulfur and acids |
used to lower soil pH |
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Element mobility in plants |
Elements that do not move around in plants are immobile and deficiency symptoms appear on younger leaves first. Elements that move around in plants are mobile and deficiency symptoms will appear on older leaves first. |
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Nitrogen |
most widely distributed element, most applied fertilizer element as Ammonium which greens and nitrate grows, constituent of the chlorophyll molecule, part of amino acids and enzymes, part of nucleic acids, nucleotides, purine bases, and alkaloids, involved in synthesis and translocation of phytohormones, sufficiency range in plant tissue is 1.0 to 6.0% |
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Nitrogen Deficiency |
photosynthesis is inhibited, MOBILE, plant appears weak and stunted, small leaves with light green to yellow color, uniform yellowing, older leaves may fall prematurely |
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Phosphorus |
phosphoric acid buffers cellular pH changes, component of enzymes and proteins, component of ATP RNA and DNA, sufficiency range is .2-.5% |
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Phosphorus deficiency |
MOBILE, deficiency when P falls below .2%, causes enhanced anthocyanin production, slows growth of roots and shoots-stunting, dark green leaf coloration, red or purple color on lower leaves |
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Potassium |
Essential in maintaining water status, involved in cellulose synthesis, sufficiency range 1.5-4% |
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Potassium deficiency |
MOBILE, lack of stomatal control causes water loss, reduced lignification causes lodging, plants easily lodge or fall over, light green to yellow color around edges of older leaves, leaves appear to be burned around edges, wilting leaves due to loss of water |
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Calcium |
cell and plant structure, involved in cell elongation and division, regulates cellular anion levels, removal of Ca causes leaf abscisioin and ripening, enhances pollen tube growth and germination, sufficiency range 0.5-1.5% |
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Calcium deficiency |
IMMOBILE, cell expansion and division is terminated at the growing points, classic examples are blossom-end rot and bitter pit, growing points of leaves and roots turn brown and die, leaves chlorotic and deformed, margins become necrotic, fruit/flower quality is reduced |
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Magnesium |
found in center of chlorophyll molecule, activates enzymes need for PS, RS, and DNA and RNA synthesis, sufficiency range .15-.4% |
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Magnesium deficiency |
MOBILE, chlorophyll formation is reduced, Mg uptake declines rapidly with soil pH<5.5, yellowing and interveinal chlorosis of older leaves, margins of younger leaves become necrotic |
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Sulfur |
component of isothiocyanates (characteristic of odor and flavor like onions), Acetyl CoA, amino acids: cysteine and methionine, sufficiency range .15-.5% |
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Sulfur deficiency |
IMMOBILE, protein synthesis is reduced, reductions in chloroplast formations, growth-significantly reduced, uniform yellowing of younger leaves, resembles N deficiency, but found on younger leaves first |
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Tree fruit examples |
apple, pear, quince, cherry, apricot, plum, peach |
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No cross pollination |
tart cherry, peach |
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Cross pollination required |
apples, pear, sweet cherry, hybrid plums |
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Beneficial cross pollination |
apricot |
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Pruning |
remove unwanted wood, light management for shade that tree casts on itself |
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When to prune |
dormant season late Feb. to late April |
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Pruning procedure |
remove water sprouts, suckers, broke or damaged branches, weaker of crossing branches, evaluate often |
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Fertilizer requirements |
Don't over-fertilize, increases vegetative growth, do no fertilize late in year, decreases cold hardiness, 1/10th lb. N per year of age, or per inch of trunk diameter, no more than 1lb N/year |
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Direct seed |
establishment of a crop by placing seed into soil |
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direct seed advantages |
very economical, commercial seed is relatively disease-free, planting time is shortened, good for crops that don't transplant well |
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direct seed disadvantages |
seeds can be sensitive to temp and stress, erratic germination, differences in vigor, small or irregular seed is hard to handle, early weed control is difficult |
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Transplanting advantages |
earlier harvests, better growth conditions, more time to prepare soil, head start on weed control, avoid certain insect pests, need for thinning is eliminated, option for second crop |
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Transplanting examples |
beets, broccoli, brussels sprouts, cabbage, cauliflower, chard, lettuce, tomatoes |
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Disadvantages of transplanting |
may injure certain root systems, raising veg transplants requires considerable time, effort, and growing skills |
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Space requirements |
need to know in order for effective growth |
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Temp mgmt |
cooler temps favor disease development, warmer temps result in spindly plants, provide bottom heat for trays/soil during germination, 65-70 degrees, avoid large differences in day and night temps |
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Light requirements |
transplants need 14-16 hrs, low light intensifies produce leggy, spindly plants, most growers start plants indoors |
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water requirements |
dampen growing media before seeding, water freshly seeded trays gently, use hose breaker, water entire flat uniformly, don'ts overwater, |
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Crop rotation |
prevent the build up of soil pathogens, break up insect and disease cycles, control weed problems, improve soil and nutrient characteristics, spread out seasonal labor demands, reduce risk of climate and market fluctuations |
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Seed priming |
any controlled means of providing seeds with enough water to begin the germination process but inhibit radicle emergence |
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seed pelleting |
covering seeds with a material or coating to form a pellet to create uniform size and improve handling during seeding |
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hot water treatment |
involves the use of a heat treatment to destroy seedborne diseases |
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seed inoculation |
mixing seeds with beneficial microorganisms prior to planting |
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Postharvest field |
live products, continues biochemical and physiological processes once detached from plant, best quality exists at moment of harvest, soil type, fertility, temp, frost, rainy weather |
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Postharvest harvesting |
important to harvest at peak quality, harvest at coolest time of day, handle gently |
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Water loss |
critical to storage quality, losses as low as 3-5% can be detrimental, reduces moisture loss includes: raising relative humidity levels, lowering air temps, reducing air movement across product, using protective packaging |
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Carbohydrate conversion |
enzymatic, starch to sugar, bad for potatoes but good for bananas and pears, sugar to starch bad for sweet corn and sweet peas |
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Flavor changes |
enzymatic, onion flavor changes during storage |
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softening |
pectic enzymes soften fruits |
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color changes |
pigment synthesis |
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vitamin changes |
losses of vitamin C |
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Sprouting, rooting, elongation |
chemical sprout inhibitors applied to storage onions and potatoes |
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decay and rot |
conflict between keeping produce fresh and usable vs. its natural decline |
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Produce respiration |
refrigeration controls the crop's respiration rate, respiration=heat as sugars, fats, and proteins in cells of crop are oxidized |
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Precooling methods |
on-farm cooling facilities, grower who can cool and store produce, challenge, especially for small-scale producers |
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Room cooling |
produce is placed in an insulated room equipped with a fridge unit, large containers should be stacked so that cold air moves around and through them to reach the produce, low cost and slow |
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Forced-air cooling |
fans are used in conjunction with room cooling to pull cold air through bins of produce |
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Tunnel cooling |
make a tunnel between stacks of produce and cover it to force air through the tunnel and out the bins |
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hydrocooling |
cooling accomplished by moving cold water around produce with shower system or by immersion, water-better heat-transfer medium than air, hydrocoolers cool produce much faster than forced air coolers |
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package top icing |
packing a product with crushed or flaked ice |
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vacuum-cooling |
cools by causing water to rapidly evaporate from a product, works best for produce with a high surface to volume ratio |
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Chilling injury |
many fruits and vegetables store best at temps just above freezing |
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Chilling injury examples |
basil, cucumbers, eggplant, pumpkins, and summer squash |
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Symptoms of chilling injury |
surface decay, pitting, internal browning, watersoaking, and surface scald |
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Ethylene |
gaseous hormone produced by ripening fruits and vegs |
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Ethylene producers |
apples, avocados, bananas, peaches, plums, prunes, honey dew melons and tomatoes |
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ethylene sensitive |
asparagus, beans, broccoli, cabbage, carrots, cucumbers, eggplant, lettuce, summer squash |
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Dealing with ethylene |
separate storage rooms from ethylene sources such as ripening rooms, ventilating with outside air, eliminating the use of propane equipment in storage areas, using an ethylene scrubber |