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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

Top two Global trends

Apples from EU-27 and China


Grapes from Chile and US

Top 3 most commonly consumed vegetables

potatoes, potatoes, onions

Top 2 most commonly consumed fruits

Apples and bananas

Reasons consumers are choosing new products

Taste (in store samples, restaurant), recommendations from friends, price

Advantages of buying local

supporting local growers, local was better quality, thoughts of it being healthier (never proven)

Concerns with buying local

????

Wisconsin's top crops

Snap beans (processing), cranberries, carrots (processing)

Classification groupings

botanical relationships, edible plant part, life cycle, family grouping/use, sensitivity to environmental factors: nutrient levels, soil moisture, and chilling damage

Botanical

based on botanical hierarchy: kingdom, division/phylum, class, order, family, genus, species, and cultivars


Relationships have production importance

Botanical example

Brassica oleracea (wild cabbage)


created several different food plants from this single species

Botanical Variety

Subdivisions of a natural species which display rather marked differences

Cultivars

species with mutations caused by human intervention

Cultivar examples

beans, broccoli, carrots, etc.

Earliest classifications

poisonous or non-poisonous

Usage classification (6) with examples

Spices-cinnamon


sugar-sugar cane, sugar beet


oils-sunflower


fibers-flax


vegetable-edible portion-cabbage leaves


ornamental

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

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

Classification of temperature

climate suited for optimal growth; 2 categories warm-season and cold-season

Warm-season

adapted to temps. between 65-85 degrees, intolerant to frost, cucumber

Cool-season

adapted to temps. between 60-65 degrees, tolerant of light frost, but susceptible to bolting, harvested parts stored at cool temps, artichoke

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)

Wisconsin Hardiness

5b (-10 to -15) to 3b (-30 to -35)

Fleshy fruits

tissue surrounding the seed is soft

dry

tissue surrounding the seed is hard

Fleshy formed from a single flower

berry, drupe, pome, hesperidium

Fleshy formed from multiple flowers

sorosis (mulberry), syconium (fig), coenocarpium (pineapple)

Berry

a single fleshy fruit usually containing a number of seeds

Drupe

A single fleshy fruit with a hard stone which contains a single seed

Drupe Aggregation

made up of many drupes formed from a single flower, each drupe contains one seed

Accessory

fleshy receptacle, seeds are achenes on the outside

Pome

A thin-skinned fleshy fruit formed by flower parts surrounding the ovary

Hesperidium

A berry with a tough, aromatic rind

Pepo

Contains a leathery skin formed from an inferior ovary

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

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

Soil for early veg

sandy to sandy loam soils, well aerated, good drainage

Soil for yield

silt loam-clay loam, high C.E.C. and fertility, will produce more mid to late season crops

Soil to avoid

heavy clay type soils, especially for root crops

Soil/Field prep

ensures uniform crops and optimal production, depends on location and climate

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

Orchard selection

ideal site is on a rolling or elevated land so that cold air can drain during spring frosts

site A

site A

warm location-receives more sun. Not affected by late spring frosts and limited wind

site B

site B

Misses late spring frosts, but the top may be too cold in winter because of exposure

Site C

Site C

Limited wind, a little colder than A, warming up late in the spring

Site D

Site D

Most susceptible to spring frosts

Site E

Site E

Can still be frosty, but the woods act as a windbreak, sheltering this site from prevailing winds

Site F

Site F

not desirable because of the dense woods at the base of the hill. Woods trap cold air

Site G

Site G

Similar to B as in misses late spring frosts, but the top may be too cold in winter because of exposure

Orchard slope exposure

affects fruit trees as they come out of dormancy

Southern-facing slope

warms up faster in spring

Northern-facing slope

warms up slower in spring

Eastern-facing slope

intermediate

Western-facing slope

tends to be windier

Purpose of tillage

prepare a suitable seedbed, reduce weed competition, improve soil physical conditions, incorporate manures, fertilizers, or other amendments, reduces insects and diseases

Factors affecting tillage

crop type, soil type, slope of land, rainfall amounts

Primary tillage and example

initial soil loosening that eliminates and incorporates surface vegetation and deepens root zone, Moldboard plow

Secondary tillage and example

performed on pre-loosened soil where individual clods must be further reduced to smaller aggregates, Floats

Pros of tillage

ability to penetrate soil and handle crop residues

Cons of tillage (Conservation tillage)

disturb the soil as little as possible, conserve soil structure, leave maximum residues on soil

Different crops that work with tillage

***

Macronutrients

N, P, K, Ca, Mg, S

Micronutrients

B, Cu, Fe, Mn, Mo, Zn, Cl

Importance of plant nutrition

unbalanced nutrient content of soils, environmental impacts and accountability

Soil pH

soil pH is important in nutrient uptake, best is 6.0-7.0

Liming materials and pH

used to raise pH

Sulfur and acids

used to lower soil pH

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.

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%

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

Phosphorus

phosphoric acid buffers cellular pH changes, component of enzymes and proteins, component of ATP RNA and DNA, sufficiency range is .2-.5%

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

Potassium

Essential in maintaining water status, involved in cellulose synthesis, sufficiency range 1.5-4%

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

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%

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

Magnesium

found in center of chlorophyll molecule, activates enzymes need for PS, RS, and DNA and RNA synthesis, sufficiency range .15-.4%

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

Sulfur

component of isothiocyanates (characteristic of odor and flavor like onions), Acetyl CoA, amino acids: cysteine and methionine, sufficiency range .15-.5%

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

Tree fruit examples

apple, pear, quince, cherry, apricot, plum, peach

No cross pollination

tart cherry, peach

Cross pollination required

apples, pear, sweet cherry, hybrid plums

Beneficial cross pollination

apricot

Pruning

remove unwanted wood, light management for shade that tree casts on itself

When to prune

dormant season late Feb. to late April

Pruning procedure

remove water sprouts, suckers, broke or damaged branches, weaker of crossing branches, evaluate often

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

Direct seed

establishment of a crop by placing seed into soil

direct seed advantages

very economical, commercial seed is relatively disease-free, planting time is shortened, good for crops that don't transplant well

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

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

Transplanting examples

beets, broccoli, brussels sprouts, cabbage, cauliflower, chard, lettuce, tomatoes

Disadvantages of transplanting

may injure certain root systems, raising veg transplants requires considerable time, effort, and growing skills

Space requirements

need to know in order for effective growth

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

Light requirements

transplants need 14-16 hrs, low light intensifies produce leggy, spindly plants, most growers start plants indoors

water requirements

dampen growing media before seeding, water freshly seeded trays gently, use hose breaker, water entire flat uniformly, don'ts overwater,

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

Seed priming

any controlled means of providing seeds with enough water to begin the germination process but inhibit radicle emergence

seed pelleting

covering seeds with a material or coating to form a pellet to create uniform size and improve handling during seeding

hot water treatment

involves the use of a heat treatment to destroy seedborne diseases

seed inoculation

mixing seeds with beneficial microorganisms prior to planting

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

Postharvest harvesting

important to harvest at peak quality, harvest at coolest time of day, handle gently

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

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

Flavor changes

enzymatic, onion flavor changes during storage

softening

pectic enzymes soften fruits

color changes

pigment synthesis

vitamin changes

losses of vitamin C

Sprouting, rooting, elongation

chemical sprout inhibitors applied to storage onions and potatoes

decay and rot

conflict between keeping produce fresh and usable vs. its natural decline

Produce respiration

refrigeration controls the crop's respiration rate, respiration=heat as sugars, fats, and proteins in cells of crop are oxidized

Precooling methods

on-farm cooling facilities, grower who can cool and store produce, challenge, especially for small-scale producers

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

Forced-air cooling

fans are used in conjunction with room cooling to pull cold air through bins of produce

Tunnel cooling

make a tunnel between stacks of produce and cover it to force air through the tunnel and out the bins

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

package top icing

packing a product with crushed or flaked ice

vacuum-cooling

cools by causing water to rapidly evaporate from a product, works best for produce with a high surface to volume ratio

Chilling injury

many fruits and vegetables store best at temps just above freezing

Chilling injury examples

basil, cucumbers, eggplant, pumpkins, and summer squash

Symptoms of chilling injury

surface decay, pitting, internal browning, watersoaking, and surface scald

Ethylene

gaseous hormone produced by ripening fruits and vegs

Ethylene producers

apples, avocados, bananas, peaches, plums, prunes, honey dew melons and tomatoes

ethylene sensitive

asparagus, beans, broccoli, cabbage, carrots, cucumbers, eggplant, lettuce, summer squash

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