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Container Media > Chemical Properties of Container Media > Flashcards

Chemical Properties of Container Media Flashcards

1
Q

Primary Macronutrients

A

NPK

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2
Q

Secondary Macronutrients

A

Calcium (Ca), Magnesium (Mg), Sulpher (S)

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3
Q

Micronutrients

A

Al, B, Cl, Co, Cu, Fe, Mn, Mo, Ni, Zn

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4
Q

synthetic fertilizer

A

manufacturing produces pollution
can easily kill/damage crop
offer reliable/accurate formulations and control
concentrated (less product-costs less)

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5
Q

natural fertilizer

A

inherently slow release
not formulated consistently or accurately (less control
belky to handle and store

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6
Q

bone meal

A

2-13-0
high in phosphorus and calcium
mycorrhizal fungi beneficial for P intake

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7
Q

blood meal

A

12-0-0
natural source of nitrogen and iron

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8
Q

guano

A

10-3-1
bat/seabird manure
high in nitrogen/phosphorus/micronutrients

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9
Q

compost tea

A

5:1 water to compost
water soluble nutrients

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10
Q

fossilized carbon complex

A

byproduct of coal mining
leonardite
created humic acids

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11
Q

rock phosphate

A

phosphorus
insoluble form
very slow release

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12
Q

feather meal

A

13-0-0
granular

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13
Q

fish meal

A

10-6-2

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14
Q

greensand

A

0-0-3
marine deposits
source of K
very slow release

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15
Q

kelp meal

A

1.2-0.2-2.5
environmentally detrimental

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16
Q

soy meal

A

6.5-1.5-2.4
inhibit seedling germination after top dressing

17
Q

lime

A

calcium carbonate
CaCO3
raises pH and supplies Ca

18
Q

dolomite lime

A

50% calcium carbonate and 40% magnesium carbonate
slow release
raise pH

19
Q

gypsum

A

source of Ca and S w/o affecting pH

20
Q

glacial rock dust

A

mined glacial moraine
micronutrients

21
Q

mined potassium sulphate

A

source of K and S

22
Q

fertibor

A

mined boron
toxic in certain quantities

23
Q

azomite rock dust

A

aluminum silicate clay
source of K

24
Q

black rock phosphate

A

30% rock phosphate
very slow release

25
Q

superphosphate 0-20-0 or triple superphosphate 0-45-0

A

P is more soluble/available
processed phosphate rock

26
Q

stages of plant production

A

seedling
vegetative
early flowering
flushing
hardening

27
Q

typical analysis ratios of fertilizers

A

seedling: 1-2-1
vegetative: 3-1-2
early flowering: 1-3-2
hardening: 1-2-3

28
Q

sources of soluble salts

A

fertilizers
manures
organic matter
composts

29
Q

effects of high soluble salt levels

A

root injury
unconverted salts accumulating in leaf tissue
salts in media make absorb water through osmosis, making it harder for roots to draw up water

30
Q

reason for salt buildup in media

A

poor irrigation
poor nutrition management

31
Q

remediating high salt levels

A

flushing

32
Q

electrical conductivity use

A

to measure fertilizer levels and measure salt accumulation in media

33
Q

typical readings of nutrient solutions

A

ppm N: 50-200ppm
TDS: 200-1000ppm
mS: 0.75-2.5

Container Media (3 decks)

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