3.3 How plant nutrients can be provided and maintained

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  • Created by: acouch1
  • Created on: 16-03-17 21:26
Name 5 organic fertilisers
seaweed, bone meal, fish blood and bone, nettle feeds, poultry manure pellets
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Name 5 inorganic fertilisers
Growmore, Miracle-Gro, Tomorite, Sulphate of Ammonia, Sulphate of Potash
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What are fertilisers?
‘Fertilisers’ are concentrated sources of plant nutrients, usually in compact form such as pellets, granules, powders or liquids. They are used to improve plant growth and yields.
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What is an organic fertiliser?
Organic fertilisers are derived from material which was once living
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What is an inorganic fertiliser?
Inorganic fertilisers are manufactured or derived from minerals
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Are organic or inorganic fertilisers more precise in their nutrient content?
Inorganic
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Are organic or inorganic fertilisers quicker acting?
Inorganic
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What is a 'straight' fertiliser?
A fertiliser that contains one nutrient
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What is a 'compound' fertiliser?
A fertiliser that contains more than one nutrient
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What form can fertilisers take?
Powder to be used directly on the soil, or in a solution, or as granules
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What is a controlled release fertiliser?
A fertiliser that releases nutrients over a period of time
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Why are controlled release fertilisers useful?
Useful for nutrients that are easily leached from the soil, such as nitrogen
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Name 4 methods of fertiliser application
Base dressing, top dressing, liquid, foliar feed
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What is base dressing?
The fertiliser is incorporated in the soil before planting. Domestically dug in.
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What is top dressing?
Fertiliser applied to surface of the soil of exisitng planting. Relies on rain or irrigation to carry it down to the roots, so the fertilser must be soluble
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What is a liquid fertiliser?
The fertiliser is dissolved in water and applied to the soil surface. Works faster than top dressing
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What is a foliar feed?
The fertiliser is dissolved in water and applied as a spray to the leaves of the plant
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Why would you use a foliar feed?
Foliar feeds are quick acting and useful where the soil conditions prevent the uptake of some nutrients
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State 3 environmental benefits of using an organic nutrient source
Recycles food production waste. Soil salinity is lower after use. Encourages beneficial soil organisms.
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State 3 environmental limitations of using an inorganic nutrient source
High consumption of fossil fuels, releasing CO2. Increases soil salinity with regular use. 'Straights' are easy to over apply.
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State a health & safety limitation of using an organic nutrient
may attract vermin
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State an environmental benefit of using an inorganic mutrient
Water soluble, so soil temperature not crucial
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State a timing of application limitation of using an organic nutrient
Requires microbial activity
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State a timing of application benefit of using an organic nutrient
Slow release so less risk of leaching
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State a timing of application limitation of using an inorganic nutrient
Will leach readily if applied at the wrong time or in excess
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State a variability of the material limitation of using an organic nutrient
Low concentrations of nutrients per volume
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State a variability of the material limitation of using an organic nutrient
Powder (meal) less easy to spread evenly
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State a variability of the material benefit of using an inorganic nutrient
Easy to get exactly what is required
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State a variability of the material benefit of using an inorganic nutrient
Very concentrated so less needed
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State a variability of the material benefit of using an inorganic nutrient
cheap
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Card 2

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Name 5 inorganic fertilisers

Back

Growmore, Miracle-Gro, Tomorite, Sulphate of Ammonia, Sulphate of Potash

Card 3

Front

What are fertilisers?

Back

Preview of the front of card 3

Card 4

Front

What is an organic fertiliser?

Back

Preview of the front of card 4

Card 5

Front

What is an inorganic fertiliser?

Back

Preview of the front of card 5
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