contain nitrogen for making amino acids and protein for growth and repair, without it plants have poor growth and yellow leaves
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Phosphates
Needed for respiration and growth, contains phosphorus for making DNA and cell membranes. without it plant has poor roots and discolored leaves
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Potassium
Helps the enzymes needed for photosynthesis and respiration, without it plants have poor root and flower growth and discolored leaves
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Magnesium
Needed for making Chlorophyll which is essential for photosynthesis. without it leaves turn yellow
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Thee factors affecting the rate of decay
HEAT - speeds up respiration of microorganisms = faster decay. WATER - microorganisms need water = faster decay. OXYGEN - allows aerobic respiration giving more energy = decay faster
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6 methods for Preserving Food
Canning (keep decomposers out) Cooling (slower production rate) Freezing (No reproduction) Drying (No water) Adding Salt/Sugar (Loose water by osmosis) Adding Vinegar (Acidity kills decomposers)
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Name 5 organic farming methods
Organic Fertilizers (manure recycles organic matter) Crop Rotation (growing different crops each year prevents build up of pests) Weeding (no chemicals) Varying planting times (avoid major pests) Biological Control (living predator)
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Advantages and Disadvantages of organic farming
ADVANTAGES: fewer chemicals, less water pollution, no battery farming. DISADVANTAGES: takes up more space, more labor intensive, more expensive, can't grow as much food
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Other cards in this set
Card 2
Front
Phosphates
Back
Needed for respiration and growth, contains phosphorus for making DNA and cell membranes. without it plant has poor roots and discolored leaves
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