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Friday, January 11, 2013
Nitrogen, Phosphorus, Potassium Impotrance
11:28
Gardening Talk, Gardening Tips, Nitrogen, Phosphorus, Plant Health, Plant Nutrients, Potassium
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Plants make most
of their food by photosynthesis. But they
also need mineralsto be healthy. Plants cannot make minerals. They get them
from the soil. Some of the minerals they need include the following:
Nitrates
Nitrates provide nitrogen. Nitrogen helps plants
grow. All living cells contain nitrogen. Nitrogen is also part of chlorophyll, the
pigmentthat traps sunlight. No nitrogen means no photosynthesis. You can tell
if a plant does not have enough nitrogen. It will be small. Its older leaves
will be yellow.
Phosphorus
Phosphorus is important for photosynthesis,
respiration, and growth. It encourages roots to grow well. You can tell if a
plant does not have enough phosphorus. Its roots will be stunted. Its younger
leaves will be purple.
Potassium
Potassium helps chemicals called enzymes to work. Enzymes
are needed in photosynthesis and respiration. Potassium can also protect a
plant from disease. You can tell if a plant does not have enough potassium. Its
leaves will be yellow. They will have dead parts on them.
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