Biology, 4d.

Plants need Minerals.

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Minerals Needed for Healthy Growth.

Fertillisers contain minerals such as, nitrates, phosphates, potassium, magnesium compounds, that are needed for growth. 

Nitrates contain nitrogen for making amino acids and prooteins. These are needed for cell growth. 

Phosphates contain phosphorus for making DNA, and cell membranes. These are needed for respiration, and growth. 

Potassium helps the enzymes needed for photosynthesis, and respiration. 

Magnesium compounds makes chlorophyll, which is needed for photo synthesis.

These minerals can be obtained from the soil.  

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Mineral Deficiencies.

Poor plant growth can be caused by lack of 1 or more minerals in the soil. 

Lack of Nitrate. Poor growth and yellow leaves.

Phosphate. Poor root growth and discoloured leaves. 

Potssium. Poor flower and fruit growth and disscoloured leaves. 

Magnesium. Yellow leaves. 

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Active Transport.

Root hairs take in minerals, using active transport. Minerals are usually present in the soil in low concentration.

Active transport can move substances from an area of low concentration to an area of high concentration, against the concentration gradient.

Active transport uses energy from respiration.

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