This film, from Twig World looks at plant nutrition and why nitrates, phosphates, potassium and magnesium are vital for plant health.
The key points in the film are:
•Understanding how plants grow ensures we have food on the table.
•Plants need sunlight and air, water and minerals.
•If minerals are lacking, roots shrivel and leaves discolor.
•Essential minerals include nitrates, phosphates, potassium and magnesium.
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