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Fertiliser
There are three main ingredients plants need for growth
There are three main ingredients plants need for growth. They are collectively known as NPK (nitrates, phosphates and potassium). Visiting the Royal Horticultural Society to get the low-down on the many different types of fertilisers available.
This is a programme from the 麻豆社 World Service Archive and was originally broadcast in 2001.
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麻豆社 World Service Archive
This programme was restored as part of the World Service archive project