Lesson 3 (

Notes

Lesson 3 (L3) • Question: What minerals do plants need? ◦ Answer: Nitrates, phosphates, potassium, magnesium • Question: What do plants need nitrates for? ◦ Answer: For healthy growth • Question: What do plants need phosphates for? ◦ Answer: For healthy roots • Question: What do plants need potassium for? ◦ Answer: For healthy leaves and flowers • Question: What do plants need magnesium for? ◦ Answer: For making chlorophyll • Question: How do minerals enter plants? ◦ Answer: In soil water, through the roots • Question: What is the effect of not enough minerals? ◦ Answer: Nitrates: poor growth, yellow leaves. Phosphates: poor root growth, purple leaves. Potassium: yellow leaves, dead patches. Magnesium: yellow leaves. • Question: Farmers add chemicals to the soil to replace missing minerals: what are these chemicals called? ◦ Answer: Fertilisers