What a Field Takes In and Sends Out
A cultivated field constantly receives water and nutrients and turns them into plant material. What leaves the field is the harvest, carried away in crates on a cart.
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Age 15: open this week
Browse Age 15In the picture
- The stone irrigation channel at the left edge, where water enters the field.
- The wheeled spreader releasing nutrient granules over the crop rows.
- The dark soil layer holding the roots that absorb water and nutrients.
- The crate of harvested vegetables on the cart leaving the field.
Examples
- A tomato plant on a balcony that is watered and fed, and later gives ripe fruit.
- A school vegetable patch that gets compost in spring and lettuce in summer.
Key takeaways
- Water and nutrients go in; harvested crops come out.
- Every harvest removes nutrients that must be replaced.
Carry on in the app
Three questions on this lesson. It has left the free week, so its quiz is for subscribers.
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