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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.

In the picture

  1. The stone irrigation channel at the left edge, where water enters the field.
  2. The wheeled spreader releasing nutrient granules over the crop rows.
  3. The dark soil layer holding the roots that absorb water and nutrients.
  4. 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.

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Environmental Science, Age 15