The prevailing theory at the time was that plants grew by eating soil, and van Helmont devised a clever investigation to test this idea. He weighed a willow tree and weighed dry soil. He planted ...

This provides nutrients in the soil that plants can use to grow. For more in-depth information see the background science section below ... if they are well reasoned with evidence from this experiment ...

Plant growth and development largely depend on the combination and concentration of mineral nutrients available in the soil. Plants often ... Trends in Plant Science 10, 22-29 (2005).

These are roots, they grow downwards into the soil ... are needed for plants to grow successfully - such as the right temperature, light conditions and air. At the end two children continue ...

A vast field of tall, skinny trees sways in a light breeze. In the future, poplar trees in a scene like this could be a ...

Starlight Elementary School student Caleb Clays won first place at the 2025 District Science and Engineering Fair with his ...

One Starlight Elementary School student believes farmers should consider using underwear as a way to test soil health based on his research.