CONCLUSIONS
RESULTS
SUPPLIES
PROCEDURE
HYPOTHESIS
Measure the mass of the willow and the soil , and water periodically. Five years later , measure the mass of the soil and plant to verify the changes
Willow , plants, soil, pot , water
Plants only get nutrients from the water they absorb through their roots
All the plants growth is due to the water it absorbed and not the soil, as the latter barely changed
The plant shows a great increase in mass and the soil has practically remained the same