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