Introduction
Today many countries are suffering from desertification and the food shortages caused by this. Desertification seems to have a far higher chance of effecting large numbers of people due to its location. Up to one third of the developing world is located in arid areas that is prone to the phenomenon of desertification. We would like to test the impact on plant growth that poor soils may have. At which point is the soil degraded so that plant growth is no longer a viable option?
Aim:
Desertification is a major problem and affects many countries worldwide. Our aim is to find out what percentage of soil and sand grows Mustard seeds the most productively.
Hypothesis
We predict that the more soil in a tub, the more productive the mixture will be when growing mustard plants because soil has a higher nutritional value than sand and when replacing soil with sand it is lowering it’s nutritional value. Although sand gives the plants more aeration the soil will give the plant nutrients which plants need more when they are germinating. The mix of 100% soil and 0% sand would give the highest nutrition and that factor is key when growing plants.
Equipment:
- 6 Ice cream containers (2 Litres)
- 300 seeds of mustard
- 750 mL of sand (sieved)
- Sieve
- 750 mL of dirt
Method:
2. Lay out the ice cream containers on a flat surface in a sunny spot with no shade.
3. Fill ice cream container No.1 with 500 ml of ‘Just’ polymix soil (100% soil).
Fill No.2 400 ml of soil and 100 ml of sand (80% soil 20% sand).
Fill No.3 300 ml of soil and 200 ml of sand (60% soil and 40% sand).
Fill No.4 200 ml of soil and 300 ml of sand (40% soil and 60% sand).
Fill No.5 100 ml of soil and 400 ml of sand (20% soil and 80% sand).
Fill No.6 500 ml of sand (100% sand).
4. Ensure the soil and the sand are not mixed just piled up in the order of sand and soil.
5. Make sure all the containers are labelled.
6. Poke 1 hole 1 cm deep in the exact centre of the ice cream box.
7. Place one seed in the hole then cover with soil.
8. Repeat process 6 except do it every 1 cm away from the other seeds from the centre.
9. Do the process 6 to 8 for the rest of the 5 containers.
10. Pour 150 ml of water into each container at noon(12:00pm) everyday for four weeks and measure the growth at the same time as well.
Rebecca 19





















