Environment stressors and plant growth
1. Plant your investigation:
- Plant species to study: dwarf beans
- Environmental factor: pH scale (from pH 4 to pH 10)
Acidic, neutral and alkaline pH will affect the growth of plant in different ways.
We predict that increased acidity of pH will negatively affect the growth patterns of our plants.
Bean will tend to grow (in cm) longer in alkaline conditions compared to acidic condition or beans will grow stronger in neutral ph 7 and alkaline pH but not with acidic pH.
2. Develop your investigation:
Label all 7 pots with the number of pH given to each pot.
For example: I am going to give pH 4 to pot number 1 to carry out the investigation, I label pot 1 with pH 4. Continue the same for the rest of 6 pots remain.
Use paper towels to fill all 7 pots, I use this for water to drain out so the bean will not be in the stage of waterlogged and can’t grow, also it can stop the soil spill out to the floor and make the bean don’t have enough soil and nutrition to grow.
⇨ Help the bean to grow in better conditions.
Fill all 7 pots with soil up to 5 cm of the pot.
Take out 35 beans in total and use 5 beans in each pot. The position of the bean is 1 bean in each corner of the pot and the last bean is in the middle of the pot. Do the same for the rest; push the seed firm down to the soil.
Add more soil to cover the seeds totally but just thin cover about 1 cm of the pot.
Water lightly all 7 pots and leave under the sun.
Check the temperature of the surrounding temperature; best results are achieved when soil temperature is consistently above 20 degree Celsius.
Observation will be taken 2 days after the sowing, water the plant everyday with pH given, specifically at 10:00 am and 5:00 pm.
Measure the height of the beans each 3 days and record into the data. Do the same fore 5 beans in each...