





An ideal soil contains equivalent portions of sand, silt, clay, and organic matter. Soils across North Carolina vary in their texture and nutrient content, which makes some soils more productive than others. Sometimes, the nutrients that plants need occur naturally in the soil. Othertimes, they must be added to the soil as lime or fertilizer.
Maybe this is a reason why plants should grow faster in more organic soil such as potting mix because the texture affects how well nutrients and water can be kept in the soil rather than with backyard soil where the texture is not thick enough to absorb all the nutrients and water necessary.
more infoooo on compost soil: (http://www.uvm.edu/vtvegandberry/factsheets/pottingmix.html)
Compost is rarely used by itself as a potting medium. Compost alone does not have the optimal water holding characteristics, and soluble salt levels are often higher than optimal for potting mix. Plus, high quality compost can be relatively expensive so it makes sense to dilute it with other ingredients like peat. Organic potting mixes are typically made with 20% to 50% compost by volume, depending on the type of crop that will be grown in the mix, the container size, and the growing conditions.
This should explain the slower growth of the sunflowers in compost. I always thought that the more nutrients it had, the faster it would grow. That is true in some cases but not in others; just like here where water cannot be held strongly enough. ooooh, nice, I like it when things make sense. (:
Sunflowers - Backyard Soil
Sunflowers - Potting Mix
Sunflowers - Compost soilSo, here is a fairly late experiment, because I wasn't sure if I had to post a method for the second submission, after posting a method in the first.
This method is for my sunflowers. The post under this is the method for the sunflowers.
Aim:
To investigate whether different types of soil affect the growth rate of sunflowers.
Hypothesis:
The soil with the more nutrients will affect the growth and height of the plant that it will grow quicker and taller than the ones without as many nutrients.
Equipment/Materials:
3 containers to hold the experiment in
sharpie and paper for labeling the plants
Water for watering the plants on a regular basis
A packet of sunflower seeds
3 types of soils:
Backyard Soil
Compost Soil
Potting Mix
Method:
1. Buy and collect all the equipment required for this experiment.
2. Add 1/3 a bucket full of compost soil into the bucket.
3. Plant 6 sunflower seeds from the packet within the soil, following the steps on the packet.
4. Water the soil with 25 mL of water so that it's damp.
5. Repeat steps 2-4 for potting mix and backyard soil.
6. Water the each of the plants daily, making sure the soil is always full of moisture.
7. Observe and record the results of the growth of the plant every 7 days.
8. Compare the results when the period of time for the sunflowers to grow finishes.
Okay, so this method is going to be fairly similar to my method I did for my first blog submission. I re-added this method like fairly late because I didn't realise we had to have one for blog submission two. This method is going to be for my peas. I've decided to continue measuring them and nearing the experiment, I might ditch the peas and go for the sunflowers. However, I may not, and end up using both of the plants. Yes, I've changed my mind again. hahaha
So this is for my peas.
Aim:
To examine whether different types of soil affect the growth of peas.
Hypothesis:
The soil with the more nutrients will affect the growth and height of the plant that it will grow quicker and taller than the ones without as many nutrients.
Equipment/Materials:
3 containers to hold the experiment in
sharpie and paper for labeling the plants
Water for watering the plants on a regular basis
A packet of snow pea seeds
3 types of soils:
Backyard Soil
Compost Soil
Potting Mix
Method:
1. Buy and collect all the equipment required for this experiment.
2. Add 1/3 a bucket full of compost soil into the bucket.
3. Plant 6 snow peas seeds from the packet, into the soil.
4. Water the soil with 25 mL of water so that it's damp.
5. Repeat steps 2-4 for potting mix and backyard soil.
6. Water the each of the plants daily, making sure the soil is always full of moisture.
7. Observe and record the results of the growth of the plant every 7 days.
8. Compare the results when the period of time for the snow peas to grow finishes.