An Investigation To Show The Varying Amounts Of Microbial Decay Caused By The Amounts Of Water Added to Soil
Aim: Our aim is to find the best type of soil for microbial decay.
Apparatus
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* 15 pieces of raw cabbage 4cm2 (three in each pot),
* Five plastic pots,
* Five pots of different types of Soil/Compost,
* Five labels,
* Weighing scale,
* Rulers
* We will put all pots in the same place making the temperature the
same for each pot (room temperature). This will make the test
fair.
Variable
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We have decided that we will have one variable this will be the
variation in the amount of water we give the plant at the start of the
test. We will have the following:
* 1 tub of peat soil,
* 1 tub of sandy soil,
* 1 tub of sterilised soil,
* 1 tub of soil from the environmental area,
* 1 tub with no soil.
It is important to keep all other possible variables constant and the
same through out the whole of the experiment. So I will put all of the
pots in the same place in the same tray. This will make sure if the
temperature in the room varies, all the pots will experience the same
change for the same amount of time.
Method
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I am going to investigate microbial decay by placing three pieces of
cabbage in a pot and filling it with soil. I will make it a fair test
by placing all the pieces of cabbage away from the other pieces. So
they are not making contact with anything else other than soil. I will
also plan a fair test by weighing each piece of cabbage individually
Two members of the group were instructed to visit the laboratory each day of the experiment to water and measure the plants (Handout 1). The measurements that were preformed were to be precise and accurate by the group by organizing a standardized way to measure the plants. The plants were measured from the level of the soil, which was flat throughout all the cups, to the tip of the apical meristems. The leaves were not considered. The watering of the plants took place nearly everyday, except for the times the lab was closed. Respective of cup label, the appropriate drop of solution was added to the plant, at the very tip of the apical meristems.
7.) After you have heated them to the right temperatures, pour the excess water into a dry evaporating dish. ( Be sure not to get any of the substance in your solution. )
Every student in a lab section planted eight seeds, two in each cell in a quad, to make sure that we had at least one plant for each week for 4 weeks. After planting the seeds we put the plants on a water mat tray to make
Snyder, R. (2009). Water In The Greenhouse. Growing Produce. Retrieved on March 20, 2014 from http://www.growingproduce.com/uncategorized/water-in-the-greenhouse/
Our subject plant for this experiment is Helianthus annuus, a common sunflower plant cultivated all over the world for its seeds and seed oil. Helianthus is an annual plant that grows from 1 to 3 meters, depending on conditions. It is for this reason I chose Helianthus as our subject plant. Shorter plants have a less measurable variable. Helianthus plants, with their long straight stems, would have a much easier variable to measure. A total of 24 Helianthus plants, six to each pot, will be used in the treatment. The large number of subject plants is because of genetic variation that might sway my results if I were to use only a single treatment pot.
To make the test fair I will use the same amount of water and the leaf
Do the same with the sugar in the cups labeled sugar and the fertilizer in the cups labeled fertilizer. Do not stir the fertilizer into the soil
To ensure validity, measure abiotic factors including soil temperature, light intensity, soil texture, and soil pH
¨ To be sure in experiment results the best thing is to repeat it at
The differences in all of the solutions was the pH, the lower the pH the hydroxide the solution had but the higher the pH was the closer it was to neutral. The results of our experiment varied from solution to solution, but the closer the pH was to neutral the longer the seedling was.
The effects of temperature on the distribution of organic contaminants between different phases in the subsurface soil was demonstrated by Davis 1997. Calculations were carried out using the data of Heron et al. (1996) for tri-chloro ethane (TCE) at 90°C. The results indicated that raising the temperature to 90°C caused significant increase in the concentration of contaminant in the air phase under both high and low soil organic matter conditions and significantly decreased the amount that is associated with the solids. Only small amounts remain in the liquid phase. The researchers concluded that if the high organic matter content soil is under water saturated conditions, the amount of TCE in the water would approximately double as the temperature increased from 20°C to 90°C, but 82 percent of the TCE would remain adsorbed to the solids. Under low organic matter and water saturated conditions, there would be approximately a 30 percent increase in the amount of TCE in the water phase with an increase in temperature from 20°C to 90°C, leaving approximately 25 percent
The results from this lab show different results than those hypothesized. The results are as follows: the tomato plant watered with 2 mL per day resulted in an average height of 2.8 cm, the plant watered with 4 mL per day
dishes were raised to a uniform height at one end and the broken down grease was
I added ½ tablespoon of baking soda to 4 cups of water. I added a small drop of liquid soap to the water and stirred to mix. I used the end of a straw and cut out 20 circles of spinach leaves. I pulled the plunger completely out of the syringe and put the leaf circles into the syringe. Next I pushed the plunger back in. I used the syringe to suck up the baking soda water until the syringe was about ¼ full of liquid. I placed my finger over the end of the syringe and pulled back on the plunger as far as I could without pulling the plunger out. I repeated this step three times. All the leaf circles sunk to the bottom of the liquid. I placed the spinach into a clear glass with about 2 inches of baking soda solution. I blocked out all light. I set the lamp with a compact florescent light bulb. I placed the glass in front of the lamp. I counted the number of circles that floated after each minute for 20 minutes (positive control). I created a negative control by not placing compact florescent light bulb and not placing the glass in front of the lamp. I counted the number of circles that are floating. I repeated the experiment with fresh circles and used regular water plus soap for all steps instead of baking soda and soa...
Remove the stoppers and add 6 drops of concentrated sulfuric acid to each of the test tubes.