In a controlled environment with a constant temperature, regular watering, and sufficient
light, plants can grow freely without the normal environmental threats posed to them in
the wild, such as cold, animals, agriculture additives like fertilizers, and even man
disrupting the plants growth and reproductive cycles(Conner and Zangori, 1998).
experiment I have conducted, I wanted to observe and compare plant species in a
controlled laboratory setting.
I was interested in finding what differences, if any, there
would be in the same species of plant growing in a regular potting soil compared to the
same species of plant growing in the same soil, but with a fertilizer added to it.
species used in this experiment was
Brassica rapa, B. rapa
is ideal for this type of
experiment, as it grows quickly, maturing in about 30 days. This short growing time
makes them easier to experiment with than most other plants (Encarta, 2004).
plants grew, comparisons of plant features such as plant height, width of leaves, and
number of leaves, were observed and recorded in both the control group, without
fertilizer, and the experimental group, with the fertilizer, in an attempt to see if there is in
fact a significant difference in plants grown with fertilizer and without fertilizer
(Purington and Bergelson, 1999).
My null hypothesis states that there will be no
significant difference in plant growth between the control and fertilized groups.