Transcript Slide 1 - SMS-HB09

BY Grant Jongeirus
EFFECTS OF ACIDITY ON THE GROWTH
OF PLANTS
ABSTRACT
The importance of this experiments was to see
how the growth of plants are effected by
amounts of added acidity.
 Hypothesis-If a table spoon of lemon juiced is
added to the soil of plant to increase the acidity
then this plant will grow the most.
Variables

ABSTRACT
Variables
 Dependent –height of plants
 Independent – Amount of acidity in plants
Data Summary
 Out of the three plants the plant that grew the
most had one table spoon of lemon juice added to
it and grew a total of 5.2 centimeters. While the
plant that had two table spoons had grew a total of
3.7 with the control growing 2.9 centimeters
REVIEW OF LITERATURE
pH- The symbol for the logarithm of the reciprocal
of hydrogen ion concentration in gram atoms per
liter used to express the acidity or alkalinity of a
solution on a scale of 0 to 14 where less than 7
represents acidity, 7 neutrality, and more than 7
alkalinity.
 Acidity- The quality or state of being acidic
 Pothos- Any of various tropical climbing vines
belonging to the genera Pothos and Epitremnum,
o the arum family, widely cultivated for its
variegated foliage.

REVIEW OF LITERATURE

It is important to understand what these words
mean to fully understand the experiment. Also
how acidity effects the growth of plants.
QUESTION AND HYPOTHESIS
Question
 How does added acidity in soil affect plant
growth?
Hypothesis
 If a table spoon of lemon juiced is added to the
soil of plant to increase the acidity then this
plant will grow the most.
EXPERIMENTAL DESIGN
Materials
 Materials
 Three of the same type of pre grown plant
 Lemon juice
 Ruler or any tool to measure height of plant in
centimeters
 Measuring cup
 Water
 Table
VARIABLES
Dependent –height of plants
 Independent – Amount of acidity in plants
 Constant- Room temperature, amount of
sunlight, amount of water, amount of soil, place
of growth, and type of plant.
 Control- Plant with no added acidity.

SET UP
Set up Three of the same kind of plants sitting near
the window growing then there is a person
adding a table spoon of lemon juice to one,
leaving the control alone, and adding two table
spoons to the last one. The same person then
measure’s the height of each plant.

PROCEDURE






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Gather three of the same type of plant that are already
grown
Add tea spoon of lemon juice to first pot, none to
control, and two tea spoons to last pot
Have plants grow watering each plant with same
amounts of water.
Measure Height of all plants.
Have plants grow for determined amount of time
Record plant growth in table
Observe plants and any patterns.
Draw conclusions
GRAPH
25
20
Day 1
Day 2
Day 3
Day 4
Day 5
Total Growth
15
10
5
0
Plant 1
Plant 2
Control
DISCUSSION
The final outcome of the experiment was that the
total growth of plant one (two table spoons of
lemon juice) was 3.7 centimeters while the total
growth of plant two was 5.2 centimeters and the
total growth of the control was 2.9 centimeters. My
main problem with this experiment was that the
plants did not absorb all the water they were given
and began to rot. Also the two plants that were
given water at the end of the experiment did not
look nearly as healthy as the contol.
CONCLUSION
Both of the plants with the lemon juice grew
more the control which had nothing added to it
besides water.
 Since the plant with only one table spoon grew
the most I support my hypothesis.

FUTURE STUDIES
If I were to further study this topic I would use
different types of plants and grew them from
seeds.
 Also I would use a different way to add acidity
to them.
 I think it would be interesting to see how they
react to different temperatures.

ACKNOWLEDGEMENTS
I would like to thank my parents Bruce Jongerius
and my mother Kelly Welch for helping me
through out the experiment. Also I would like to
thank Mrs.Richards for her advice.
BIBILIOGRAPHY
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Bibliography
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Lafleur, Benoit, Linda M. Hooper-BA[sup.1]i, E. Paul Mumma, and James P. Geaghan. "Soil fertility and plant growth in soils from pine forests and
plantations: Effect of invasive red imported fire ants Solenopsis invicta (Buren).(Report). ." Pedobiologia - International Journal of Soil Biology. 49.5 (Oct
3, 2005): 415(9). Academic OneFile. Gale. Shawnee Mission Kansas School District. 27 Oct. 2009
<http://find.galegroup.com/ips/start.do?prodId=IPS>.
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Miller, Crow. "Growing potatoes: planning, understanding, timing, and feeding.(The garden). ." Countryside & Small Stock Journal. 91.3 (May-June
2007): 69(1). General OneFile. Gale. Shawnee Mission Kansas School District. 27 Oct. 2009
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Phillips, Leonard. "Understanding soil pH: why it is important, and how to maintain optimum levels. " Arbor Age. 26.6 (June 2006): 12(3). General
OneFile. Gale. Shawnee Mission Kansas School District. 27 Oct. 2009
<http://find.galegroup.com/ips/start.do?prodId=IPS>.
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Wang, N., J.-Y. Li, and R.-K. Xu. "Use of agricultural by-products to study the pH effects in an acid tea garden soil. " Soil Use and Management. 25.2 (June
2009): 128(5). Academic OneFile. Gale. Shawnee Mission Kansas School District. 27 Oct. 2009
<http://find.galegroup.com/ips/start.do?prodId=IPS>.
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Werdin-Pfisterer, Nancy R., Knut Kielland, and Richard D. Boone. "Soil amino acid composition across a boreal forest successional sequence. " Soil
Biology and Biochemistry. 41.6 (June 2009): 1210(11). Academic OneFile. Gale. Shawnee Mission Kansas School District. 27 Oct. 2009