Science Buddies: "Ask an Expert"

My science fair topic is the effect of different nitrate levels on gerbera daisy height. I have no idea what values I should use to efficiently conduct my experiment. Whenever I google for appropriate levels, all that comes up is nitrate levels with aquariums and water; not soil. Am I totally thinking of the opposite thing? I dont know my values and how to measure them. Any ideas/help?

My science fair topic is the effect of different nitrate levels on gerbera daisy height. I have no idea what values I should use to efficiently conduct my experiment. Whenever I google for appropriate levels, all that comes up is nitrate levels with aquariums and water; not soil. Am I totally thinking of the opposite thing? I dont know my values and how to measure them. Any ideas/help? I HAVE NOT BE APPROVED AND MUST BE BY TOMORROW BEFOER BREAK. I am aware this is not like a chat room but i have been stressed out by this since my teacher said she MUST have it tomorrow morning.

Hi egilbert97,

What did you try googling? All I did was search for "soil nitrate levels" and the first couple results mention soil nitrate levels in parts per million (ppm):

http://www.agry.purdue.edu/ext/corn/new ... ablen.html

http://homeguides.sfgate.com/normal-soi ... 80102.html

-Ben