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Botany science fair project:
Does the Amount of Fertilizer Given to a Plant Affect Its Growth?

Science Fair Project Information
Title: Does the Amount of Fertilizer Given to a Plant Affect Its Growth?
Subject: Botany
Grade level: Primary School / Kindergarten - Grades K-3
Project Type: Experimental
Cost: Low
Awards: None
Affiliation: Timber Ridge Magnet School Online Science Fair
Link: http://www.collaboratory.nunet.net/timber/scifair/kindto4/8.htm
Short Background

A fertilizer is a chemical that helps plants to grow. It is used to replace the mineral salts taken by plants or removed by rain.

Common fertilizers:

  • Ammonia
  • Manure (Animal waste) which was the first fertilizer.
  • Compost
  • Urea

The important things in fertilizer are:

  • Nitrogen (N)
  • Phosphorus (P)
  • Potash (K)

When fertilizer is for sale, the percentage of N, P, and K in it may be written on the bag or box, like this: 9-23-30. That means 9% N, 23% P, and 30% K.

Leafy plants need lots of N. Flowering plants need lots of P and K.

A soil test can tell how much N, P, and K is needed.

See also: Fertilizer Experiments & Background Information

Source: Wikipedia (All text is available under the terms of the GNU Free Documentation License)

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Last updated: June 2013
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