-         Light is one of the most important environmental factors affecting plant growth. Light intensity is a limiting factor in the growth of the plant. Chemical reactions and physiological reactions are controlled by the intensity of light. Photosynthesis will not take place if the light intensity is not adequate. Too much light in certain plant varieties can also affect growth.

-         The Agriscience student would select plants of the same species and alter the light intensity for those plants.  Any potted plant would be acceptable for conducting this experiment.

-         A light meter should be used to determine the foot-candles of light that is the measure of the intensity or brightness of light. Different light sources or shade fabrics should be used to alter the intensity of the light. All other factors should remain constant.

-         To determine affects of the light on growth factors several observations should be made. Length of internodes, leaf width and length, and quantity of leaves should be considered. Plant quality should also be a consideration. This would include strength of stems, color of the leaves and flowers, and plant survival.

-         Plant growth textbooks

-         Internet

-         Agriculture Research Service