An agricultural scientist wants to determine the effect of fertilizers on the corn plant growth.she selects a?

Question

fertilizer to treat a soil plot where corn seeds have just sprouted describe an appropriate control she could use determine whether the fertilizer affect growth of the corn plants.explain why it is important to include this control.10points sciences test

Answer 1

we can find out the deficiency of element in soil by soil analysis. If soil contain less N2 then we can see the growth of cron cropby adding N2.

Answer 2

Control allows one a base line for information that does not include the effect of that which is studied, in this case the fertilizer or minerals in the water. All medium for the roots should be the same and should probably be inert or close to it. Water should be pure and tested for mineral concentration. The plant will then have only it's natural reserves to live on during non-light dependent reactions (respiration). Light levels need to be exactly the same, no shading from plants or the surroundings to guarantee that photosynthesis and lighting is duplicated faithfully. Any differences in any aspect will cause invalid results as established with your control.

Answer 3

Choose a uniform plot of land as much as possible so the only difference is your fertilizer treatment. Divide the land into at least six different plots, fertilize three of the plots and as your control use no fertilizer on the other three plots. The plots that you put the fertilizer on should be chosen at random. This will make it possible to run statistics on your data, and determine if any differences that you observe are due to your fertilizer treatments and not to chance alone.