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On the small farm, or in the home garden, techniques suitable for the production of food might be quite different from those used in large-scale production systems. The use of machinery, for example, might be impossible or uneconomical, or special small-scale equipment might be needed. The wide variety of crops produced implies that the production schedule will be complex. Chemical treatments designed for one crop are liable to interfere with another. Furthermore, the farmer or gardener often will not have the same depth of experience as the large scale commercial farmer, and in the interest of safety may wish to avoid certain substances or machinery. In addition, small scale production may not be plagued with the problems common to large scale production or the farmers may choose to accept a certain reduction in yield or price or a decrease in attractiveness in order to avoid pesticides.