Increasing the concentration of prolines, such as 2-hydroxy-5-oxoproline, in the foliar portions of plants has been shown to cause an increase in carbon dioxide fixation, growth rate, dry weight, nutritional value, nodulation and nitrogen fixation, photosynthetically derived chemical energy, and resistance to insect pests over the same properties for wild type plants. The logic gate structure and the photosensitive gate structure are disposed on a surface of the substrate. The inspection station provides operating power, illuminating light, and first and second polarizers.