Aimee Stern. I have been working with scientists and engineers on explaining their research and other work to the general public for almost a decade. I've explained the science of many things and how they connect to the real lives of real people.
Sunflower seeds are best sown outdoors directly into the garden. After planting, cover them with a screen, as the birds and animals love to dig the seeds out. You can also start them in a seedbed and transfer them when they are small. If you plant sunflowers indoors, use individual peat pots. Start two to three weeks before the last frost date for your area. Plant one or two seeds per pot, thinning to one before planting outdoors. If you grow them to feed the birds, look for seedlings growing near the base of last year's crop.
Yield calculation. Yield is calculated by multiplying 2,450 by the multipliers from the charts above. For example in a sunflower field with a stand of 21,000 plants per acre, a head size of 7 inches, a medium seed size with good seed count of 91 percent, and no seed in the center one inch, you would do the following.he sunflower yield for oil sunflower can be calculated by the number of plants per acre, the head diameter, the seed size, the number of filled seeds per head, and observing how much of the center of the head is filled. The yield is calculated by multiplying 2,450 by the âmultipliersâ from the charts below.