Ok, tried something different this year with overseeding due to the high cost of inputs. Went both directions (up and back in the same track) to address start issues and micro topo issues with a notill drill. Seeded at 5# per pass, so 10# total. Used barenburgs fescue. We had good moisture at plant and a few warm days then cold, been unusually cold here this spring. Slow coming up. I decided to do a theoretical exercise in what 5 #/ac means. Fescue is generally reported at about a quarter of a million seeds per pound, the drill has 7 inch spacing. Column on the right is sq inches times 7 to move all the areal seeds to a linear figure. I don't remember the germ rated on the bags but that is a lab best case germ rate then you have to reduce by some unknown factor for the fact you are using a no till drill. Here are my calcs, It looks to me like if I mostly seed a new seedling every 1-2 inches per drill track, I have done about as well as could be expected. anything way off in the calcs? Thanks.
seeds per # | #/ac | sq inches per ac | seeds per sq in | seeds per inch* 7 | ||||||
250000 | 5 | 1250000 | 6272640 | 0.2 | 1 | |||||
250000 | 10 | 2500000 | 6272640 | 0.4 | 3 | |||||
250000 | 15 | 3750000 | 6272640 | 0.6 | 4 | |||||
250000 | 20 | 5000000 | 6272640 | 0.8 | 6 | |||||
250000 | 25 | 6250000 | 6272640 | 1.0 | 7 |