I put the series of genki level (GL) blog posts together into this 17 page pamphlet.
The pamphlet explains how one can calculate the genki level from the actual N supplied as fertilizer compared to a standard amount of N for any time duration.

The turfgrass genki level is a way to express the degree to which turgrass is being pushed to grow, or restructed from growing, by the supply of nitrogen.

In this series of posts, I’ve showed how one can start with temperatures and go all the way to a standardized comparison of growth in response to nitrogen supply. In this one, I want to emphasize which of these are real, which aren’t real but are useful, and to make an argument that this is a lot easier than it might seem.

The amount of nitrogen (N) supplied over a certain time duration, compared to a standard amount, is what I call the genki level (GL). And the amount of clippings harvested over a certain time duration, compared to a standard amount, is what Jason Haines calls the turfgrass speedo.

In part 2, I showed how the ratio of N applied to standard N gives an indication of how much one is pushing the grass to grow. I call that the genki level (GL).

This is one I’ve been thinking about for a long time, and have discussed with many turf managers, but I don’t think I’ve explained it on the blog yet. So here goes.

I showed in part 1 how one can go from temperature to a temperature-based growth potential to a standard N amount.
By looking at the actual N applied, and comparing that amount to the standard N for any location, one gets what I call the genki level.