This is the handout for my seminars at the Idaho GCSA conference at Pinecrest Golf Course.
In this presentation, I explain how to identify the three numbers necessary to identify the nutrient requirement for turfgrass. First, one needs to know how much the grass will use. This can be estimated based on the amount of nitrogen applied. Second, one must know how much of an element must be kept in the soil as reserve. This is the MLSN guideline for that element. Third, one must know how much of an element is present. This is found by doing a soil test.
Once we have those three numbers, it is a simple matter to find how much is required as fertilizer, taking into account the amount we must keep as reserve in the soil, the amount the grass will use, and the actual amount present. This process ensures the grass is supplied with all the nutrients it will use.
The presentation slides are here:
For more information on this topic, see the Asian Turfgrass Center’s posts tagged fertilizer.
Links mentioned in the presentation:
You can find articles I’ve written about turfgrass management at the ATC Turf Information page. Follow my blog for updates about turfgrass management around the world, and for even more frequent updates, follow me on twitter.