When should soils be sampled?

The optimum time of year to sample turfgrass soils depends upon the turf types grown, soil conditions, climate and rainfall pattern. The MLSN guidelines provide a method for evaluating soil nutrient levels and for planning a fertilizer management plan. However, there is no specification in the MLSN guidelines for when soil samples should be collected. This Update will provide guidance for when soil samples should be collected.

The primary factors that influence the seasonality of soil nutrient status are:

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