The database holds data from 138 annual experiments undertaken at 17 long term trial sites. From these experiments, 110 nutrient rate v yield and 179 soil test value v yield model based relative yields (5 N, 235 P, 49 K and 0 S) have been extracted. Relative yields from the two data models can be independently assessed or blended to do soil test calibrations. It should be noted that the soil test v yield model can generate many relative yields at the one site and it is for this and other reasons that these data have been quarantined from the nutrient rate v yield data accessed under the Annual trials tab. The Annual trial nutrient rate v yield data associted with the Long Term trial data under the Long Term trial tab are from Long Term trial sites only.
Searching the database
Trial sites are plotted on the map as numbered black dots. Make a selection of trials based on the search criteria below and/or by drawing a polygon on the map around your region of interest. Always begin with a broad selection, then narrow the criteria to search the selection in more detail.
