Boxplot of simulated minimum soil temperatures.

For an explanation, see the "About" tab

Hovering your mouse over a box will show the likelihood of having a frost after 2 leaves.

Boxplot of simulated minimum soil temperatures.

For an explanation, see the "About" tab

Hovering your mouse over a box will show the likelihood of having a frost after 2 leaves.

Data from SILO is used by APSIM to simulate the daily cycle of soil temperature. A 73 year record (1950 : present) is used to estimate the distribution of surface (0-150mm) minimum soil temperature during each spring.

The chance of a frost damaging the crop is estimated by counting the number of times air temperature goes below 0 ^{o}C during the 73 year period. The crop is considered vulnerable after seven leaves have emerged, a duration that varies with average air temperature - colder temperatures lengthen leaf appearance.

The distribution is presented as a box plot, where the 25^{th} and 75^{th} percentiles are marked as a box, and the center mark is the median (50^{th}). The whiskers of each box are the 5^{th} and 95^{th} percentiles.

Contact Daniel Rodriguez (d.rodriguez@uq.edu.au) for further information.