Created 23/02/2023
IMPORTANT NOTE: It is highly recommended that you upgrade your APSIM Next Gen version to at least version 2023.2.7164.0 or later.
In this exercise you will observe the growth of a crop over a single season. You will learn a bit more about how to use APSIM to do a ‘what-if’ experiment with fertiliser rates. These skills can not only be used to experiment with sowing fertiliser rates but also variables such as:
Wheat.apsimx
example.
open an example
menu itemWheat
.Module4
.
Dalby.met
is the selected met file under the weather node.1/01/1989 - 31/12/1989
under the Clock
node.
Soil
then Water
.
initial values
column of both NO3
and NH4
to kg/ha
.
SowingRule
management node.SowingFertiliser
parameter Amount of fertiliser to be applied (kg/ha)
to 0
:
Wheat yield time series
graph.
Experiment
node to the Simulations
node at the top of the simulations tree.
Experiment
node will be added to the bottom of the tree, hold ctrl
key and press up arrow
several times until it is directly below the Simulations
node.Factors
node to this experiment.
Factor
node to the Factors
node.
Wheat
simulation to the experiment as a child node.Wheat
simulation node onto the Experiment
node.
Wheat
simulation that is not a child of the experiment node.
Factor
node: [SowingFertiliser].Script.Amount = 0 to 60 step 30
Experiment
node, you can see 3 differing amounts of sowing fertiliser.
Wheat Yield Time Series
graph onto the Experiment
node.
Change the variables to reflect the image below:
Congratulations on completing the 4th module