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#Soil mineral nitrogen apsim manual#

(the as keyword creates an alias)Īmmonium Nitrogen, summed over profile, aliased to NH4Total Nitrate Nitrogen, summed over profile, aliased to NO3Total. Even though it doesn’t have any changeable properties it is still necessary when fertiliser is to be applied.

Make sure your simulation contains a Fertiliser component in your paddock.

Module used to apply fertiliser: fertiliser.Īmount of fertiliser to apply: 100.urea_N.

Select Fertilise on a fixed date to edit:ĭon’t add fertiliser if N in top 2 layers exceeds: 1000.

(“Standard toolbox” -> “Management” -> “Manager (common tasks)” )

Drag a Fertilise on fixed date to your Manager component.

Remove the wheat component from the paddock, and all manager rules from the manager folder.

Set the initial surface organic matter to 2000 kg/ha wheat residues.

6 and 4 in the 0-20 and 20-200 layers) and starting NH4 to 5 kg/ha (i.e.

At the Initial nitrogen node, set the starting NO3 to 10 kg/ha (i.e.

Set the Starting water to 50% full, evenly distributed.

( Hint: Highlight your soil and use the Ctrl & up arrow to move a node up the tree) If you like you can also reorder the soil component so it comes straight under the paddock.

Rename the soil to something short like “Silt”. Remove the existing soil after the addition of the new soil. From Soils toolbox, find and drag a “Southern Bangladesh, Bhola district Silt, (Wheat PAWC = 138.5 mm, 1.5m)” soil file (“Soils” –> Bangladesh –> Southern Bangladesh –> Bhola –> “Silt (North Joynags-06 No673)”) onto the field node of the simulation tree.Add a soil to the field node ( North Joynags-06 No673).Set the clock starting date: Ending date:.Choose a weather file for Bhola (c:\Apsim_workshop\met_files\Bhola_t).Save the file as N Fallow.apsim (C:\Apsim_workshop\N fallow.apsim).Change simulation name to Silt Fertilised.Start with a new simulation based on Continuous Wheat.The simulation is on silt soil in the Bhola region in Southern Bangladesh. Firstly we need to set up our weather and soil data. This simulation will introduce us to editing a simple Manager rule and to more advanced features of graphing simulation results. In this exercise you will observe the fate of fertiliser nitrogen in a fallow situation: Urea to ammonium to nitrate and the loss of soil nitrate via denitrification. Scenario: Kingsthorpe Soil Water Evaporation Project.Create your own or Add someone elses toolbox.Construct a factorial simulation in the User Interface.Filter graph data in the User Interface.

#Soil mineral nitrogen apsim manual#

Training Manual (West Africa – English and French).The effect of residue cover on soil water storage.Cropping sequence simulations (rotations).