Apex long term simulations: Zero yield and Biomass after a few years of simulation

[Rene Francis Simbi Mvuyekure]

Hello everyone,

I have a question regarding apex long term simulations. I am running simulations (over 20 years) involving cotton under no till management, but for some reason, both cotton yield and biomass are almost zero after 3-4 years of simulation. I have tried all I know about the model but I can't quite figure it out. Has anyone ever faced the same issue, and if so how did you resolve it. Any suggestions will be very much appreciated. I have attached my .opcand .Acy files in case these are needed.

Thank you,

Francis