New Intermediate Wheatgrass model

[pjinnes]

As part of a perennial grains modelling research project, supervised by @Keith-Pembleton from USQ, it is planned to develop a new Intermediate Wheat Grass (IWG) (Thinopyrum intermedium) model. IWG is a perennial grain, which can be used for for both grain production and fodder. The model will be based on the wheat model, with the added funtionality of perenniality and rewind (defoliation).

Data for parameterisation and validation to be provided by growth trials being undertaken at Cowra, NSW and Pittsworth, QLD., along with other available research data. The IWG variety modelled will be Kernza, which has been developed by the Land Institute in Kansas.

Other perennial grains being trialled include Mountain Rye and Tall Wheat Grass. A IWG model could facilitate the future development of models for these species, when sufficient data is available.

[hol353]

@APSIMInitiative/reference-panel FYI

[pjinnes]

Looking for some guidance for this model: I originally planned to base it on the wheat model, but how to revert back to an earlier stage after harvest and track the tiller and leaf growth through to the next season? It seems the wheat model has to track the tillering and leaf cohorts from initial stages, and there is no easy way of resetting to say an emergence stage and knowing what tillers and and leaf stages exist there after a harvest. Alternatively if I use a simple leaf model, such as the red clover or forage brassica models do, then I loose the ability to predict grain production details.

[pjinnes]

@HamishBrownPFR I saw there is a Wheat simple leaf #7657 mod and wondering if that is a possibility that I could investigate for the perennial grains model. Is there likely to be a prototype or a version I could look at? regards, Pete