Create the MAI Graph per compartment

[pcambra]

Plotted MAI vs expect MAI curve

Plotted MAI data comes from the plantation inventory logs.

Expected MAI curve comes from the species of the plantation (standard)

TBD: Where to put the graph, Inventory tab? Summary tab?

[pcambra]

@LeScruf to provide an example and the data reference per species

[pcambra]

MAI = Mean Annual Increment

[pcambra]

NFA to clarify whether we want combined MAI graphs per CFR

[LeScruf]

It would be good to implement this through entering data into a simple table: volume (m3) on the y-axis vs plantation age (yrs) on the x-axis. This can then be compared with the expected MAI curve for the particular site index (which determines the expected performance of the site denoted by a figure representing the number of years to biological maturity for the species / variety planted). The expected MAI (based on the site index) would similarly be entered into a master table as a reference data set. For example, for Eucalyptus GC-12 clones, there might be data entered for MAI curves with site indexes from 12-18 (yrs).

Thus for any given compartment for any given species, it would be possible to plot the emerging MAI progress relative to expected MAI automatically generated by selecting the site index - which would then provide a guide as to how well the compartment was doing - assuming sufficient inventory data was available / being collected.

This is a simpler way of tracking plantation performance as it does need what are quite complex equations to be solved by the system, since these are part of an MS Access database that continues to be used.

As a second phase of development of this work, a second curve and supporting data set functionality of 'discounted net revenue' would be created so as to provide a guide of when the economically optimal point of harvest is relative to continued (and declining) tree growth over time.

Finally, one idea is that for each plantation and indeed for all plantations, compound MAI curves for each spp. / variety could be generated (or perhaps derivative versions) - which provide an overview of the overall performance of the plantations relative to expected performance. Potentially quite neat / useful!

[pcambra]

@LeScruf to work effectively on this, we need data samples.

[pcambra]

The MAI projected curve is specific per plantation/forest.

For every compartment it should be the real vs projected graph.

Final objective would be to aggregate data (TBD)

[ygoex]

This task is on hold for the moment.