Conversation with HOLOS development team

Meeting with HOLOS team (2pm PST) 
Agriculture and Agri-Food Canada : Agriculture and Agri-Food Canada 

• Roland Kroebel – Researcher, Agriculture and Agri-Food Canada 

• Sarah Pogue - Holos Model Developer, Agriculture and Agri-Food Canada 

• Aaron McPherson – Software Developer, Agriculture and Agri-Food Canada 

Documents from HOLOS available for review: 

• Source code: GitHub - holos-aafc/Holos: Open source version of the core algorithms used by the Holos model  

• Documentation: Methodology & algorithms for version 1.1.x 

LiteFarm 

1. We have estimated, actual harvest, yield data: need C and N content for these. 

2. Fertilizer-product information from soil amendments and other land related tasks. 

Open source:  

• In their new algorithms documentation: requires in-depth review 

• Will have the underlying ghg standards and models being used 

• Documentation will link to supplementary tables with additional variables used/required 

.NET C#: 

H.CORE:  

• code that has one to one mapping to formulas being used. Can be integrated directly into our proof of concept; may have to translate to python 

H.Integration:  

• tests all components in HOLOS.  

• run on IDE, to see flow on inputs into formulas and trace back 

Cross platform: timeline: no to little migration from .NET 

Most of the code from version 4 will directly move to version 5, UI will look different 

Progress on version 5 in a year or more time, requires an internal approval process. 

Integration with other organizations and/or universities: 

Irish prototype, pretty busy: want to come out with a prototype in the coming year 

Universities: help do the measurements required for the model to be based on. Usually collaborate with CS departments  

At the moment, HOLOS does not keep user data: is a desktop application. 

Difficult to get government approval to have web applications and distinguish data throughout different departments of govt. 

Uses NASA Power API to get location-based information, that is the only type of data that is being forwarded from the HOLOS. 

Holos input parameter requirements can be found under the link above: 

Holos/H.Content/Documentation at main · holos-aafc/Holos  

Link to source file of integration test: https://github.com/holos-aafc/Holos/blob/main/H.Integration/Hay%20LCI/HayLCIIntegrationTest.cs   

Please utilize the GitHub discussion board too, we are trying to bootstrap a Holos community here 🙂 holos-aafc Holos · Discussions   

@Sarah will send the algorithms documentation for version 4 in the coming two weeks: reach out via email 

@Aaron is working on getting the github version upto speed with the the documentation: reach out on discord or github forum 

No official log, look at the commit history to H.CORE to see changes to calculations being made. 

Version 5 will be published after looking at quality control, experts on board