At first glance the fields don't belong together. What does a crop of hay have to do with software, or a ledger with an orchard?
The common ground
They all reward the same things. Each one goes better with patient preparation, careful maintenance, and a willingness to think in years instead of weeks. Each one punishes shortcuts eventually. And each one compounds: good soil, good code, clean books and well-kept capital all get better the longer they're looked after.
What the name holds
Harrow is the name that ties them together. It stands for doing the groundwork first, so that whatever gets planted, in any field, starts with its best chance.
Tilth will follow the work across all five fields, one entry at a time.