Critical issues

One page per issue, each with its own comment thread. Every page shows the current package value, the value with the proposed fix, and the IPCC reference, and links to the test, the proposed change and a script that reproduces the numbers.

1. Feed intake: net energy treated as metabolisable energy
2. N excretion: N retention used with the wrong units
3. Soil carbon: a permanent loss on land that hasn't changed
4. Residue burning: about 24× too high
5. Tree carbon never reaches soil carbon
6. Feeds silently get 0 ha
7. N leaching isn't multiplied by area
8. Missing inputs taken from the caller
9. The shipped example doesn't run

The full demo with the iCLEANED study impact is 08 demo.