There is nothing in that link linking them to Elon Musk, and they are transparent about their funding from Bill Gates https://global-change-data-lab.org/. Just because they have a neoliberal slant does not make their work worthless.

Besides, they clearly cite the study that the chart is based on https://acsess.onlinelibrary.wiley.com/doi/abs/10.2134/agronj2005.0001

Edit: Missed the link to the musk foundation, one moment.

Edit 2: They claim

Our World in Data lists various “sponsors” that have made contributions to support the project. These “sponsors” include the Musk Foundation, the Pritzker Innovation Fund, and the Camp Foundation. OWID also notes that it is funded by “more than 4,000 people” who have donated directly via the website.

They do not list any sponsors on the page linked.

I could not find anything on https://www.influencewatch.org/non-profit/musk-foundation/ about them.

All I could find is

Global Change Data Lab is supported by donations from several thousand readers of the web publication Our World in Data, as well as grants from the Quadrature Climate Foundation and the Bill and Melinda Gates Foundation. In the past we have also received support from the World Health Organization, the Department of Health and Social Care in the United Kingdom, and many other generous individuals and organizations that have made contributions to our work.

You find our accounts and a full description of how we are funded in our Annual Report; and you can read the list of donors and supporters on Our World in Data’s Funding Page.

https://global-change-data-lab.org/