Regarding fertilizer I don't think there is panacea due to its dependence on Natural Gas. Also, it doesn't seem to be problematic for India and China as they are open to import oil and fertilizer from Russia.
Looks like US is not just sanctioning Russia, but also sanctioning poor countries, adhering to US, that depends on Russia fertilizers, wheat, cooking oils etc.. Anyway, US don't have any choice, but this also proves reality always foreshadow ethics. I hope countries will focus more on peace, rather than promotion of hawkish ideas.