Farmers don't optimize per plant but per farm.
That's all you need to optimize agriculture.
And we all know about those that optimize for cost and nutrition but the resulting food tastes awful; I have consumed enough wheatgrass to attest to this.
We will finally be able to build an oracle, and we will use that tool, that collection of life experiences, to optimize our own lives.
Fast food chains optimize for two of them: taste and price, at the expense of nutrition.