Crops can blight, animals can get diseases. I don’t know much about hydroponics but I know that bacteria are a concern. What food source is the most reliable, the least likely to produce less food than expected?
To answer your question. When Agriculture was first “discovered” by humans ~20,000 years ago, the most stable production method was diversification. You should have a variety of crops with overlapping growing seasons and overlapping macro nutrients. For even more security, introduce animal husbandry that can graze on your fallow land and if you have enough land make sure to have multiple distinct herds that never interact with each other except for breeding every few years.
Additionally ensure your food production isn’t dependent on a single harvest season, nor a single climate. Have fruits/legumes/etc other lower yield crops that can be substituted in case your primary grains are hit with blight, or some other environmental factor.
Now let’s introduce some technology. Create several fast growing monocultures that allows you to get multiple harvests in a season that can be used for animal feed, storage and supplementing any deficiencies in the primary human food supply.
tl;dr. Make sure you have multiple methods of food production that are all viable at different times of the year. Ensure that the failure of any one or two of them isn’t a problem for overall yearly production, and ensure that they are independent on each other.
Seize people’s grass lawns and tear out 2/3 of roadways and convert the land into community gardens and ponds, grow food where the people are. Probably some form of population control.
Pie in the sky though. We’ll probably just start eating bugs by the container ship load and then go extinct instead
That’s not going to be as much land as you think it is, relative to the food needs of the maybe billion people living in lawn-growing places.
No you’re right, but it would be one of the more difficult things to convince people to do, so in this pie in the sky scenario where people actually give a crap about anything they’d also be doing a lot of other stuff that together would make a larger whole.
Oh yeah, not to say that lawns make sense. It’s just not a silver bullet.
Crops, but not unbelievably large monocrop farms. Diverse, rotated soil in reasonably sized fields, widely distributed. A variety of different crops mitigates blights, and they’re the most efficient food source, in terms for how much food produced based on the inputs (amount of land, water, energy, etc.) and other considerations (land used, greenhouse gas emissions!
Cockroaches. They can survive nuclear events and will eat almost anything. They multiply faster than plants too.
Foraging if done in a low density area. Natural food sources grow in an extremely diverse way and any blight or parasite will only ever effect a portion of edibles around you.
