Yea legumes are an essential part of the traditonnal rotation of cultures.

Just remember that it contributes mostly nitrogen

I just thought of this: for potassium and phosphorus, you could add ash. Just be mindful of the effect on pH — it’s alkaline.

In any case, I think that without compost or chemical fertilizers, it will be hard.

Lombricompost would be equivalent to compost if it’s acceptable to your landlord, I think.

I have no idea of the benefits of bokashi.

You might want to rely on plants that require no fertlizing: dill, rosemary, parsnip, and oregano.

The following plants require little fertilizing: carrots, beans (+ they give nitrogen), arugula, cilantro, onions, turnip, shelling pea, flat-podded pea, chamomile

I’m pretty sure it is.

Some have mentionned pee, which is good but unfortunately provides only nitrogen.

Well, I have another good source of nitrogen to suggest: legumes. Grow legumes and they will naturally add nitrogen to your soil, without adding any sodium

Anyway, it’s not composting, so, per the landlords’ rules, it’s fine.

This is good but will only provide nitrogen.