Proper crop rotation keeps soil full of nutrients, which keeps plants strong and productive. Unfortunately, many amateur farmers make the terrible mistake of not replenishing the soil after harvesting. This chart gives a good idea of what to plant from year to year. Of course, the vegetables that are grown have to be compatible with the location of the garden itself.
Bucket drip kits, a one time cost of $12, allow women to grow vegetables during the dry season using drip irrigation. Drip irrigation, originally developed in Israel, targets precious water to where it needs to go, the roots of the plants. The bucket is available locally and the farmer (remember, she's likely a female) can raise enough for her family, with perhaps some extra to sell. Much less labor - it uses water efficiently. Less to lug, less time spent fetching it, more time gardening.