How can I know what types of fruits and vegetables will grow best on my land?

Beside to the above advises, my view is to focus on your experience of growing and cultivating fruits and vegetables. Your financial capacity is also dterminant factor to make choice among different alternatives for decision. Or access to agricultural inputs/technologies, market and finance are critical for determining which vegetable or fruit crops to grow.

the best way is to research all the local and indigenous plants. For introducing alien species, look for plants grown elsewhere under similar climatic conditions.

depending upon ur climatic condition and soil texture

at first you have to know the kind of the soil by analysis it ,then according to the environment circumstances you can know the best type of fruits and vegetables

firstly you should analysis your soil of your region , what type of nutrients are found naturally in the soil .
One of the easiest and most natural ways to keep the land and soil healthy is to protect its natural ecosystem.
When the land is abundant with natural wildlife and good pests, it helps keep the soil in balance.
Another way to keep the soil healthy is to manage the water resources efficiently so the land does not flood and making responsible choices about the application of soil additives.

U have to know climatic condition as Temperature, Rainfall, Soil Type, Soil pH.

It depends on the general climate of your region! you can also check with the local office or bureau of agricultural sector in your region.