It refers to the physical features of the land surface, whether it is sloping, flat/level, or hilly/mountainous

Land Topography that is best for vegetable growing. 

Another factor in selecting a  site is being accessible to all forms of transportation, vegetable products are easily transported without much damage.

Another factor in selecting a site on which plants require water, like hydrophytes, mesophytes, and xerophytes.

The condition of the atmosphere regarding its pressure, temperature, moisture, the presence of clouds, and the direction and velocity of the wind at any given moment.

The average condition in a locality about temperature and moisture

Give 1 example of plant that need cool temperature.

Give one example of plants that need extreme temperature.

This affects some vital processes inside the plant-like photosynthesis, respiration, absorption of water and minerals,

This affects the expansion of crop plants mainly by affecting (1) their structural development, (2) their food production, and (3) the time required of certain species of sorts to provide seeds.