The classic answer is because it is a third world, undeveloped country.
However, nowadays agriculture is not as important, due to Mexico's ongoing industrialization. During 2017, only 3.9% of Mexico's GDP came from agriculture, while industry and services accounted for 31.6% and 64% of the GDP, respectively. In terms of labor force, 13.4% is employed in agricultural activities, while 24.1% and 61.9% are employed on industrial and services activities.
Agriculture.
It is neither. Mexico's economy is based on the services and commerce sector, which accounts for 69.5% of Mexico's national income and employs 58% of the labor force.
Iowa's economy is based on Agriculture.
Mexico's economy is largely based on Industry.
industrialization
An agriculture economy is based on farming.
The economy of agrarian societies was based on agriculture.
Agriculture
Kenya's developing economy is based on agriculture and tourism.
The economy of the Middle Colonies was not characterized by plantation agriculture. The Southern Colonies had an economy based on plantation agriculture.
Agriculture
The economy of early civilizations was based around agriculture.