Applied sciences - agriculture

According to Wikipedia, "Agriculture or farming is the practice of cultivating plants and livestock. Agriculture was the key development in the rise of sedentary human civilization, whereby farming of domesticated species created food surpluses that enabled people to live in cities. The major agricultural products can be broadly grouped into foods, fibers, fuels, and raw materials (such as rubber). Food classes include cereals (grains), vegetables, fruits, oils, meat, milk, eggs, and fungi."
Agriculture is about food. Agriculture helps to provide enough food for us to live.
Wikiversity is a Wikimedia Foundation project devoted to learning resources, learning projects, and research for use in all levels, types, and styles of education from pre-school to university, including professional training and informal learning.
There are lots of self-learning contents about agriculture, which you can study by yourself before going into a formal education.
Category:Agriculture - Wikiversity (this category is not finished yet)
There are some interesting topics that you may have a look:
Vertical farming - Wikiversity