I took a class in college on Agriculture it was a fun experience learning about plants and animals etc. 
That's cool. Agriculture is the breeding and cultivation of animals, plants, and fungi for food. It is a heavily-researched field.
I suspect they make alot of money because with out the people who study Agriculture we would be lost.
That is correct. In fact agriculture was the key development for the rise in sedentary human civilization. Farming meant we didn't have to travel for food.
That is why I love and respect farmers a lot they give out the freshest foods and they are why we have low prices in food as well. 
Also the study of agriculture is referred to as agricultural science. It is a big area of study these days as more countries want to get into sustainable farming.
I just wouldn't trust alot of others countries in Agriculture they have all those chemicals and injections I will be very alert if they try and start selling to the US.
Sustainable agriculture
Sustainable agriculture is farming in sustainable ways (meeting society's food and textile needs in the present without compromising the ability of future generations to meet their own needs) based on an understanding of ecosystem services, the study of relationships between organisms and their environment. It is a long-term methodological structure that incorporates profit, environmental stewardship, fairness, health, business and familial aspects on a farm setting. It is defined by 3 integral aspects which are: economic profit, environmental stewardship and social responsibility. Sustainability
Cultivation
Cultivation may refer to:
- The state of having or expressing a good education (bildung), refinement, culture, or high culture
- Gardening
- Agriculture, the cultivation and breeding of animals, plants and fungi
- Fungiculture, the process of producing food, medicine, and other products by the cultivation of mushrooms and other fungi
- Horticulture, the cultivation of plants
- Tillage, the cultivation of soil
- Animal husbandry, the cultivation of livestock
- Microbiological culture, a