Science

There is a lot of scope in this field.
Career opportunities: These graduates can get jobs in public and private organisations, environment consultancies, research establishments, commercial and industrial enterprises, higher education institutes and many more.
Job roles:
Soil Scientist
Professor Soil
Pedologist
Ecologist
Environmental Scientist
Geologist
Hydrologist
Scientific Laboratory Technician
Soil Conservation Technician
Scope of soil science: Soil science has well defined and developed discipline. The science dealing with soil as a natural resource on the surface of the earth, including pedology and the physical, chemical and biological and fertility properties of soil. Students of soil science learn to identify, interpret, and manage soils for agriculture, forestry, rangeland, ecosystems, urban uses and mining and reclamation in an environmentally responsible way.

If you want to design software that interacts with people, then you'll be designing processes that implement that interaction. A process is a sequence of steps that alter some part of the world. You model a process with an algorithm.
The richer the algorithms you can design, the richer the processes you can model in your interaction, and the richer the interaction will be. Ergo, you want to be able to design rich, complex algorithms that express interesting ideas. The language of algorithms in mathematics. For example, suppose you'd like to have some characters whose interactions involve something more than shooting each other.
Let's take an extremely simple interaction: Mary watches Tom do something to Joe. The niceness or nastiness of Tom's action is represented by the variable nice nasty. Mary's affection for Joe is represented by the variable affection [Mary] [Joe].
Can you devise an algorithm that will calculate the degree to which Mary's affection for Tom will be altered by his action toward Joe?
It really is quite trivial, if you can't come up with something good, perhaps you need to bolster your understanding of mathematics.
Hint: we're not talking high-powered math. The first year high school algebra is sufficient.