If you want to get a head start, you can start working on some of these skills:
1) Written communication skills
To practice this, read what others in your field are writing in emails, or marketing literatures. Develop your own writing styles.
2) Verbal communication skills
Practice active listening, listen with intent on the issues and problems.
3) Attention to Detail
Focus on the small things. Colors, fonts, font size, word usage, context. Obsess over the details.
Email, Social Media, Website, Forums, Photography, Graphic Design, Etc.
5) Interpersonal/Social Skills
Make an effort to meet with people in the agricultural businesses or individual farmers and genuinely connect with them to better understand your audience
Talk to people in the industry, find an existing network/association, go to a conference, call them, email them, message them, connect with them on Linked in.