Female-focused agricultural books are few and far between, but this book more than makes up for the dearth.
A to Z Agriculture Coloring book printable. Excellent for a 4-H or FFA club to print and hand out or any group to use for an agriculture education activity. Check it out it is free.
Who Grew My Soup, a Farm Lesson plan. Good for careers to introduce agriculture careers
Gardening Books with 50+ fun gardening activities for kids --
The Saunders Veterinary Anatomy Coloring Book is excellent for the student who has an interest in animals and would like to explore them in detail...
Fifty Free Farmstead eBooks Learn tried-and-true methods of building and maintaining your small farm or homestead from historic US Department of Agriculture books and bulletins.
7 books about farm life that preschoolers will LOVE! http://www.mymundaneandmiraculouslife.com/2014/07/farm-unit-wrap-book-list.html
Farm Animals, published by Usborne is a great elementary level book to learn facts about many types of farm animals. Corresponding lesson plans included.
The Tree Farmer by Chuck Leavell, Nicholas Cravotta Recommended by the AFBFA
I agree with the first point. An audience is going to take away 1 to 3 major ideas. YOU decide what those ideas are.