Water: Middle School
Activities: "Improving Old MacDonald's Farm"
For Grades 6 - 8
Improving Old MacDonald's Farm (Full Article)(PDF) (2 pp, 1.5MB)
Exercise I. Old MacDonald's Farmland Fertilizer Dilemma
Exercise II. Mooooving Those Cows
This exercise is designed to further explore topics addressed in the accompanying article. Students work through calculations to determine how much fertilizer is needed to meet a plant's nutrient requirements. From these calculations, students draw conclusions about the most cost-effective and environmentally sound farming practices.
Individual exercises are designed to be approximately 1/2 hour to 45 minutes long. These exercises are also ordered progressively: each builds on concepts introduced in the previous.
Curricular Standards and Skills:
- word problems
- multiplying decimals
- working with money
- order of operations
- deductive reasoning
- reading comprehension
- dead zone
- pesticides, herbicides, and fungicides