Amending the Soil (for Hardneck Garlic)
Measure distances accurately.
Calculate area of a triangle and rectangle.
Use ratios and proportions.
Students began practicing area calculations in the classroom. We started with basic rectangular shapes, using the formula A=LW, We used measurements taken of the garden beds from a previous lesson. We researched the recipe on the back of the SoPo bag, and reduced it down to 1 lb of supplement for every 160 square feet. Students made a plan to divide the area by 160 to solve for the correct amount of SoPo. Next, students practiced calculating area of a triangle using the formula A=(1/2)BH. Again, they used the ratio of 1 lb of SoPo for every 160 square feet.
When familiar with the process of calculating area of triangles and squares, the class went out to a plot in the garden reserved for a crop of garlic. The plot was irregular in shape, yet could be visualized as a rectangle and triangle. Measurements were taken of the triangle’s base and height and of the rectangle’s width and length.
We noticed that the triangle’s height was the same as the rectangle’s width. Students calculated square footage, then related the area of the garden plot to the SoPo recipe, weighed the correct amount, and worked as a team to mix SoPo into the soil.
Students planted garlic bulbs in the fertile soil. Additional Bone Meal was added to each hole before the bulb was placed in the ground and covered. Projected harvest is August of 2008.