Consider a project on soil pH and vegetable yield in kitchen gardens—simple, measurable, and close to the earth. You can test with vinegar and baking soda, no fancy kits. My own pumpkin vines whisper this truth; their sprawl in my quarter's patch is a record of the soil's mood. Everyone runs for expensive microbiology, but bhogobanor ichha—nature's wish—is best studied where life is already growing without fuss.
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