smiling senior, gray haired, agronomist or farmer examining corn plant stems, looking for parasites

active adults agricultural agriculture agronomist analyzing angle beard cereal color conservation contemplation corn corncrop crop cultivated engineer environmental examining experiment farm farmer field food freshness genetic glass gray green growth hair haired harvesting industry landscape leaf lifestyle looking low magnifying man modification nature occupation one organic outdoors parasites person plant research rural scene scientific season seed senior seniors smiling solution soybean springtime stem stems summer sustainable technology waist worker