Biologists or agronomists makes a measurement of the amount of nitrates in the watermelon by a portable digital device. watermelon analysis for nitrates and radiation.
Man mixing soil with fertilizer
Close-up fruits and vegetables in basket and phone with Without nitrates message. Healthful organic food indoors on table. Nutrition and gardening concept.
Closeup smartphone with Without nitrates ad at background of healthful vegetables. Homegrown raw tasty veggies and healthy dieting advertisement with live camera panning left to right.
