Ключевые слова: agriculture, ammonia, ammonium, animal, background, blur, calcium, carbamide, chemical, compound, crop, earth, fertilizer, grain, growth, hand, happy new year, human excreta, industry, marketing, material, matter, mineral, natural, nitrate, nitrogen, nutrients, organic, pattern, plant, potash, seed, soil, straw, sulfate, sulfur, synthetic, urea, vegetable matter,