Ключевые слова: agricultural, agriculture, ammonia, ammonium, background, balls, bao type, calcium, carbamide, chemical, cultivated, farming, fertile, fertilizer, fertilizers, garden, gardening, grain, growth, industrial, industry, lime, magnesium, material, natural, nitrate, nitrogen, nutrients, orange, output, phosphate, phosphorus, plant, potash, potassium, rating, seed, sodium, sulfur, surface, urea, white,