Ключевые слова: agricultural, agriculture, ammonia, black, blue, brown, calcium, carbide, dap, diammonium, fertile, fertiliser, fertilizer, garden, grain, growth, industry, inorganic, magnesium, mineral, nitrate, nitrogen, organic, phosphate, phosphorus, pink, potash, potassium, red, rock, roots, sodium, soil, sulfate, synthetic, urea, white,