Intensification of arsenic toxicity to paddy rice by hydrogen sulfide and ferrous iron, 2: Effects of ferric sulfate and ferric hydroxide application on arsenic toxicity to rice plants

agricultural chemicals arsenic cereals crops economic plants elements ferrous sulphate fertilizers grain crops heavy metals industrial pollutants injurious factors inorganic compounds iron metals micronutrient fertilizers plants pollutants rice salts semimetals sulphides symptoms toxicity transition elements