Correcting Plant Nutrient Deficiencies Leaf Deficiency Fertiliser Explanation Correcting Plant Nutrient Deficiencies Answers Leaf Deficiency Fertiliser Explanation nitrogen blood meal It provides only nitrogen to the soil. diammonium phosphate It has the highest percentage of nitrogen. bone meal or tomato feed They provide some nitrogen, along with other minerals. phosphorus bone meal or diammonium phosphate They provide the highest amount of phosphorus. potassium sulfate of potash It contains the highest amounts of potassium. sulfate of potash magnesia It contains a high amount of potassium, along with some magnesium. greensand or tomato feed They contain small amounts of potassium along with the minerals. dolomite limestone or sulfate of potash magnesia They contain 11% magnesium. greensand It contains 3% magnesium. magnesium