Final answer:
A combination of rock phosphates and sulfuric acid used in fertilizers is called superphosphates, a type of inorganic fertilizer providing essential phosphorus for plant growth.
Step-by-step explanation:
Superphosphates:
The combination of rock phosphates and sulfuric acid that Manan uses as part of his chemical fertilizer is known as superphosphates.Phosphate fertilizers are typically produced from phosphate rock, which contains phosphorus-containing minerals. When treated with sulfuric acid (H₂SO₄), these minerals are converted into water-soluble phosphate salts, making the phosphorus available to plants for growth. This treatment process creates superphosphates, which are a highly effective fertilizer providing the essential nutrient phosphorus.
Phosphorus is critical for plant development, as it plays a key role in vital processes such as energy transfer and photosynthesis.Compared to organic fertilizers, which are derived from natural organic materials such as animal and plant wastes, superphosphates are classified as inorganic fertilizers due to their synthetic production process. These fertilizers are a component of the broader category of multi-nutrient fertilizers and are heavily used in modern agriculture to enhance crop yield and plant growth by supplying necessary macronutrients, in this case, phosphorus.