Q1: NPK fertiliser is a __________ fertiliser.

ANS:B - mixed

NPK fertilizer is a type of fertilizer that contains three main nutrients essential for plant growth: nitrogen (N), phosphorus (P), and potassium (K). These nutrients are often referred to by their chemical symbols, hence the name "NPK." A mixed fertilizer like NPK blends these nutrients together in varying ratios, depending on the needs of different types of plants or specific soil conditions. For example, a common NPK ratio might be 10-10-10, indicating equal parts of nitrogen, phosphorus, and potassium. However, there are many different formulations available to suit the requirements of specific crops or soil types. By combining these essential nutrients into a single product, NPK fertilizers provide plants with a balanced diet, promoting healthy growth, strong root development, and improved yield. This convenience and versatility make NPK fertilizers widely used in agriculture, horticulture, and gardening.