Q1: Effectiveness of a fertiliser is independent of the

ANS:D - none of these

The effectiveness of a fertilizer is independent of the nature of soil. Here's why:

1. Nature of Soil: While the nature of soil, including its texture, structure, organic matter content, and nutrient levels, can influence nutrient availability and uptake by plants, the effectiveness of a fertilizer primarily depends on its nutrient content and the ability of plants to absorb those nutrients. Fertilizers are designed to supply specific nutrients to plants, regardless of soil type.
2. Type of Crop: Different crops have varying nutrient requirements and growth characteristics, but the effectiveness of a fertilizer is determined by its nutrient content and how well it meets the nutritional needs of the specific crop. Fertilizers can be tailored to provide the necessary nutrients for different types of crops, but their effectiveness is not inherently tied to the type of crop.
3. pH of Soil: Soil pH can affect nutrient availability to plants, as it influences the solubility and chemical forms of nutrients in the soil. However, while adjusting soil pH may enhance nutrient uptake in some cases, the effectiveness of a fertilizer is primarily determined by its nutrient composition and the ability of plants to utilize those nutrients, rather than the pH of the soil.