Q1: Ammonium sulphate fertiliser is

ANS:B - the best fertiliser for paddy.

Ammonium sulfate fertilizer is a neutral fertilizer. While it does contain nitrogen, which is an essential nutrient for plant growth, and is commonly used in agriculture, it is not the highest concentration nitrogenous fertilizer. In fact, it typically contains around 21% nitrogen by weight, which is lower compared to some other nitrogenous fertilizers like urea or ammonium nitrate. Additionally, while it can be used for paddy cultivation, it may not necessarily be considered the best fertilizer for paddy in all cases. The suitability of a fertilizer for paddy cultivation depends on various factors such as soil conditions, nutrient requirements, and crop management practices. Overall, ammonium sulfate is classified as a neutral fertilizer because it does not significantly alter the soil pH when applied and provides balanced nutrition, including nitrogen and sulfur, to plants.