Explanation: Manure is an organic substance obtained from the decomposition of plant or animal wastes. The process of adding manure to the fields to replenish the soil with nutrients. This process is called manuring. The advantages of adding manure into the fields are: It enhances the water holding capacity of the soil. it makes the soil porous due to which exchange of gases becomes easy. it increases the number of friendly microbes. it improves the texture of the soil. It adds inorganic matter to the soil which is considered very rich in plant nutrient. Thereby, the correct statements are B, C & D. Confusion PointsThey add inorganic matter to the soil which is considered very rich in plant nutrients: When organic matter like dead leaves or small insects is added to the soil they will degrade and beak into simple elements or compounds of Na, N, C, etc. Also, note that all carbon compounds are not organic. So, the given answer is correct. Additional Information Differences between Fertiliser and Manure Fertiliser Manure A fertiliser is an inorganic salt. Manure is a natural substance obtained by the decomposition of cattle dung, human waste and plant residues. A fertiliser is prepared in factories. Manure can be prepared in the field. A fertiliser does not provide any humus to the soil. Manure provides a lot of humus to the soil. Fertilisers are very rich in plant nutrients like nitrogen, phosphorus & potassium. Manure is relatively less rich in plant nutrients