Question
Which are the correct statements about the Basic Slag :
A. It is a by product from steel industry
B. It contains 8 - 12 % P2O5
C. It is an ideal source of Phosphorus for crops in acidic soils
D. It contains about 25% citrate soluble P2O5
E. It contain nitrogen as well as potassium
Choose the correct answer from the options given below :
This question was previously asked in
CUET PG 2026 Agri-Business Management Question Paper (25-Mar-2026) (Shift 2)
The correct answer is
A, B, C only
Statement Analysis for Basic Slag
Let's analyze each statement regarding Basic Slag:
- A. It is a by-product from steel industry: This statement is correct. Basic slag is generated during the steel-making process, specifically from the dephosphorization step in basic-lined furnaces (like the Thomas process).
- B. It contains 8 - 12 % P2O5: This statement is generally considered correct in the context of basic slag used as a fertilizer. The total phosphorus pentoxide (P2O5) content typically ranges from 12% to 20%, but lower values like 8-12% are also cited for certain types or grades.
- C. It is an ideal source of Phosphorus for crops in acidic soils: This statement is correct. Basic slag is alkaline in nature. Its application helps to neutralize soil acidity, and the phosphorus becomes more available for plant uptake in these improved soil conditions.
- D. It contains about 25% citrate soluble P2O5: This statement is incorrect. While basic slag's phosphorus is made available through citrate solubility, the percentage is usually higher than 25% of the total P2O5 (often cited around 60-80% solubility). Stating only 25% makes it seem less effective than it is, or the phrasing might be misleading. Given A, B, and C are correct, this must be false.
- E. It contain nitrogen as well as potassium: This statement is incorrect. Basic slag is primarily valued as a source of phosphorus and calcium. It does not contain significant amounts of nitrogen (N) or potassium (K).
Conclusion
Based on the analysis, the correct statements are A, B, and C.
Therefore, the correct option is the one that includes A, B, and C only.
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