जमिनीत भुसूधारके टाकली जातात कारण :
a. पिकांच्या गरजेनुरूप जमिनीचा आम्लविम्ल निर्देशांक बदलण्यासाठी.
b. पिक अन्नद्रव्यांची उपलब्धता वाढविण्यासाठी.
c. जमिनीची भौतिक स्थिती सुधारण्यासाठी.

The correct answer is Option C (All of these).

Key Points:
• Functions of Soil Amendments (भूसुधारके):
• A soil amendment is any substance (such as lime, gypsum, organic manure, biochar, or press mud) added to improve the soil's chemical, physical, and biological environment.
• Changing Soil pH (a): Liming materials (calcium carbonate) neutralize soil acidity in acid soils, whereas gypsum (CaSO₄ · 2H₂O) and iron pyrites reclaim sodic/alkali soils by displacing exchangeable sodium and reducing high pH.
• Increasing Nutrient Availability (b): Optimizing soil pH to a neutral range (6.5 - 7.5) unlocks fixed nutrients like phosphorus, potassium, and micronutrients.
• Improving Soil Physical Condition (c): Amendments promote flocculation, improve soil aggregation, enhance porosity, facilitate aeration, and boost moisture-holding capacity.
• Therefore, All of these (a, b, and c) are correct reasons.
• Key Takeaway: Soil amendments alter soil pH, enhance nutrient availability, and improve soil physical structure.