1. What is Lime Requirement?

Lime Requirement (LR) is the amount of agricultural lime needed to raise the soil pH to a desired level for optimal crop growth. It's calculated based on soil buffer capacity, application depth, and soil bulk density.

2. How Does the Calculator Work?

The calculator uses the Lime Requirement formula:

Where:

• \( \text{Buffer Index} \) — Soil buffer capacity (tons/acre)
• \( \text{Depth} \) — Application depth (inches)
• \( \text{Bulk Density} \) — Soil bulk density (g/cm³)

Explanation: The equation calculates the amount of lime needed based on soil properties and desired application depth.

3. Importance of Lime Requirement Calculation

Details: Accurate lime requirement calculation is essential for proper soil pH management, which affects nutrient availability, microbial activity, and overall crop productivity.

4. Using the Calculator

Tips: Enter buffer index in tons/acre, depth in inches, and bulk density in g/cm³. All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What is buffer index?
A: Buffer index represents the soil's resistance to pH change and indicates how much lime is needed to change the pH by a specific amount.

Q2: How deep should lime be applied?
A: Typical application depth is 6-8 inches for most crops, as this is the primary root zone where pH adjustment is most beneficial.

Q3: What is typical bulk density for agricultural soils?
A: Most agricultural soils have bulk densities between 1.1-1.6 g/cm³, with lower values indicating more porous, organic-rich soils.

Q4: When is the best time to apply lime?
A: Lime is best applied several months before planting to allow time for it to react with the soil and adjust pH effectively.

Q5: How often should soil be tested for lime requirements?
A: Soil should be tested every 2-3 years to monitor pH changes and determine if additional lime applications are needed.