Question

"PUSA STFR METER KIT" is used for

• A. Plant N content
• B. Crop irrigation requirement
• C. Pesticide formulation
• D. Soil available N content

Hint:

PUSA STFR Meter stands for "Soil Test Fertilizer Recommendation" Meter.
It is a portable, field-level digital device developed by IARI to test soil macronutrients (N, P, K), pH, and EC.

Answer 1

The Correct Option is D

Step 1: Understanding the Concept:
On-spot soil testing kits are portable tools designed to provide rapid, field-level estimates of soil fertility, helping farmers make timely decisions about nutrient management.

Step 2: Detailed Explanation:
The PUSA STFR METER KIT (Soil Test Fertilizer Recommendation Meter) is a portable digital soil test kit developed by the Indian Agricultural Research Institute (IARI), New Delhi.
This kit is designed for rapid, on-farm soil testing to evaluate soil health and available nutrients.
It is used to estimate several soil fertility parameters, including:
1. Soil pH and Electrical Conductivity (EC).
2. Soil available Nitrogen (N), available Phosphorus (P), and available Potassium (K).
3. Available Sulfur (S) and micronutrients like Zinc (Zn), Boron (B), and Iron (Fe).
The kit includes a built-in microcontroller that generates soil-test-based fertilizer recommendations for various crops.
This helps prevent excessive fertilizer application and reduces production costs.
The other options listed (plant nitrogen content, irrigation requirements, and pesticide formulations) are evaluated using different instruments and methods.

Step 3: Final Answer:
The PUSA STFR METER KIT is used for estimating soil available N content, which corresponds to Option (D).