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Updated: Jun 12, 2026

Microplot Design and Plant and Soil Sample Preparation for 15Nitrogen Analysis

Microplot Design and Plant and Soil Sample Preparation for ¹⁵Nitrogen Analysis

Published on: May 10, 2020

Nitrogen use scenario in India.

¹Department of Soil Science, CCS Haryana Agricultural University, 125004, Hisar, India. apgupta1@yahoo.com

Science in China. Series C, Life Sciences

|June 16, 2010

Summary

This summary is machine-generated.

Indian agriculture saw a significant rise in nitrogen fertilizer use, but consumption has stabilized, suggesting potential reductions. Accounting for nitrogen in crop roots could reveal higher nutrient use efficiency than previously reported.

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Published on: October 7, 2020

Area of Science:

Agricultural Science
Soil Science
Agronomy

Background:

Nitrogen is a critical plant nutrient essential for agricultural production.
Indian agriculture's nitrogen (N) fertilizer consumption surged from 55,000 tons (1950-1951) to 11.31 million tons (2001-2002), paralleling food production increases.
Recent trends show stabilized N fertilizer consumption in India, indicating potential for reduced usage.

Purpose of the Study:

To review nitrogen use efficiency in Indian agriculture.
To highlight the discrepancy in calculating N use efficiency by excluding root nitrogen.
To discuss strategies for improving fertilizer use efficiency and reducing atmospheric N release.

Main Methods:

Review of existing literature on nitrogen consumption and use efficiency in Indian agriculture.
Analysis of N uptake data, including above-ground plant parts and roots.
Discussion of management practices for organic sources and fertilizer application.

Main Results:

Nitrogen use efficiency is typically reported between 30% and 50%, often excluding nitrogen content in crop roots.
Controlled experiments indicate that root N uptake can range from 18% to 44% of the N removed by above-ground parts.
Including root nitrogen in calculations would result in higher reported N use efficiency.

Conclusions:

Current nitrogen use efficiency calculations may underestimate the actual efficiency by omitting root nitrogen.
Improved management of organic nutrient sources is crucial for enhancing fertilizer use efficiency.
Optimizing nitrogen management can lead to reduced fertilizer consumption and minimized atmospheric nitrogen release.