Evidence map›Paper›PMID 40596103›Full record

ArticleScientific reports2025

SPAD dynamics in maize crop with precision nitrogen management under rain-fed and irrigated conditions.

K Shivashankar, M P Potdar, Sandeep Gawdiya, Aishwarya Golshetti, Aditya Kamalakar Kanade, Gurupada Balol, D P Biradar, K K Math, Nadhir Al-Ansari, Salah El-Hendawy and 2 more

Abstract read
In one paragraph

Article in Scientific reports, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.

0numbers the graph read from it
0cells of the map it votes in
6citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

6 citing papers in PubMed.

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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

12 authors.

K ShivashankarDepartment of Agronomy, College of Agriculture, UAS, Dharwad, 580005, India.
M P PotdarDepartment of Agronomy, College of Agriculture, UAS, Dharwad, 580005, India.
Sandeep GawdiyaSchool of Agriculture, Galgotias University, Greater Noida, Uttar Pradesh, 203201, India. sandeepagro78626@gmail.com.
Aishwarya GolshettiDepartment of Agronomy, College of Agriculture, V C Farm Mandya, University of Agricultural Sciences, Bengaluru, India.
Aditya Kamalakar KanadeDepartment of Agronomy, Mahatma Phule Krishi Vidyapith, Rahuri, 413722, Maharashtra, India.
Gurupada BalolAICRP on MULLaRP, UAS, Dharwad, 580005, India.
D P BiradarDepartment of Agronomy, College of Agriculture, UAS, Dharwad, 580005, India.
K K MathDepartment of Soil Science and Agriculture Chemistry, College of Agriculture, UAS, Dharwad, India.
Nadhir Al-AnsariDepartment of Civil, Environmental, and Natural Resources Engineering, Lulea University of Technology, Lulea, 97187, Sweden. nadhir.alansari@ltu.se.ORCID http://orcid.org/0000-0002-6790-2653
Salah El-HendawyDepartment of Plant Production, College of Food and Agricultural Sciences, King Saud University, P.O. Box 2460, Riyadh 11451, Saudi Arabia.
Mohamed A MattarDepartment of Agricultural Engineering, College of Food and Agriculture Sciences, King Saud University, P.O. Box 2460, Riyadh 11451, Saudi Arabia. mmattar@ksu.edu.sa.ORCID http://orcid.org/0000-0002-7506-3036
Ali SalemCivil Engineering Department, Faculty of Engineering, Minia University, Minia, 61111, Egypt. salem.ali@mik.pte.hu.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Real-time monitoring of canopy chlorophyll content is crucial for understanding crop growth and guiding precision agricultural management. The SPAD chlorophyll meter is a valuable tool for assessing nitrogen status in maize (Zea mays L.), a key cereal crop used for food, feed, and biofuels. Efficient nitrogen management is essential to maximize maize yield, particularly under varying water regimes. A study conducted over two years (2020-2021) utilized a strip plot design to investigate the spatiotemporal dynamics of SPAD readings and their correlation with maize yield under rainfed (M1) and irrigated (M2) conditions. Eight precision nitrogen management practices were implemented, including SPAD at sufficiency index and Green Seeker at response index, achieving ranges of 86-100% and 1.11-1.41, respectively. The findings revealed that irrigated maize produced significantly higher grain yields (6347 kg ha

Indexed as

Agricultural IrrigationChlorophyllCrops, AgriculturalNitrogenZea maysAgricultureEdible GrainRainChlorophyllNitrogenCorrelation analysisGrain yieldMultivariate analysisPrecision nitrogen managementSPAD dynamics

Identifiers

PMID40596103
PMCPMC12215580

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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.