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Electrical conductivity based algorithm for precise application of liquid nitrogenous fertilizers

Indian Agricultural Research Journals

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Title Electrical conductivity based algorithm for precise application of liquid nitrogenous fertilizers
 
Creator KURMI, RAMKISHOR
LANDE, SATISH DEVRAM
MANI, INDRA
CHOBHE, KAPIL ATMARAM
PARRAY, ROAF AHMAD
KUMAR, RAJEEV
BIRLA, LALIT
DASH, SUKANTA
 
Subject Electrical conductivity, Liquid nitrogenous fertilizers, Regression model
 
Description Precise application of nitrogenous fertilizers mainly urea ammonium nitrate (UAN) and granular urea (both pure and neem-coated) in aqueous form, is critically important for basal and foliar applications. The physicochemical properties of aqueous solution of these nitrogenous fertilizers plays important role in design of any liquid fertilizer application system. The study was carried out during 2019–20 at ICAR-Indian Agricultural Research Institute, New Delhi with an aim to develop algorithms for use in sensors-based systems for real time monitoring of available N concentration in the fertilizer solution before its application. The physicochemical properties like pH, electrical conductivity (EC), specific gravity (SG), dynamic viscosity (DV), surface tension (ST) and percentage light absorbance (LA) of urea ammonium nitrate (UAN-28%), pure urea, and neem coated urea in diluted form (pre-selected N-concentrations i.e. 0.78, 0.9, 1.08, 1.33, 1.75, 2.54 and 4.67% corresponding to the dilution ratios of 1:35, 1:30, 1:25, 1:20, 1:15, 1:10 and 1:05) were measured and analyzed for their significance with N-concentration. Electrical conductivity (EC) alone showed a significant relationship with N-concentrations. Prediction models were developed for diluted UAN and granular urea fertilizers based on the EC and N-concentrations. The regression models in terms of EC to predict N-concentration had coefficients of determination (R2) of 0.998, 0.998, and 0.999 for diluted UAN, pure urea, and neem coated urea with water, respectively showed a great potential for their sensor based precise application. The controlled application of diluted liquid fertilizers with water can be achieved through sensing relevant physicochemical property.
 
Publisher Indian Council of Agricultural Research
 
Date 2024-08-05
 
Type info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
 
Format application/pdf
 
Identifier https://epubs.icar.org.in/index.php/IJAgS/article/view/149590
10.56093/ijas.v94i8.149590
 
Source The Indian Journal of Agricultural Sciences; Vol. 94 No. 8 (2024); 895–899
2394-3319
0019-5022
 
Language eng
 
Relation https://epubs.icar.org.in/index.php/IJAgS/article/view/149590/55333
https://epubs.icar.org.in/index.php/IJAgS/article/view/149590/55334
 
Rights Copyright (c) 2024 The Indian Journal of Agricultural Sciences
https://creativecommons.org/licenses/by-nc-sa/4.0