Title:	Modeling Soil Water Dynamics and Hydrogel Doses Optimization Loam Soil under Varying Bulk Densities.
Authors:	MAGALHÃES, J. W. de O. FERREIRA, E. J. ROCHA, L. A. L. da MARCONCINI, J. M. VAZ, C. M. P. BASSOI, L. H.
Affiliation:	SÃO PAULO STATE UNIVERSITY, 18610-307 BOTUCATU, SP, BRAZIL EDNALDO JOSE FERREIRA, CNPDIA SÃO PAULO STATE UNIVERSITY, 18610-307 BOTUCATU, SP, BRAZIL JOSE MANOEL MARCONCINI, CNPDIA CARLOS MANOEL PEDRO VAZ, CNPDIA LUIS HENRIQUE BASSOI, CNPDIA.
Date Issued:	2026
Citation:	ACS Omega, v. 10, 2025.
Pages:	58306−58316
Description:	Climatechangehas intensifieddroughts inBrazil, threateningagriculture throughalteredrainfall andtemperature patterns.Apromisingapproachtomitigatingthesoilwaterdeficitistheadditionofbiodegradablehydrophilicpolymers(hydrogels). However,waterdynamicsinsoilhydrogelsystemsremaincomplexanddependonsoiltype,bulkdensity,andhydrogeldosage.The hydrophilicpropertiesofthematrixmaypersistovertime,highlightingtheimportanceofhydrogelresidualeffects.Theinfluenceof bulkdensityonpolymerdosagedynamicsremainsunderexplored, andnorapidanalyticalmethodcurrentlyexists toestimatethe doseequivalenceof activehydrogels foragriculturalpracticeswithaccuracyandwithoutexcessivetimeconsumption.Thisstudy addresses twomaingoals: (1) toevaluate theeffectivenessof hydrogel dosages insandyclay loamsoil at varyingdensities for enhancedwater retentionand(2)todevelopamachine learning-basedanalyticalmethodfor rapidestimationof activehydrogel doses fromshortsoilwatercontent timeseries.Resultsshowedasignificant increaseinsoilwaterretentionat the3gL−1dosage. Theproposedmethod,usingalocallyweightedregressionmodel,achievedahighcorrelation(0.875)andlowerror(0.749gL−1)in cross-validationwithoutrequiringdensityinformation,offeringapractical tool foragriculturalapplications.Thesefindingssupport theefficientandsustainableuseofhydrogels,providingapractical frameworkthat facilitates theirmanagementandenablesrapid field-scale interventions toimprovewateruse inagriculture.
Keywords:	Oxisol in U S Soil Taxonomy Hydrogels
DOI:	https://doi.org/10.1021/acsomega.5c05318
Type of Material:	Artigo de periódico
Access:	openAccess
Appears in Collections:	Artigo em periódico indexado (CNPDIA)