Nisha Bhattarai, Ruth H. Ellerbrock, Horst H. Gerke
{"title":"Effects of Polyvalent Cations on FTIR Spectra of Organic Matter–Cation Associations","authors":"Nisha Bhattarai, Ruth H. Ellerbrock, Horst H. Gerke","doi":"10.1002/jpln.70056","DOIUrl":"10.1002/jpln.70056","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> Background</h3>\u0000 \u0000 <p>The composition of soil organic matter (SOM) can be characterized by functional groups in the organic matter (OM). The carboxylic acid and carboxylate groups of OM show specific absorption bands in Fourier-transform infrared (FTIR) spectra. However, cation–OM interactions may affect absorption bands and limit spectral interpretation based on pre-defined wavenumbers (WN) ranges.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Aims</h3>\u0000 \u0000 <p>The aims are to quantify the effects of major soil cations on OM spectral properties in terms of intensity and WN of characteristic absorption band maxima in FTIR, and to find relations for systems of single cations with PGA which can be used for an improved spectral interpretation.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Methods</h3>\u0000 \u0000 <p>Mixtures of polygalacturonic acid (PGA) as a model substance for SOM with five cations (K<sup>+</sup>, Mg<sup>2+</sup>, Ca<sup>2+</sup>, Al<sup>3+</sup>, and Fe<sup>3+</sup>) were prepared at different stoichiometric ratios and freeze-dried. These mixtures were characterized by FTIR spectroscopy using the KBr technique. After smoothing and baseline correction, the spectral data were interpreted for the carboxylate (COO<sup>−</sup>) band in FTIR resulting from asymmetric vibrations (<i>ν</i><sub>as</sub>COO<sup>−</sup>) and normalized to polysaccharide (COC) band to obtain <i>ν</i><sub>as</sub>COO<sup>−</sup>/COC ratio.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Results</h3>\u0000 \u0000 <p>The cation–PGA mixtures showed a linear increase in <i>ν</i><sub>as</sub>COO<sup>−</sup>/COC ratio with cation concentration and a shift of the <i>ν</i><sub>as</sub>COO<sup>−</sup> band maxima towards lower WNs. The effects on <i>ν</i><sub>as</sub>COO<sup>−</sup>/COC ratios and shift were smallest for K<sup>+</sup>–PGA mixtures and largest for Al<sup>3+</sup>–PGA and Fe<sup>3+</sup>-PGA mixtures.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Conclusions</h3>\u0000 \u0000 <p>Data confirmed that the intensity and WN of <i>ν</i><sub>as</sub>COO<sup>−</sup> band maxima in FTIR of cation–PGA mixtures changed with type and concentration of cations. Especially for the Al<sup>3+</sup>–PGA and Fe<sup>3+</sup>–PGA mixtures, the intensity and WN of <i>ν</i><sub>as</sub>COO<sup>−</sup> band maxima changed linearly with cation concentration. Understanding these relations can help to improve interpretation of FTIR spectra of SOM. However, further research is needed to extend the results for more complex systems.</p>\u0000 </section>\u0000 ","PeriodicalId":16802,"journal":{"name":"Journal of Plant Nutrition and Soil Science","volume":"189 2","pages":"230-242"},"PeriodicalIF":2.8,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/jpln.70056","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147683562","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Contents: J. Plant Nutr. Soil Sci. 1/2026","authors":"","doi":"10.1002/jpln.70051","DOIUrl":"10.1002/jpln.70051","url":null,"abstract":"","PeriodicalId":16802,"journal":{"name":"Journal of Plant Nutrition and Soil Science","volume":"189 1","pages":""},"PeriodicalIF":2.8,"publicationDate":"2026-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/jpln.70051","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146130272","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Jeroen H. T. Zethof, Karsten Kalbitz, Hermann F. Jungkunst
{"title":"Soil Health—What Is It Good for?","authors":"Jeroen H. T. Zethof, Karsten Kalbitz, Hermann F. Jungkunst","doi":"10.1002/jpln.70046","DOIUrl":"10.1002/jpln.70046","url":null,"abstract":"<p>The way in which <i>soil health</i> is helping to draw people's attention to soil science is unprecedented in history. Yet, soil scientists may find it difficult to accept that this popularized term is necessary, as similar terms already exist. In this opinion, we want to draw once more the boundaries between the different concepts. We congratulate Alewell et al. for placing this discussion on a solid ground. May it provide a basis for vivid discussion, identify knowledge gaps, and boost soil awareness on a solid scientific foundation.</p>","PeriodicalId":16802,"journal":{"name":"Journal of Plant Nutrition and Soil Science","volume":"189 1","pages":"3-5"},"PeriodicalIF":2.8,"publicationDate":"2026-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/jpln.70046","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146129828","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Kateřina Hájková, Ivana Tomášková, Tomáš Holeček, Václav Bittner, Petr Šenfeld, Adam Sikora, Karolina Resnerová, Jiří Turek, Jiří Trombik, Jan Macků
{"title":"Optimizing Soil Properties Through Hydrogel and Sawdust Combinations for Better Plant Growth","authors":"Kateřina Hájková, Ivana Tomášková, Tomáš Holeček, Václav Bittner, Petr Šenfeld, Adam Sikora, Karolina Resnerová, Jiří Turek, Jiří Trombik, Jan Macků","doi":"10.1002/jpln.70045","DOIUrl":"https://doi.org/10.1002/jpln.70045","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> Aim</h3>\u0000 \u0000 <p>This multidisciplinary study explores the effects of hydrogel mixed with sawdust and soil on the sorption properties and vitality of poplar cuttings under drought conditions.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Results</h3>\u0000 \u0000 <p>The hydrogel–sawdust mixture exhibited superior water retention, absorbing up to 1.11 g water per gram of dry mixture, significantly improving soil moisture compared to soil alone. Fertilizer addition to the hydrogel enhanced nutrient availability without substantially affecting soil pH. Notably, the combination of sawdust and hydrogel balances nutrient availability while maintaining moisture levels, supporting plant growth during drought. Physiological analyses indicate that these mixtures positively affect plant vitality, as evidenced by increased photosynthetic performance. Chemical composition of plants remained largely stable, with minor changes in the proportion of cellulose and hemicelluloses.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Conclusion</h3>\u0000 \u0000 <p>This study uniquely combines scanning electron microscopy (SEM) analysis, and comprehensive chemical and physiological analyses to highlight the benefits of hydrogel in forest management, particularly under water stress conditions.</p>\u0000 </section>\u0000 </div>","PeriodicalId":16802,"journal":{"name":"Journal of Plant Nutrition and Soil Science","volume":"189 1","pages":"168-178"},"PeriodicalIF":2.8,"publicationDate":"2025-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/jpln.70045","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146136231","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Kateřina Hájková, Ivana Tomášková, Tomáš Holeček, Václav Bittner, Petr Šenfeld, Adam Sikora, Karolina Resnerová, Jiří Turek, Jiří Trombik, Jan Macků
{"title":"Optimizing Soil Properties Through Hydrogel and Sawdust Combinations for Better Plant Growth","authors":"Kateřina Hájková, Ivana Tomášková, Tomáš Holeček, Václav Bittner, Petr Šenfeld, Adam Sikora, Karolina Resnerová, Jiří Turek, Jiří Trombik, Jan Macků","doi":"10.1002/jpln.70045","DOIUrl":"10.1002/jpln.70045","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> Aim</h3>\u0000 \u0000 <p>This multidisciplinary study explores the effects of hydrogel mixed with sawdust and soil on the sorption properties and vitality of poplar cuttings under drought conditions.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Results</h3>\u0000 \u0000 <p>The hydrogel–sawdust mixture exhibited superior water retention, absorbing up to 1.11 g water per gram of dry mixture, significantly improving soil moisture compared to soil alone. Fertilizer addition to the hydrogel enhanced nutrient availability without substantially affecting soil pH. Notably, the combination of sawdust and hydrogel balances nutrient availability while maintaining moisture levels, supporting plant growth during drought. Physiological analyses indicate that these mixtures positively affect plant vitality, as evidenced by increased photosynthetic performance. Chemical composition of plants remained largely stable, with minor changes in the proportion of cellulose and hemicelluloses.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Conclusion</h3>\u0000 \u0000 <p>This study uniquely combines scanning electron microscopy (SEM) analysis, and comprehensive chemical and physiological analyses to highlight the benefits of hydrogel in forest management, particularly under water stress conditions.</p>\u0000 </section>\u0000 </div>","PeriodicalId":16802,"journal":{"name":"Journal of Plant Nutrition and Soil Science","volume":"189 1","pages":"168-178"},"PeriodicalIF":2.8,"publicationDate":"2025-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/jpln.70045","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146136256","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Leonardo Inforsato, Pablo Rosso, Magdalena Main-Knorn, Ahsan Raza, Siyu Huang, Gohar Ghazaryan, Claas Nendel
{"title":"A Stochastic Approach to Quantifying the Propagation of Uncertainty in Soil Organic Carbon Content","authors":"Leonardo Inforsato, Pablo Rosso, Magdalena Main-Knorn, Ahsan Raza, Siyu Huang, Gohar Ghazaryan, Claas Nendel","doi":"10.1002/jpln.70038","DOIUrl":"10.1002/jpln.70038","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> Background</h3>\u0000 \u0000 <p>Precision agriculture (PA) is a site-specific management approach that utilises spatiotemporal information to improve productivity while also promoting sustainability. Accurate estimates of soil properties, along with the uncertainty of these estimates, are necessary for decision-making in PA. An essential soil quantity required to accurately predict crop yield is the soil organic carbon (SOC) content. To obtain the large amount of information necessary for PA implementation, the use of satellite images has become a common practice. This allows the spatial interpolation of soil properties. However, this type of indirect approach carries higher relative uncertainties than direct measurements (e.g., laboratory experiments). Although error evaluations of soil properties resulting from indirect approaches are constantly considered, the consequences of error are not.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Aim</h3>\u0000 \u0000 <p>This work introduces a methodology to analyse the error propagation from predictions of SOC digital maps, using the Monte Carlo (MC) method.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Method</h3>\u0000 \u0000 <p>We stochastically generated an error range for SOC maps, using one original map of SOC, and used these maps as inputs for a process-based model that simulated crop yields. Our approach evaluates how the error inherent in SOC observations and the subsequent spatial interpolation impacts crop yield forecasting, providing insights for decision-making and further PA implementation.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Results</h3>\u0000 \u0000 <p>Our results show promise in the proposed method, delivering results that are difficult to obtain. The MC method was able to handle complex, non-linear error distributions and provide a comprehensive probabilistic assessment of uncertainty, which is important for accurately predicting the impact of SOC variability on crop yield.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Conclusion</h3>\u0000 \u0000 <p>This method offers a degree of flexibility and robustness that is not achievable with deterministic or simpler analytical approaches, ensuring more reliable and informative insights for PA.</p>\u0000 </section>\u0000 </div>","PeriodicalId":16802,"journal":{"name":"Journal of Plant Nutrition and Soil Science","volume":"189 1","pages":"117-130"},"PeriodicalIF":2.8,"publicationDate":"2025-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/jpln.70038","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146136243","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}