{"type": "FeatureCollection", "features": [{"id": "10.3389/fenvs.2021.650155", "type": "Feature", "geometry": null, "properties": {"updated": "2026-06-26T16:23:09Z", "type": "Journal Article", "created": "2021-04-06", "title": "Effects of Microplastic Fibers on Soil Aggregation and Enzyme Activities Are Organic Matter Dependent", "description": "<p>Microplastic as an anthropogenic pollutant accumulates in terrestrial ecosystems over time, threatening soil quality and health, for example by decreasing aggregate stability. Organic matter addition is an efficient approach to promote aggregate stability, yet little is known about whether microplastic can reduce the beneficial effect of organic matter on aggregate stability. We investigated the impacts of microplastic fibers in the presence or absence of different organic materials by carrying out a soil incubation experiment. This experiment was set up as a fully factorial design containing all combinations of microplastic fibers (no microplastic fiber addition, two different types of polyester fibers, and polyacrylic) and organic matter (no organic matter addition, Medicago lupulina leaves, Plantago lanceolata leaves, wheat straw, and hemp stems). We evaluated the percentage of water-stable aggregates (WSA) and activities of four soil enzymes (\uffce\uffb2-glucosidase, \uffce\uffb2-D-celluliosidase, N-acetyl-b-glucosaminidase, phosphatase). Organic matter addition increased WSA and enzyme activities, as expected. In particular, Plantago or wheat straw addition increased WSA and enzyme activities by 224.77 or 281.65% and 298.51 or 55.45%, respectively. Microplastic fibers had no effect on WSA and enzyme activities in the soil without organic matter addition, but decreased WSA and enzyme activities by 26.20 or 37.57% and 23.85 or 26.11%, respectively, in the presence of Plantago or wheat straw. Our study shows that the effects of microplastic fibers on soil aggregation and enzyme activities are organic matter dependent. A possible reason is that Plantago and wheat straw addition stimulated soil aggregation to a greater degree, resulting in more newly formed aggregates containing microplastic, the incorporated microplastic fibers led to less stable aggregates, and decrease in enzyme activities This highlights an important aspect of the context dependency of microplastic effects in soil and on soil health. Our results also suggest risks for soil stability associated with organic matter additions, such as is common in agroecosystems, when microplastics are present.</p>", "keywords": ["2. Zero hunger", "570", "soil health", "soil aggregate stability", "500 Naturwissenschaften und Mathematik::570 Biowissenschaften; Biologie::570 Biowissenschaften; Biologie", "04 agricultural and veterinary sciences", "15. Life on land", "01 natural sciences", "enzyme activity", "Environmental sciences", "plastic pollution", "13. Climate action", "0401 agriculture", " forestry", " and fisheries", "GE1-350", "soil structure", "microplastic", "organic matter", "0105 earth and related environmental sciences"]}, "links": [{"href": "https://doi.org/10.3389/fenvs.2021.650155"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Frontiers%20in%20Environmental%20Science", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.3389/fenvs.2021.650155", "name": "item", "description": "10.3389/fenvs.2021.650155", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.3389/fenvs.2021.650155"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2021-04-06T00:00:00Z"}}, {"id": "10.13080/z-a.2018.105.025", "type": "Feature", "geometry": null, "properties": {"updated": "2026-06-26T16:21:32Z", "type": "Journal Article", "created": "2018-08-06", "title": "The interaction of soil aggregate stability with other soil properties as influenced by manure and nitrogen fertilization", "description": "Soil water-stable aggregate (WSA) stability is one of the most important indicators of soil health, because it influences chemical, biological and other physical properties. At the same time, WSA formation, stabilization and degradation are also some of the most complex processes that occur in the soil, making them difficult to fully understand. In particular, there is a lack of research on WSA stability in the Baltic region. To gain a better understanding how aggregation occurs in Estonian pedo-climatic conditions, this study was conducted in 2014\u2013 2015 in a sandy loam Stagnic Luvisol (LV-st) (WRB, 2014). Potato and barley plots were analysed in a three-year crop rotation (potato \u2192 spring wheat \u2192 barley) with straw removal. The nitrogen (N) fertilization treatments were 0, 40, 80, 120 and 160 kg ha-1 yr-1 N, both without and with 40 Mg ha-1 fermented cattle farmyard manure (FYM) application prior to potato planting in the previous autumn. WSA stability was determined by Eijkelkamp\u2019s wet sieving apparatus from air-dried soil samples of less than 2 mm in diameter. The study revealed a negative correlation (r = \u22120.16) between increased N rates and WSA stability, regardless of FYM applications. Although soil organic carbon (SOC) content increased with additional N fertilization rates, the reduction in soil acidity (pHKCl) levels caused by N fertilization, most likely repealed the positive SOC content effect on WSA stability. In general, compared with sole N fertilization, FYM application had a positive effect on WSA stability. However, even though WSA stability did not always increase with FYM applications, it still had a positive effect on bulk density, SOC content and soil acidity levels. Further research is needed in Estonia due to the complexities involved in the soil aggregation process.", "keywords": ["2. Zero hunger", "soil aggregate stability", "articles", "barley", "potato", "0401 agriculture", " forestry", " and fisheries", "farmyard manure", "04 agricultural and veterinary sciences", "15. Life on land", "nitrogen fertilizer"]}, "links": [{"href": "https://doi.org/10.13080/z-a.2018.105.025"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Zemdirbyste-Agriculture", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.13080/z-a.2018.105.025", "name": "item", "description": "10.13080/z-a.2018.105.025", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.13080/z-a.2018.105.025"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2018-08-06T00:00:00Z"}}, {"id": "10.17221/233/2010-pse", "type": "Feature", "geometry": null, "properties": {"license": "Open Access", "updated": "2026-06-26T16:22:06Z", "type": "Journal Article", "created": "2018-02-10", "title": "Effect Of Poultry Litter And Livestock Manure On Soil Physical And Biological Indicators In A Rice-Wheat Rotation System", "description": "Organic manure is considered as a beneficial fertilizer on soil quality and an excellent alternative resource of chemical fertilizer (CF). However, organic manure from intensive farms may have a negative impact on soil quality because of containing some harmful components, such as heavy metal and antibiotics. The aim of this study was to determine the influence of poultry litter (PL) and livestock manure (LM) from intensive farming on soil physical and biological indicators of soil quality. Results showed that PL and LM amendment increased soil macropore and mesopore volumes and decreased soil micropore volumes. Tensile strength in PL and LM treatment were lower than those in CF, while soil aggregate wet stability index were greater than those in CF. Compared with CF treatment, the microbial biomass C and N contents (+89%, +74%), soil basal respiration rate (+49%) and soil microbial quotient (+45%) in PL and LM treatment were significantly greater. Significant linear correlations were found between soil organic carbon and most soil physical and biological properties (P &lt; 0.01). The results suggested that modern intensive farm manures can be alternate chemical fertilizers as a main fertilizer to improve soil physical and biological indicators in a rice-wheat system.", "keywords": ["2. Zero hunger", "chemical fertilizer", "soil aggregate stability", "Plant culture", "0401 agriculture", " forestry", " and fisheries", "soil pore structure", "soil quality", "04 agricultural and veterinary sciences", "15. Life on land", "intensive farm manures", "6. Clean water", "SB1-1110"], "contacts": [{"organization": "Q. G. Zhao, F. Wang, X. L. Zhong, J. T. Li,", "roles": ["creator"]}]}, "links": [{"href": "https://doi.org/10.17221/233/2010-pse"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Plant%2C%20Soil%20and%20Environment", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.17221/233/2010-pse", "name": "item", "description": "10.17221/233/2010-pse", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.17221/233/2010-pse"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2011-08-31T00:00:00Z"}}, {"id": "10.3390/su13179769", "type": "Feature", "geometry": null, "properties": {"updated": "2026-06-26T16:23:38Z", "type": "Journal Article", "created": "2021-08-31", "title": "Effects of Organic Amendments on Soil Aggregate Stability and Microbial Biomass in a Long-Term Fertilization Experiment (IOSDV)", "description": "<?xml version='1.0' encoding='UTF-8'?><article><p>The effect of two types of organic amendment (manure and straw incorporation) and various doses (0\u2013200 kg N*ha\u22121) of mineral N fertilization on microbial biomass C (MBC), aggregate stability (AS), soil organic C (SOC) and grain yield were investigated in an IOSDV long-term fertilization experiment (Keszthely, Hungary). This study was conducted during years 2015\u20132016 in a sandy loam Ramann-type brown forest soil (Eutric Cambisol according to WRB). Organic amendments had a significant effect on AS, MBC and SOC, increased their values compared to the unamended control. The organic amendments showed different effects on AS and MBC. AS was increased the most by straw incorporation and MBC by manure application. The magnitude of temporal variability of AS and MBC differed. Presumably, the different effects of organic amendments and the different degrees of temporal variability explain why there was only a weak (0.173) correlation between AS and MBC. AS did not correlate with SOC or grain yield. MBC correlated (0.339) with SOC but not with the grain yield. The N fertilizer dose did not have a significant effect on AS and MBC, but had a significant effect on SOC and grain yield.</p></article>", "keywords": ["2. Zero hunger", "soil aggregate stability; microbial biomass; long-term fertilization experiment; IOSDV; organic amendment; N fertilization", "0401 agriculture", " forestry", " and fisheries", "04 agricultural and veterinary sciences", "15. Life on land"]}, "links": [{"href": "http://www.mdpi.com/2071-1050/13/17/9769/pdf"}, {"href": "https://doi.org/10.3390/su13179769"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Sustainability", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.3390/su13179769", "name": "item", "description": "10.3390/su13179769", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.3390/su13179769"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2021-08-31T00:00:00Z"}}, {"id": "10.5281/zenodo.10067563", "type": "Feature", "geometry": null, "properties": {"updated": "2026-06-26T16:24:39Z", "type": "Dataset", "title": "Cover crops improve soil structure and change OC distribution in aggregate fractions", "description": "Data set and R script on the statistic evaluation of soil data. The data derived from a long-term field trial at the Asendorf field station 70\u00a0km north of Hanover, Germany (49\u00a0m above sea level, 52\u00b045\u203248.4\u2032\u2032N 9\u00b001\u203224.3\u2032\u2032E). Data include soil data (OC, TN, bulk density, texture) as well as data from soil aggregate fractionation and evaluation of their aggregate stability.\u00a0 All methods and data will be described in an upcoming journal article (DOI will be provided soon).", "keywords": ["2. Zero hunger", "soil organic carbon stocks", "soil aggregate stability", "catch crops", "cover crops", "15. Life on land", "soil aggregate fractions"], "contacts": [{"organization": "Gentsch, Norman", "roles": ["creator"]}]}, "links": [{"href": "https://doi.org/10.5281/zenodo.10067563"}, {"rel": "self", "type": "application/geo+json", "title": "10.5281/zenodo.10067563", "name": "item", "description": "10.5281/zenodo.10067563", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.5281/zenodo.10067563"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2022-10-05T00:00:00Z"}}, {"id": "10492/6395", "type": "Feature", "geometry": null, "properties": {"updated": "2026-06-26T16:28:31Z", "type": "Journal Article", "created": "2018-08-06", "title": "The interaction of soil aggregate stability with other soil properties as influenced by manure and nitrogen fertilization", "description": "Soil water-stable aggregate (WSA) stability is one of the most important indicators of soil health, because it influences chemical, biological and other physical properties. At the same time, WSA formation, stabilization and degradation are also some of the most complex processes that occur in the soil, making them difficult to fully understand. In particular, there is a lack of research on WSA stability in the Baltic region. To gain a better understanding how aggregation occurs in Estonian pedo-climatic conditions, this study was conducted in 2014\u2013 2015 in a sandy loam Stagnic Luvisol (LV-st) (WRB, 2014). Potato and barley plots were analysed in a three-year crop rotation (potato \u2192 spring wheat \u2192 barley) with straw removal. The nitrogen (N) fertilization treatments were 0, 40, 80, 120 and 160 kg ha-1 yr-1 N, both without and with 40 Mg ha-1 fermented cattle farmyard manure (FYM) application prior to potato planting in the previous autumn. WSA stability was determined by Eijkelkamp\u2019s wet sieving apparatus from air-dried soil samples of less than 2 mm in diameter. The study revealed a negative correlation (r = \u22120.16) between increased N rates and WSA stability, regardless of FYM applications. Although soil organic carbon (SOC) content increased with additional N fertilization rates, the reduction in soil acidity (pHKCl) levels caused by N fertilization, most likely repealed the positive SOC content effect on WSA stability. In general, compared with sole N fertilization, FYM application had a positive effect on WSA stability. However, even though WSA stability did not always increase with FYM applications, it still had a positive effect on bulk density, SOC content and soil acidity levels. Further research is needed in Estonia due to the complexities involved in the soil aggregation process.", "keywords": ["2. Zero hunger", "soil aggregate stability", "articles", "barley", "potato", "0401 agriculture", " forestry", " and fisheries", "farmyard manure", "04 agricultural and veterinary sciences", "15. Life on land", "nitrogen fertilizer"]}, "links": [{"href": "https://doi.org/10492/6395"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Zemdirbyste-Agriculture", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10492/6395", "name": "item", "description": "10492/6395", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10492/6395"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2018-08-06T00:00:00Z"}}, {"id": "3196802260", "type": "Feature", "geometry": null, "properties": {"updated": "2026-06-26T16:30:22Z", "type": "Journal Article", "created": "2021-09-01", "title": "Effects of Organic Amendments on Soil Aggregate Stability and Microbial Biomass in a Long-Term Fertilization Experiment (IOSDV)", "description": "<?xml version='1.0' encoding='UTF-8'?><article><p>The effect of two types of organic amendment (manure and straw incorporation) and various doses (0\u2013200 kg N*ha\u22121) of mineral N fertilization on microbial biomass C (MBC), aggregate stability (AS), soil organic C (SOC) and grain yield were investigated in an IOSDV long-term fertilization experiment (Keszthely, Hungary). This study was conducted during years 2015\u20132016 in a sandy loam Ramann-type brown forest soil (Eutric Cambisol according to WRB). Organic amendments had a significant effect on AS, MBC and SOC, increased their values compared to the unamended control. The organic amendments showed different effects on AS and MBC. AS was increased the most by straw incorporation and MBC by manure application. The magnitude of temporal variability of AS and MBC differed. Presumably, the different effects of organic amendments and the different degrees of temporal variability explain why there was only a weak (0.173) correlation between AS and MBC. AS did not correlate with SOC or grain yield. MBC correlated (0.339) with SOC but not with the grain yield. The N fertilizer dose did not have a significant effect on AS and MBC, but had a significant effect on SOC and grain yield.</p></article>", "keywords": ["2. Zero hunger", "soil aggregate stability; microbial biomass; long-term fertilization experiment; IOSDV; organic amendment; N fertilization", "0401 agriculture", " forestry", " and fisheries", "04 agricultural and veterinary sciences", "15. Life on land"], "contacts": [{"organization": "G\u00e1bor Csit\u00e1ri, Zolt\u00e1n T\u00f3th, M\u00f3nika K\u00f6k\u00e9ny,", "roles": ["creator"]}]}, "links": [{"href": "http://www.mdpi.com/2071-1050/13/17/9769/pdf"}, {"href": "https://doi.org/3196802260"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Sustainability", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "3196802260", "name": "item", "description": "3196802260", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/3196802260"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2021-08-31T00:00:00Z"}}], "links": [{"rel": "self", "type": "application/geo+json", "title": "This document as GeoJSON", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=soil+aggregate+stability&f=json", "hreflang": "en-US"}, {"rel": "alternate", "type": "text/html", "title": "This document as HTML", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=soil+aggregate+stability&f=html", "hreflang": "en-US"}, {"rel": "collection", "type": "application/json", "title": "Collection URL", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main", "hreflang": "en-US"}, {"type": "application/geo+json", "rel": "first", "title": "items (first)", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=soil+aggregate+stability&", "hreflang": "en-US"}, {"rel": "last", "type": "application/geo+json", "title": "items (last)", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=soil+aggregate+stability&offset=7", "hreflang": "en-US"}], "numberMatched": 7, "numberReturned": 7, "distributedFeatures": [], "timeStamp": "2026-06-27T13:30:13.274374Z"}