{"type": "FeatureCollection", "features": [{"id": "10.1007/s004420050619", "type": "Feature", "geometry": null, "properties": {"updated": "2026-07-27T16:14:50Z", "type": "Journal Article", "created": "2002-08-25", "title": "Soil Carbon And Nitrogen In A Pine-Oak Sand Plain In Central Massachusetts: Role Of Vegetation And Land-Use History", "description": "Over the last 150 years much of the landscape of eastern North America has been transformed from predominantly agricultural lands to forest. Although cultivation strongly affects important ecosystem processes such as biomass accumulation, soil organic matter dynamics, and nitrogen cycling, recovery of these processes after abandonment is insufficiently understood. We examined soil carbon and nitrogen pools and nitrogen dynamics for 16 plots on a central Massachusetts sand plain, over 80% of which had been cultivated and subsequently abandoned at least 40 years ago. The two youngest old-field forests, located on sites abandoned 40-60 years prior to our sampling, had the lowest mineral soil carbon content (0-15\u2009cm), 31% less than the average of unplowed soils. Soil carbon concentration and loss-on-ignition were significantly higher in unplowed soils than in all plowed soils, but these differences were offset by the higher bulk density in formerly plowed soils, leading to no significant differences in C content between plowed and unplowed soil. Soil C:N ratios were lower in formerly plowed soils (26.2) than in unplowed soils (28.0). While soil N content was not affected by land-use history or vegetation type, net N mineralization showed much greater variation. In situ August net nitrogen mineralization varied nearly 40-fold between stand types: lowest in pitch pine and white pine stands (-0.13 and 0.10\u2009kg\u2009N\u2009ha-1\u200928\u2009day-1), intermediate in scrub oak stands (0.48\u2009kg\u2009N\u2009ha-1\u200928\u2009day-1) and highest in aspen and mixed oak stands (1.34-3.11\u2009kg\u2009N\u2009ha-1\u200928\u2009day-1). Mineralization was more strongly related to present vegetation than to land-use history or soil N content. Appreciable net nitrification was observed only in the most recently abandoned aspen plot (0.82\u2009kg\u2009N\u2009ha-1\u200928\u2009day-1), suggesting that recent disturbance and residual agricultural lime stimulated nitrification. Carbon:nitrogen ratios increased and pH declined with stand age. Higher bulk density, lower loss-on-ignition and C:N ratios, and slightly lower C concentrations in the surface mineral soil are the persistent legacies of agriculture on soil properties. Short-term agricultural use and the low initial C and N concentrations in these sandy soils appear to have resulted in less persistent impacts of agriculture on soil C and N content and N cycling.", "keywords": ["0106 biological sciences", "soil-properties", "Forests", "Environmental-Sciences)", "01 natural sciences", "nitrogen", "variation-", "Soil", "Quercus", "soil-nitrogen", "nitrogen-", "cultivation-", "cycling-", "soil-organic-matter", "vegetation-history", "sandy-soils", "soil-carbon", "2. Zero hunger", "7440-44-0: CARBON", "carbon-", "pines-", "Soil-studies", "land-use-history", "04 agricultural and veterinary sciences", "pine-oak-sand-plain", "Chemistry", "North-America", "Nearctic-region)", "Massachusetts", "agricultural-practice", "biomass-production", "trees-", "7727-37-9: Nitrogen", "nitrification-", "United-States", "forests-", "Agricultural ecosystems", "land-use", "Massachusetts- (USA-", "forest-lands", "Nutrient dynamics", "vegetation-type", "USA", "Vegetation", "mineralization-", "15. Life on land", "Pinus", "soil-types", "Terrestrial-Ecology (Ecology-", "0401 agriculture", " forestry", " and fisheries", "agricultural-land", "ecosystems-"], "contacts": [{"organization": "Campton, Jana E., Boone, Richard D., Motzkin, Glenn, Foster, David R.,", "roles": ["creator"]}]}, "links": [{"href": "https://doi.org/10.1007/s004420050619"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Oecologia", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1007/s004420050619", "name": "item", "description": "10.1007/s004420050619", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1007/s004420050619"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "1998-10-01T00:00:00Z"}}, {"id": "10.1139/x03-218", "type": "Feature", "geometry": null, "properties": {"updated": "2026-07-27T16:19:57Z", "type": "Journal Article", "created": "2004-04-01", "title": "The Effects Of Gaps And Liming On Forest Floor Decomposition And Soil C And N Dynamics In Afagus Sylvaticaforest", "description": "<p>Despite the importance of gaps in the dynamics and management of many forest types, very little is known about the medium- to long-term soil C and N dynamics associated with this disturbance. This study was designed to test the hypothesis that gap creation and lime application, a routine measure in many European forests to ameliorate soil acidity, lead to accelerated litter decomposition and thus a reduction in the forest floor and soil C and N pools. Four gaps were created in 1989 in a mature European beech (Fagus sylvatica L.) forest on acid soil with a moder humus, and lime (3 t dolomite\uffc2\uffb7ha&#150;1) was applied to two of these and surrounding areas. Litter and fine-root decomposition was measured in 1992&#150;1993 and 1996&#150;1998 using litterbags. Forest floor (L, F, and H layers) and mineral soil (0&#150;40 cm) C and N pools were determined in 1989 and 1997. Eight years following silvicultural treatments, there was no change in C and N over the entire forest soil profile including forest floor. Reductions in the F and H layers in limed gaps were compensated for by increases in soil C and N in the surface (0&#150;10 cm) mineral soil. Decomposition of F litter was significantly accelerated in limed gaps, leading to the development of a mull&#150;moder, whereas gap creation alone had no effect on mass loss of F material in litterbags. Gap size disturbances in this acid beech forest appear to have minimal influences on soil C and N stocks. However, when combined with liming, changes in the humus form and vertical distribution of soil C and N may occur.</p>", "keywords": ["0106 biological sciences", "Decomposition", "soil nutrient", "550", "Nitrogen", "Fagus sylvatica", "forest management", "Forestry", "04 agricultural and veterinary sciences", "910", "15. Life on land", "01 natural sciences", "Humus", "gap dynamics", "forest floor", "Floor decomposition", "hypothesis testing", "Fagus", "Soils", "0401 agriculture", " forestry", " and fisheries", "Litterbags", "Keywords: Carbon", "Reduction", "Limed gaps", "nutrient dynamics"]}, "links": [{"href": "https://openresearch-repository.anu.edu.au/bitstream/1885/88024/5/01_Cowling_The_effects_of_gaps_and_liming_2004.pdf.jpg"}, {"href": "https://doi.org/10.1139/x03-218"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Canadian%20Journal%20of%20Forest%20Research", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1139/x03-218", "name": "item", "description": "10.1139/x03-218", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1139/x03-218"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2004-03-01T00:00:00Z"}}, {"id": "10.5061/dryad.537k1", "type": "Feature", "geometry": null, "properties": {"license": "unspecified", "updated": "2026-07-27T16:22:24Z", "type": "Dataset", "title": "Data from: Facilitation by leguminous shrubs increases along a precipitation gradient", "description": "unspecifiedCombining nutrient dynamics (plant nutrient uptake and soil fertility) can  help uncover mechanisms of shrub-grass interactions and assess the  validity of the stress-gradient hypothesis, which predicts that  facilitation between plants increases in stressful environments. However,  how facilitation via shrub-mediated nutrient increases varies with  precipitation is poorly resolved. We first synthesized a global dataset  from 66 studies and evaluated how shrubs affected soil organic carbon (C)  and nitrogen (N) in grasslands along a precipitation gradient. We then  made new measurements in a single grassland type encroached by leguminous  shrubs from the same genus (Caragana) to constrain the variations caused  by combining different grassland types and shrubs traits in the  meta-analysis. Specifically, we investigated how shrubs mediated N  dynamics and how shrub-grass interactions varied along a precipitation  gradient (147-342 mm) in a temperate steppe of China. At the global scale,  leguminous shrub-mediated effects on soil nutrients increased with  precipitation, while no relationship was found for non-leguminous shrub.  For the field experiment, greater N and lower \u03b415N in Caragana compared to  non-leguminous shrub (reference shrub, Salsola collina) suggested active  N-fixation in Caragana. We found that Caragana enhanced N concentration  and leaf quality (low C:N ratio) in neighbouring plants more on mesic  sites than on xeric sites. Thus, facilitation increased via higher soil N  and with decreasing environmental stress, at least along this relatively  arid precipitation gradient. Our results highlight the importance of  precipitation in determining the nutritional facilitation to neighbouring  grasses from encroaching leguminous shrubs. Conceptual frameworks for  plant facilitation may therefore need to include shrub characteristics  (N-fixers vs. non-fixers) and positive effects of higher precipitation on  this type of facilitation to characterize plant interactions along stress  gradients.", "keywords": ["2. Zero hunger", "Inner Mongolia", "stress gradient hypothesis", "nurse plant", "dryland", "15. Life on land", "shrub encroachment", "nutrient dynamics"], "contacts": [{"organization": "Zhang, Hai-Yang, L\u00fc, Xiao-Tao, Knapp, Alan K., Hartmann, Henrik, Bai, Edith, Wang, Xiao-Bo, Wang, Zheng-Wen, Wang, Xiao-Guang, Yu, Qiang, Han, Xing-Guo,", "roles": ["creator"]}]}, "links": [{"href": "https://doi.org/10.5061/dryad.537k1"}, {"rel": "self", "type": "application/geo+json", "title": "10.5061/dryad.537k1", "name": "item", "description": "10.5061/dryad.537k1", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.5061/dryad.537k1"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2018-06-09T00:00:00Z"}}, {"id": "10.4067/s0718-95162014005000031", "type": "Feature", "geometry": null, "properties": {"license": "Open Access", "updated": "2026-07-27T16:22:14Z", "type": "Journal Article", "created": "2014-07-02", "description": "Changes in soil organic carbon, dehydrogenase activity, nutrient availability and leaf nutrient concentrations in a mango orchard soil was evaluated from four years (2007-2011) field experiment on a Typic Ustocrepts soil of subtropical region in Lucknow, India. Organic (FYM, vermicompost, mulching, Azotobacter, PSM and Trichoderma harzianum) and inorganic (N, P, K) substrates were applied each year within the tree basin. It was observed that soil and leaf nutrients concentrations significantly increased in organic and inorganic amended soils as compared to control. Vermicompost, organic mulching and microbial inoculation significantly enhanced soil organic carbon content, available nutrients, dehydrogenase activity and leaf nutrient concentrations. Dehydrogenase activity was highest (1.85 ig TPF g-1 h-1) in organically treated soils. Surface soil (0-10 cm depth) showed higher dehydrogenase activity (1.29 to 1.85 ig TPF g-1 h-1) as compared to lower soil depths in all the treatments.", "keywords": ["2. Zero hunger", "dehydrogenase activity", "soil chemical properties", "leaf nutrient dynamics", "0401 agriculture", " forestry", " and fisheries", "04 agricultural and veterinary sciences", "15. Life on land", "microbial inoculants", "Vermicompost", "6. Clean water"], "contacts": [{"organization": "Adak, T, Singha, A, Kumar, K, Shukla, S.K, Singh, A, Kumar Singh, V,", "roles": ["creator"]}]}, "links": [{"href": "https://doi.org/10.4067/s0718-95162014005000031"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Journal%20of%20soil%20science%20and%20plant%20nutrition", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.4067/s0718-95162014005000031", "name": "item", "description": "10.4067/s0718-95162014005000031", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.4067/s0718-95162014005000031"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2014-01-01T00:00:00Z"}}], "links": [{"rel": "self", "type": "application/geo+json", "title": "This document as GeoJSON", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=Nutrient+dynamics&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=Nutrient+dynamics&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=Nutrient+dynamics&", "hreflang": "en-US"}, {"rel": "last", "type": "application/geo+json", "title": "items (last)", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=Nutrient+dynamics&offset=4", "hreflang": "en-US"}], "numberMatched": 4, "numberReturned": 4, "distributedFeatures": [], "timeStamp": "2026-07-28T04:01:18.444955Z"}