The benefits of soil organic input on crop yields have long been discussed, yet details of their relationship remain controversial. This study considers the effects of different residue management on crop performance as assessed by yield and nitrogen use efficiency (NUE). Three residue management (residue removal, residue incorporation, and residue incorporation\uffe2\uff80\uff89+\uffe2\uff80\uff89added poultry manure), combined with five levels of N application, were studied in a long-term experiment starting in 1966. Crop residue incorporation improved maize yield by 12% (nutritional effect) and sugar beet yield by 16% (non-nutritional), and the combination of crop residue incorporation with added poultry manure increased both winter wheat and sugar beet yields by 8% (nutritional effect). The NUE values of mineral fertiliser were almost three-fold those of residues and the combination of residue with poultry manure, except in sugar beet and maize, where NUE of mineral fertilizer approached those observed for residues (0.44 vs 0.45, on average). In wheat, NUE for residue incorporation with added poultry manure was nearly double the NUE for residues alone. Residue management effects depended on crop type; spring-sown crops showing stronger effects than those sown in autumn. Residues primarily produced a nutritional effect, suggesting that they decomposed within 1\uffc2\uffa0year. While residue use offers little potential for soil improvement, it does reduce the need for fertilisers.Sorption properties of various biochars have been extensively investigated by many researchers. One of the parameters that have a significant impact on sorption properties is pyrolysis temperature. This paper presents a study on the effect of pyrolysis temperature (425, 575, 725 \uffc2\uffb0C) on the sorption properties of poultry-manure-derived biochar (BPM). The produced biochars, i.e., BPM425, BPM575 and BPM725, demonstrated specific properties at 425, 525 and 752 \uffc2\uffb0C such as high pH (10.40, 10.65 and 12.45), high ash contents (52.07, 61.74 and 78.38%) and relatively low BET (Brunauer, Emmett and Teller) surface area (11, 17 and 19 m2\uffc2\uffb7g\uffe2\uff88\uff921). The analysis of the mineral phases of the BPMs confirmed the buffering capacity. The investigated biochars were tested for sorption of Zn, Cd and Pb in mono-, double- and triple-metal batch sorption tests. According to the obtained results, biochar produced at a temperature of 575 \uffc2\uffb0C (BPM575) can function as a sufficient sorbent for the removal of Zn, Cd and Pb from a water solution. The presented results do not confirm the effect of competing metal ions on the sorption efficiency of the selected metals by the investigated biochars. Based on that, the studied biochar sorbents can be used in environments contaminated with many metals.
", "keywords": ["ADSORPTION", "sorption", "pyrolysis temperature", "poultry manure", "0211 other engineering and technologies", "02 engineering and technology", "PERFORMANCE", "FEEDSTOCK SOURCES", "01 natural sciences", "AQUEOUS-SOLUTION", "Article", "MECHANISMS", "CARBON", "Chemistry", "poultry manure; biochar; pyrolysis temperature; sorption; heavy metals; soil contamination", "REMOVAL", "Earth and Environmental Sciences", "CD(II)", "STRAW", "biochar", "heavy metals", "FRACTIONS", "soil contamination", "0105 earth and related environmental sciences"]}, "links": [{"href": "http://www.mdpi.com/1996-1944/14/21/6566/pdf"}, {"href": "https://www.mdpi.com/1996-1944/14/21/6566/pdf"}, {"href": "https://doi.org/10.3390/ma14216566"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Materials", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.3390/ma14216566", "name": "item", "description": "10.3390/ma14216566", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.3390/ma14216566"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2021-11-01T00:00:00Z"}}, {"id": "10.5281/zenodo.16316472", "type": "Feature", "geometry": null, "properties": {"license": "unspecified", "updated": "2026-06-26T16:26:14Z", "type": "Dataset", "title": "Poultry Manure Application Enhances Hydraulic Properties and Aggregate Stability of Nigerian Soils", "description": "Farmers in the tropics usually incorporate organic manure to improve the low levels of soil organic matter. However, little attention is given to how this incorporated manure affects soil physical properties. This study assessed the hydraulic properties and aggregate stability of five Nigerian benchmark soils of varied textures under different rates of poultry manure application. The soil types were Iwo, Apomu, Egbeda, Oba, and Itagunmodi series, as well as continuously cropped land with extensively degraded soil. The soils were sampled at 0-15 cm soil depth (plough-layer) and subsequently air-dried and sieved through a 20 mm mesh. For each soil type, 0, 2.5, 5, 7.5, and 10 tons ha-1 of cured poultry manure were applied, and the experiment was replicated three times, resulting in a total of 90 samples (6 soil types x 5 manure levels x 3 replicates). The samples were arranged in completely randomized design and maintained at 75% field capacity for six weeks. At the end of week six, bulk density, aggregate stability, unsaturated soil hydraulic conductivity, sorptivity, pH, organic carbon, and total nitrogen were analyzed. Data were analyzed using analysis of variance and means were separated using Duncan's multiple range test at p\u22640.05. Results revealed that the soils\u2019 texture ranged from sandy loam, loamy sand and clay loam. Soil bulk density decreased with increased incorporation of poultry manure. Generally, unsaturated hydraulic conductivity increased with the incorporation of poultry manure across all the soil series except for Apomu and Oba series. Sorptivity and aggregate stability increased with the incorporation of poultry manure. Soil pH increased with poultry manure incorporation in Apomu, Oba, Iwo, Itagunmodi and the highly cultivated Iwo series, but reduced in Egbeda series. As expected, organic carbon and total nitrogen increased with poultry manure application. Conclusively, poultry manure improved soil hydraulic properties and soil aggregation, which has positive implications on water quality and availability, groundwater recharge, erosion control, fertilizer use efficiency, plant growth, biodiversity and sustainable soil use", "keywords": ["Water stable aggregate", "Soil texture", "Unsaturated hydraulic conductivity", "Sorptivity", "Tropical soil", "Poultry manure"], "contacts": [{"organization": "Akinde, Bamikole, Tijani, Fatai Oladapo, Ibitoye, Rotimi George, Oyedele, Durodoluwa Joseph,", "roles": ["creator"]}]}, "links": [{"href": "https://doi.org/10.5281/zenodo.16316472"}, {"rel": "self", "type": "application/geo+json", "title": "10.5281/zenodo.16316472", "name": "item", "description": "10.5281/zenodo.16316472", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.5281/zenodo.16316472"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2025-07-22T00:00:00Z"}}, {"id": "11577/3341943", "type": "Feature", "geometry": null, "properties": {"license": "Open Access", "updated": "2026-06-26T16:28:45Z", "type": "Journal Article", "created": "2020-04-17", "title": "Crop yield after 5\u00a0decades of contrasting residue management", "description": "AbstractThe benefits of soil organic input on crop yields have long been discussed, yet details of their relationship remain controversial. This study considers the effects of different residue management on crop performance as assessed by yield and nitrogen use efficiency (NUE). Three residue management (residue removal, residue incorporation, and residue incorporation\uffe2\uff80\uff89+\uffe2\uff80\uff89added poultry manure), combined with five levels of N application, were studied in a long-term experiment starting in 1966. Crop residue incorporation improved maize yield by 12% (nutritional effect) and sugar beet yield by 16% (non-nutritional), and the combination of crop residue incorporation with added poultry manure increased both winter wheat and sugar beet yields by 8% (nutritional effect). The NUE values of mineral fertiliser were almost three-fold those of residues and the combination of residue with poultry manure, except in sugar beet and maize, where NUE of mineral fertilizer approached those observed for residues (0.44 vs 0.45, on average). In wheat, NUE for residue incorporation with added poultry manure was nearly double the NUE for residues alone. Residue management effects depended on crop type; spring-sown crops showing stronger effects than those sown in autumn. Residues primarily produced a nutritional effect, suggesting that they decomposed within 1\uffc2\uffa0year. While residue use offers little potential for soil improvement, it does reduce the need for fertilisers.