Item talk:Q234585
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{
"USGS Publications Warehouse": { "@context": "https://schema.org", "@type": "Article", "additionalType": "Journal Article", "name": "Simulating maize yield and bomass with spatial variability of soil field capacity", "identifier": [ { "@type": "PropertyValue", "propertyID": "USGS Publications Warehouse IndexID", "value": "70156292", "url": "https://pubs.usgs.gov/publication/70156292" }, { "@type": "PropertyValue", "propertyID": "USGS Publications Warehouse Internal ID", "value": 70156292 }, { "@type": "PropertyValue", "propertyID": "DOI", "value": "10.2134/agronj2015.0206", "url": "https://doi.org/10.2134/agronj2015.0206" } ], "journal": { "@type": "Periodical", "name": "Agronomy Journal", "volumeNumber": "108", "issueNumber": "1" }, "inLanguage": "en", "isPartOf": [ { "@type": "CreativeWorkSeries", "name": "Agronomy Journal" } ], "datePublished": "2015", "dateModified": "2016-01-06", "abstract": "Spatial variability in field soil properties is a challenge for system modelers who use single representative values, such as means, for model inputs, rather than their distributions. In this study, the root zone water quality model (RZWQM2) was first calibrated for 4 yr of maize (Zea mays\u00a0L.) data at six irrigation levels in northern Colorado and then used to study spatial variability of soil field capacity (FC) estimated in 96 plots on maize yield and biomass. The best results were obtained when the crop parameters were fitted along with FCs, with a root mean squared error (RMSE) of 354 kg ha\u20131\u00a0for yield and 1202 kg ha\u20131\u00a0for biomass. When running the model using each of the 96 sets of field-estimated FC values, instead of calibrating FCs, the average simulated yield and biomass from the 96 runs were close to measured values with a RMSE of 376 kg ha\u20131\u00a0for yield and 1504 kg ha\u20131\u00a0for biomass. When an average of the 96 FC values for each soil layer was used, simulated yield and biomass were also acceptable with a RMSE of 438 kg ha\u20131\u00a0for yield and 1627 kg ha\u20131\u00a0for biomass. Therefore, when there are large numbers of FC measurements, an average value might be sufficient for model inputs. However, when the ranges of FC measurements were known for each soil layer, a sampled distribution of FCs using the Latin hypercube sampling (LHS) might be used for model inputs.", "description": "14 p.", "publisher": { "@type": "Organization", "name": "American Society of Agronomy" }, "author": [ { "@type": "Person", "name": "Nolan, Bernard T. btnolan@usgs.gov", "givenName": "Bernard T.", "familyName": "Nolan", "email": "btnolan@usgs.gov", "identifier": { "@type": "PropertyValue", "propertyID": "ORCID", "value": "0000-0002-6945-9659", "url": "https://orcid.org/0000-0002-6945-9659" }, "affiliation": [ { "@type": "Organization", "name": "National Water Quality Program", "url": "https://www.usgs.gov/programs/national-water-quality-program" }, { "@type": "Organization", "name": "National Water Quality Assessment Program", "url": "https://www.usgs.gov/programs/national-water-quality-program" } ] }, { "@type": "Person", "name": "Ma, Liwang", "givenName": "Liwang", "familyName": "Ma", 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