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{
    "pk": 64704,
    "title": "Nitrogen budgeting made easy for annual summer crops with a new online calculator",
    "subtitle": null,
    "abstract": "<p>The need for fertilizer nitrogen (N) highly depends on site-specific factors. In addition to fertilizers, residual soil nitrate, nitrate in the irrigation water and N mineralized from soil, organic matter can provide significant amounts of crop-available N. The need for fertilizer N can be more accurately determined by having estimations of N contribution from these sources. In this paper we discuss the factors affecting the amount of N available to summer annual crops from these sources. We introduce an online tool that calculates the amount of fertilizer N required to meet average yields expected at the field scale based on user supplied site-specific input.</p>",
    "language": "eng",
    "license": {
        "name": "Creative Commons Attribution-NonCommercial-NoDerivatives  4.0",
        "short_name": "CC BY-NC-ND 4.0",
        "text": "Attribution — You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.\n\nNonCommercial — You may not use the material for commercial purposes.\n\nNoDerivatives — If you remix, transform, or build upon the material, you may not distribute the modified material.\n\nNo additional restrictions — You may not apply legal terms or technological measures that legally restrict others from doing anything the license permits.",
        "url": "https://creativecommons.org/licenses/by-nc-nd/4.0"
    },
    "keywords": [
        {
            "word": "nitrogen budgeting"
        },
        {
            "word": "nitrogen credits"
        },
        {
            "word": "online tool"
        }
    ],
    "section": "Article",
    "is_remote": true,
    "remote_url": "https://escholarship.org/uc/item/63n9c0tw",
    "frozenauthors": [
        {
            "first_name": "Daniel",
            "middle_name": "",
            "last_name": "Geisseler",
            "name_suffix": "",
            "institution": "UC Davis",
            "department": "Department of Land, Air and Water Resources"
        },
        {
            "first_name": "Suzette",
            "middle_name": "",
            "last_name": "Turner Santiago",
            "name_suffix": "",
            "institution": "UC Davis",
            "department": "Department of Land, Air and Water Resources"
        },
        {
            "first_name": "Rob",
            "middle_name": "",
            "last_name": "Wilson",
            "name_suffix": "",
            "institution": "UC ANR Intermountain Research and Extension Center",
            "department": ""
        },
        {
            "first_name": "Konrad",
            "middle_name": "",
            "last_name": "Mathesius",
            "name_suffix": "",
            "institution": "UC Cooperative Extension Solano and Sacramento counties",
            "department": ""
        },
        {
            "first_name": "Sarah",
            "middle_name": "",
            "last_name": "Light",
            "name_suffix": "",
            "institution": "UC Cooperative Extension Sutter, Yuba and Colusa counties",
            "department": ""
        },
        {
            "first_name": "Michelle",
            "middle_name": "",
            "last_name": "Leinfelder-Miles",
            "name_suffix": "",
            "institution": "UC Cooperative Extension San Joaquin County",
            "department": ""
        },
        {
            "first_name": "Nick",
            "middle_name": "",
            "last_name": "Clark",
            "name_suffix": "",
            "institution": "UC Cooperative Extension Kings, Tulare and Fresno counties",
            "department": ""
        },
        {
            "first_name": "Sanjai",
            "middle_name": "",
            "last_name": "Parikh",
            "name_suffix": "",
            "institution": "UC Davis",
            "department": "Department of Land, Air and Water Resources"
        }
    ],
    "date_submitted": "2026-04-28T00:40:30.635003+03:00",
    "date_accepted": null,
    "date_published": "2026-04-28T10:01:00+03:00",
    "render_galley": null,
    "galleys": [
        {
            "label": "PDF",
            "type": "pdf",
            "path": "https://journalpub.escholarship.org/californiaagriculture/article/64704/galley/49600/download/"
        }
    ]
}