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  "authors": [
            
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    {
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    {
            
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      "author_department": "Department of Plant Production and Soil 
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Science",
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      "author_email": "",
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      "author_email": "john.annandale@up.ac.za",
            
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      "author_name": "John",
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      "author_name": "John",
            
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      "author_organization": "University of Pretoria",
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      "author_organization": "University of Pretoria",
            
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      "author_surname": "Annandale",
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      "author_department": "Department of Plant Production and Soil 
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      "author_department": "Department of Plant Production and Soil 
            
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Science",
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Science",
            
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      "author_email": "",
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      "author_name": "N.",
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      "author_organization": "University of Pretoria",
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      "author_organization": "University of Pretoria",
            
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      "author_surname": "Benade",
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      "author_department": "Department of Plant Production and Soil 
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      "author_department": "Department of Plant Production and Soil 
            
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Science",
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Science",
            
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      "author_email": "",
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      "author_email": "",
            
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      "author_name": "Nebojsa",
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      "author_name": "Nebojsa",
            
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      "author_organization": "University of Pretoria",
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      "author_organization": "University of Pretoria",
            
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      "author_surname": "Jovanovic",
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      "author_department": "Department of Plant Production and Soil 
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      "author_department": "Department of Plant Production and Soil 
            
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Science",
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Science",
            
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      "author_email": "",
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      "author_email": "",
            
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      "author_name": "John",
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      "author_name": "Martin",
            
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      "author_organization": "University of Pretoria",
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      "author_organization": "University of Pretoria",
            
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      "author_surname": "Steyn",
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    {
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      "author_department": "Department of Plant Production and Soil 
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      "author_department": "Department of Plant Production and Soil 
            
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Science",
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Science",
            
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      "author_email": "",
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      "author_email": "",
            
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      "author_name": "N.",
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      "author_name": "Neil",
            
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      "author_organization": "University of Pretoria",
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      "author_organization": "University of Pretoria",
            
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      "author_surname": "du Sautoy",
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      "author_surname": "du Sautoy",
            
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    }
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  ],
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  "citation_title": "ANNANDALE JG, BENADE N, JOVANOVIC NZ, STEYN JM 
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  "citation_title": "ANNANDALE JG, BENADE N, JOVANOVIC NZ, STEYN JM 
            
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and DU SAUTOY N (1999) Facilitating Irrigation Scheduling by Means of 
54
and DU SAUTOY N (1999) Facilitating Irrigation Scheduling by Means of 
            
55
the Soil Water Balance Model. WRC Report No. 753/1/99. Water Research 
55
the Soil Water Balance Model. WRC Report No. 753/1/99. Water Research 
            
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Commission, Pretoria.",
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Commission, Pretoria.",
            
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  "contact_person": [
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  "contact_person": [
            
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    {
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    {
            
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      "contact_department": "Department of Plant Production and Soil 
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      "contact_department": "Department of Plant Production and Soil 
            
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Science",
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Science",
            
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      "contact_email": "john.annandale@up.ac.za",
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      "contact_email": "john.annandale@up.ac.za",
            
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      "contact_name": "John",
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      "contact_name": "John",
            
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      "contact_orgnization": "University of Pretoria"
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      "contact_orgnization": "University of Pretoria"
            
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    }
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    }
            
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  ],
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  ],
            
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  "creator_user_id": "bc28a33f-dc21-4795-a57f-da7cd1aa23ea",
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  "creator_user_id": "bc28a33f-dc21-4795-a57f-da7cd1aa23ea",
            
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  "data_classification": "static",
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  "data_classification": "static",
            
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  "data_collection_organization": "University of Pretoria",
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  "data_collection_organization": "University of Pretoria",
            
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  "data_reference_date": [
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  "data_reference_date": [
            
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    {
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    {
            
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      "data_reference_date_from": "1993-01-01",
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      "data_reference_date_from": "1993-01-01",
            
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      "data_reference_date_to": "1999-12-31"
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      "data_reference_date_to": "1999-12-31"
            
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    }
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    }
            
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  ],
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  ],
            
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  "data_structure_category": "structured",
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  "data_structure_category": "structured",
            
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  "dataset_language": "English",
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  "dataset_language": "English",
            
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  "dataset_license_url": 
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  "dataset_license_url": 
            
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"https://creativecommons.org/licenses/by/4.0/",
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"https://creativecommons.org/licenses/by/4.0/",
            
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  "did_author_or_contact_organization_collect_the_data": "true",
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  "did_author_or_contact_organization_collect_the_data": "true",
            
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  "email": "john.annandale@up.ac.za",
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  "email": "john.annandale@up.ac.za",
            
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  "groups": [],
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  "groups": [],
            
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  "id": "6df6e485-f0dc-4cce-ae85-127c562d4619",
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  "id": "6df6e485-f0dc-4cce-ae85-127c562d4619",
            
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  "isopen": false,
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  "isopen": false,
            
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  "keywords": "irrigation scheduling, soil water balance, SWB model, 
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  "keywords": "irrigation scheduling, soil water balance, SWB model, 
            
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crop parameters, FAO crop factors, crop growth, evapotranspiration, 
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crop parameters, FAO crop factors, crop growth, evapotranspiration, 
            
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crop modelling, calibration, validation",
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crop modelling, calibration, validation",
            
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  "license": "Open (Creative Commons)",
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  "license": "Open (Creative Commons)",
            
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  "license_id": null,
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  "license_id": null,
            
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  "license_title": null,
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  "license_title": null,
            
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  "maintainer": null,
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  "maintainer": null,
            
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  "maintainer_email": null,
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  "maintainer_email": null,
            
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  "metadata_created": "2026-07-30T07:32:41.393192",
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  "metadata_created": "2026-07-30T07:32:41.393192",
            
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  "metadata_modified": "2026-07-30T07:32:41.393200",
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  "metadata_modified": "2026-07-30T07:34:30.977107",
            
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  "minimum_maximum_extent": [
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  "minimum_maximum_extent": [
            
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    {
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    {
            
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      "maximum_vertical_extent": "1500",
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      "maximum_vertical_extent": "1500",
            
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      "minimum_vertical_extent": "1200"
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      "minimum_vertical_extent": "1200"
            
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    }
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    }
            
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  ],
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  ],
            
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  "name": 
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  "name": 
            
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h-and-fao-parameters-for-the-soil-water-balance-swb-model-wrc-753199",
101
h-and-fao-parameters-for-the-soil-water-balance-swb-model-wrc-753199",
            
102
  "notes": "This dataset comprised crop parameter data harvested from 
102
  "notes": "This dataset comprised crop parameter data harvested from 
            
103
WRC Report 753/1/99, which facilitated irrigation scheduling by means 
103
WRC Report 753/1/99, which facilitated irrigation scheduling by means 
            
104
of the Soil Water Balance (SWB) model. The data described the 
104
of the Soil Water Balance (SWB) model. The data described the 
            
105
crop-growth and FAO crop-factor parameter databases developed for a 
105
crop-growth and FAO crop-factor parameter databases developed for a 
            
106
wide range of agronomic, vegetable, forage and tree crops, together 
106
wide range of agronomic, vegetable, forage and tree crops, together 
            
107
with the field measurements and model outputs used to calibrate and 
107
with the field measurements and model outputs used to calibrate and 
            
108
validate the SWB model. Field trials were conducted to obtain data 
108
validate the SWB model. Field trials were conducted to obtain data 
            
109
sets where these were not otherwise available, including a vegetable 
109
sets where these were not otherwise available, including a vegetable 
            
110
trial at Roodeplaat and a peach trial at Hatfield, both near Pretoria, 
110
trial at Roodeplaat and a peach trial at Hatfield, both near Pretoria, 
            
111
South Africa, with additional validation data drawn from collaborators 
111
South Africa, with additional validation data drawn from collaborators 
            
112
and published sources across several South African sites. The 
112
and published sources across several South African sites. The 
            
113
harvested dataset included: specific crop-growth parameters for the 
113
harvested dataset included: specific crop-growth parameters for the 
            
114
mechanistic SWB model (Appendix Table B1) covering canopy radiation 
114
mechanistic SWB model (Appendix Table B1) covering canopy radiation 
            
115
extinction coefficient, temperature thresholds and day-degree 
115
extinction coefficient, temperature thresholds and day-degree 
            
116
requirements, specific leaf area, dry-matter partitioning, rooting and 
116
requirements, specific leaf area, dry-matter partitioning, rooting and 
            
117
transpiration parameters; FAO crop factors by growth stage (Appendix 
117
transpiration parameters; FAO crop factors by growth stage (Appendix 
            
118
Table B2) covering stage durations, basal crop coefficients, stress 
118
Table B2) covering stage durations, basal crop coefficients, stress 
            
119
factors, root depth, crop height and allowable depletion; planting and 
119
factors, root depth, crop height and allowable depletion; planting and 
            
120
harvest dates and row spacings for vegetable cultivars; a crop 
120
harvest dates and row spacings for vegetable cultivars; a crop 
            
121
calibration and validation inventory with data sources; and 
121
calibration and validation inventory with data sources; and 
            
122
per-simulation soil-water-balance summary values. Values were 
122
per-simulation soil-water-balance summary values. Values were 
            
123
extracted from a scanned, OCR-processed report and verified against 
123
extracted from a scanned, OCR-processed report and verified against 
            
124
the source pages; cells that could not be resolved with confidence are 
124
the source pages; cells that could not be resolved with confidence are 
            
125
flagged in the accompanying workbook.",
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flagged in the accompanying workbook.",
            
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  "num_resources": 0,
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  "organization": {
            
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    "approval_status": "approved",
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    "approval_status": "approved",
            
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    "created": "2026-02-19T10:16:04.079269",
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    "created": "2026-02-19T10:16:04.079269",
            
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    "description": "The University of Pretoria (UP) is one of 
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    "description": "The University of Pretoria (UP) is one of 
            
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Africa\u2019s top universities and the largest contact university in 
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Africa\u2019s top universities and the largest contact university in 
            
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South Africa. We produce socially impactful research to find solutions 
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South Africa. We produce socially impactful research to find solutions 
            
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for the world\u2019s most pressing issues. We have a high quality of 
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for the world\u2019s most pressing issues. We have a high quality of 
            
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teaching and learning in the classroom, online, or in communities. We 
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teaching and learning in the classroom, online, or in communities. We 
            
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have support in place for our students to graduate on time as 
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have support in place for our students to graduate on time as 
            
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well-rounded, responsible citizens fully prepared for the world beyond 
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well-rounded, responsible citizens fully prepared for the world beyond 
            
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university.",
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university.",
            
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    "name": "university-of-pretoria",
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    "name": "university-of-pretoria",
            
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    "state": "active",
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    "state": "active",
            
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    "title": "University of Pretoria",
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    "title": "University of Pretoria",
            
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    "type": "organization"
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    "type": "organization"
            
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  "private": false,
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  "private": false,
            
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  "publication_date": "1999-01-01",
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  "publication_date": "1999-01-01",
            
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  "publisher": "Water Research Commission",
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  "publisher": "Water Research Commission",
            
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  "relationships_as_object": [],
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  "relationships_as_object": [],
            
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  "relationships_as_subject": [],
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  "relationships_as_subject": [],
            
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  "resources": [],
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  "resources": [],
            
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  "spatial": "{\"type\": \"Polygon\", \"coordinates\": [[[25.7, 
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  "spatial": "{\"type\": \"Polygon\", \"coordinates\": [[[25.7, 
            
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-29.1], [28.3, -29.1], [28.3, -25.6], [25.7, -25.6], [25.7, 
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-29.1]]]}",
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-25.6]]]}",
            
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  "state": "active",
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  "state": "active",
            
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  "tags": [],
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  "tags": [],
            
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  "title": "Crop Growth and FAO Parameters for the Soil Water Balance 
159
  "title": "Crop Growth and FAO Parameters for the Soil Water Balance 
            
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(SWB) Model (WRC 753/1/99)",
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(SWB) Model (WRC 753/1/99)",
            
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  "type": "dataset",
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  "type": "dataset",
            
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  "uploader_estimation_of_extent_of_processing": "refined",
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  "uploader_estimation_of_extent_of_processing": "refined",
            
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  "url": null,
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  "url": null,
            
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  "version": null,
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  "version": null,
            
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  "vertical_extent_datum": "masl",
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  "vertical_extent_datum": "masl",
            
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  "wrc_project_number": "753/1/99",
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  "wrc_project_number": "753/1/99",
            
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  "wro_theme": "Agriculture"
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  "wro_theme": "agriculture"
            
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}
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}