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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": "john.annandale@up.ac.za",
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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_name": "Nico",
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      "author_organization": "University of Pretoria",
            
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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_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": "Martin",
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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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      "author_surname": "Steyn",
            
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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": "Neil",
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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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  "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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  "data_collection_organization": "University of Pretoria",
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  "data_collection_organization": "University of Pretoria",
            
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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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  "email": "john.annandale@up.ac.za",
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  "email": "john.annandale@up.ac.za",
            
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  "extras": [
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      "key": "data_reference_date_from",
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      "key": "data_reference_date_from",
            
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      "value": "1993-01-01"
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      "value": "1993-01-01"
            
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    {
            
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      "key": "data_reference_date_to",
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      "key": "data_reference_date_to",
            
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      "value": "1999-12-31"
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      "value": "1999-12-31"
            
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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_modified": "2026-10-06T16:34:06.131636",
            
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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",
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h-and-fao-parameters-for-the-soil-water-balance-swb-model-wrc-753199",
            
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  "notes": "This dataset comprised crop parameter data harvested from 
106
  "notes": "This dataset comprised crop parameter data harvested from 
            
107
WRC Report 753/1/99, which facilitated irrigation scheduling by means 
107
WRC Report 753/1/99, which facilitated irrigation scheduling by means 
            
108
of the Soil Water Balance (SWB) model. The data described the 
108
of the Soil Water Balance (SWB) model. The data described the 
            
109
crop-growth and FAO crop-factor parameter databases developed for a 
109
crop-growth and FAO crop-factor parameter databases developed for a 
            
110
wide range of agronomic, vegetable, forage and tree crops, together 
110
wide range of agronomic, vegetable, forage and tree crops, together 
            
111
with the field measurements and model outputs used to calibrate and 
111
with the field measurements and model outputs used to calibrate and 
            
112
validate the SWB model. Field trials were conducted to obtain data 
112
validate the SWB model. Field trials were conducted to obtain data 
            
113
sets where these were not otherwise available, including a vegetable 
113
sets where these were not otherwise available, including a vegetable 
            
114
trial at Roodeplaat and a peach trial at Hatfield, both near Pretoria, 
114
trial at Roodeplaat and a peach trial at Hatfield, both near Pretoria, 
            
115
South Africa, with additional validation data drawn from collaborators 
115
South Africa, with additional validation data drawn from collaborators 
            
116
and published sources across several South African sites. The 
116
and published sources across several South African sites. The 
            
117
harvested dataset included: specific crop-growth parameters for the 
117
harvested dataset included: specific crop-growth parameters for the 
            
118
mechanistic SWB model (Appendix Table B1) covering canopy radiation 
118
mechanistic SWB model (Appendix Table B1) covering canopy radiation 
            
119
extinction coefficient, temperature thresholds and day-degree 
119
extinction coefficient, temperature thresholds and day-degree 
            
120
requirements, specific leaf area, dry-matter partitioning, rooting and 
120
requirements, specific leaf area, dry-matter partitioning, rooting and 
            
121
transpiration parameters; FAO crop factors by growth stage (Appendix 
121
transpiration parameters; FAO crop factors by growth stage (Appendix 
            
122
Table B2) covering stage durations, basal crop coefficients, stress 
122
Table B2) covering stage durations, basal crop coefficients, stress 
            
123
factors, root depth, crop height and allowable depletion; planting and 
123
factors, root depth, crop height and allowable depletion; planting and 
            
124
harvest dates and row spacings for vegetable cultivars; a crop 
124
harvest dates and row spacings for vegetable cultivars; a crop 
            
125
calibration and validation inventory with data sources; and 
125
calibration and validation inventory with data sources; and 
            
126
per-simulation soil-water-balance summary values. Values were 
126
per-simulation soil-water-balance summary values. Values were 
            
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extracted from a scanned, OCR-processed report and verified against 
127
extracted from a scanned, OCR-processed report and verified against 
            
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the source pages; cells that could not be resolved with confidence are 
128
the source pages; cells that could not be resolved with confidence are 
            
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flagged in the accompanying workbook.",
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flagged in the accompanying workbook.",
            
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South Africa. We produce socially impactful research to find solutions 
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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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university.",
            
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  "publication_date": "1999-01-01",
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research report",
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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 
193
  "title": "Crop Growth and FAO Parameters for the Soil Water Balance 
            
191
(SWB) Model (WRC 753/1/99)",
194
(SWB) Model (WRC 753/1/99)",
            
192
  "type": "dataset",
195
  "type": "dataset",
            
193
  "uploader_estimation_of_extent_of_processing": "refined",
196
  "uploader_estimation_of_extent_of_processing": "refined",
            
194
  "url": null,
197
  "url": null,
            
195
  "version": null,
198
  "version": null,
            
196
  "vertical_extent_datum": "masl",
199
  "vertical_extent_datum": "masl",
            
197
  "wrc_project_number": "753/1/99",
200
  "wrc_project_number": "753/1/99",
            
198
  "wro_theme": "agriculture"
201
  "wro_theme": "agriculture"
            
199
}
202
}