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The National Agricultural Library is one of four national libraries of the United States, with locations in Beltsville, Maryland and Washington, D.C. It houses one of the world's largest and most accessible agricultural information collections and serves as the nexus for a national network of state land-grant and U.S. Department of Agriculture field libraries. In fiscal year 2011 (Oct 2010 through Sept 2011) NAL delivered more than 100 million direct customer service transactions.

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Journal Article

Journal Article

Aquacrop model calibration and validation for processing tomato crop in a sub-humid climate  [2015]

Battilani, A.; Letterio, T.; Chiari, G.;

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The FAO model AquaCrop has been calibrated using historical datasets from irrigation experiments carried out from 2004 to 2012 in the Po Valley (northern Italy) sub-humid climate. Calibrated parameters have been then validated on eight independent datasets collected in a period of time ranging from 2004 to 2010. The model has been validated for the following outputs: soil-water content, total yield, harvest index, total biomass and its partition in above ground vegetation and fruit. The objective was to analyze the performance of AquaCrop under different irrigation strategies affecting the plant water status during the crop cycles and the final productivity. AquaCrop model adequately simulated processing tomato yield but it was less precise predicting harvest index and biomass growth in phenological stages other than plant maturity. Soil volumetric water content prediction was difficult to calibrate. The model seems not able to react to particular soil hydraulic conditions, like significant capillary rise from shallow water table, or accumulating errors originated by poor prediction of crop ET with deficit irrigation management. Nevertheless, getting close to harvest and in dry years, predicted values are matching better observed soil volumetric water content. In order to calibrate AquaCrop for the local condition some of the conservative parameters needed to be modified. AquaCrop, although not designed to be used to manage crop irrigation at daily step, s
hows the potentiality to be adapted or modified that respect.
From the journal
Acta horticulturae
ISSN : 0567-7572

Bibliographic information

Language:
English
Type:
Journal Article
In AGRIS since:
2016
Issue:
1081
Start Page:
167
End Page:
174
Publisher:
International Society for Horticultural Science.
All titles:
"Aquacrop model calibration and validation for processing tomato crop in a sub-humid climate"@eng
Other:
"Paper presented at the 13th International Symposium on Processing Tomato – XI World Congress Processing Tomato held June 8-11, 2014, Sirmione, Italy"
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Bibliographic information

Language:
English
Type:
Journal Article
In AGRIS since:
2016
Issue:
1081
Start Page:
167
End Page:
174
Publisher:
International Society for Horticultural Science.
All titles:
"Aquacrop model calibration and validation for processing tomato crop in a sub-humid climate"@eng
Other:
"Paper presented at the 13th International Symposium on Processing Tomato – XI World Congress Processing Tomato held June 8-11, 2014, Sirmione, Italy"