Using EPIC model to manage irrigated cotton and maize
Simulation models are becoming of interest as a decision support system for management and assessment of crop water use and of crop production. The Environmental Policy Integrated Climate (EPIC) model was used to evaluate its application as a decision support tool for irrigation management of cotton and maize under South Texas conditions. Simulation of the model was performed to determine crop yield, crop water use, and the relationships between the yield and crop water use parameters such as crop evapotranspiration (ETc) and water use efficiency (WUE). We measured actual ETc using a weighing lysimeter and crop yields by field sampling, and then calibrated the model. The measured variables were compared with simulated variables using EPIC. Simulated ETc agreed with the lysimeter, in general, but some simulated ETc were biased compared with measured ETc. EPIC also simulated the variability in crop yields at different irrigation regimes. Furthermore, EPIC was used to simulate yield responses at various irrigation regimes with farm fields' data. Maize required ~700mm of water input and ~650mm of ETc to achieve a maximum yield of 8.5Mgha-1 while cotton required between 700 and 900mm of water input and between 650 and 750mm of ETc to achieve a maximum yield of 2.0-2.5Mgha-1. The simulation results demonstrate that the EPIC model can be used as a decision support tool for the crops under full and deficit irrigation conditions in South Texas. EPIC appears to be effective in making long-term and pre-season decisions for irrigation management of crops, while reference ET and phenologically based crop coefficients can be used for in-season irrigation management.
If you experience problems downloading a file, check if you have the proper application to view it first. In case of further problems read the IDEAS help page. Note that these files are not on the IDEAS site. Please be patient as the files may be large.
As the access to this document is restricted, you may want to look for a different version under "Related research" (further below) or search for a different version of it.
References listed on IDEAS
Please report citation or reference errors to , or , if you are the registered author of the cited work, log in to your RePEc Author Service profile, click on "citations" and make appropriate adjustments.:
- Payero, Jose O. & Melvin, Steven R. & Irmak, Suat & Tarkalson, David, 2006. "Yield response of corn to deficit irrigation in a semiarid climate," Agricultural Water Management, Elsevier, vol. 84(1-2), pages 101-112, July.
- Epperson, James E. & Hook, James E. & Mustafa, Yasmin R., 1993. "Dynamic programming for improving irrigation scheduling strategies of maize," Agricultural Systems, Elsevier, vol. 42(1-2), pages 85-101.
- Yazar, Attila & Sezen, S. Metin & Sesveren, Sertan, 2002. "LEPA and trickle irrigation of cotton in the Southeast Anatolia Project (GAP) area in Turkey," Agricultural Water Management, Elsevier, vol. 54(3), pages 189-203, April.
- Oktem, Abdullah & Simsek, Mehmet & Oktem, A. Gulgun, 2003. "Deficit irrigation effects on sweet corn (Zea mays saccharata Sturt) with drip irrigation system in a semi-arid region: I. Water-yield relationship," Agricultural Water Management, Elsevier, vol. 61(1), pages 63-74, June.
- Cabelguenne, M. & Debaeke, Ph. & Puech, J. & Bosc, N., 1997. "Real time irrigation management using the EPIC-PHASE model and weather forecasts," Agricultural Water Management, Elsevier, vol. 32(3), pages 227-238, March.
- Ma, L. & Hoogenboom, G. & Ahuja, L.R. & Ascough II, J.C. & Saseendran, S.A., 2006. "Evaluation of the RZWQM-CERES-Maize hybrid model for maize production," Agricultural Systems, Elsevier, vol. 87(3), pages 274-295, March.
- Jalota, S.K. & Sood, Anil & Chahal, G.B.S. & Choudhury, B.U., 2006. "Crop water productivity of cotton (Gossypium hirsutum L.)-wheat (Triticum aestivum L.) system as influenced by deficit irrigation, soil texture and precipitation," Agricultural Water Management, Elsevier, vol. 84(1-2), pages 137-146, July.
- Cetin, O. & Bilgel, L., 2002. "Effects of different irrigation methods on shedding and yield of cotton," Agricultural Water Management, Elsevier, vol. 54(1), pages 1-15, March.
- Heinemann, A. B. & Hoogenboom, G. & de Faria, R. T., 2002. "Determination of spatial water requirements at county and regional levels using crop models and GIS: An example for the State of Parana, Brazil," Agricultural Water Management, Elsevier, vol. 52(3), pages 177-196, January.
- Guerra, L.C. & Garcia y Garcia, A. & Hook, J.E. & Harrison, K.A. & Thomas, D.L. & Stooksbury, D.E. & Hoogenboom, G., 2007. "Irrigation water use estimates based on crop simulation models and kriging," Agricultural Water Management, Elsevier, vol. 89(3), pages 199-207, May.
- Kiniry, James R. & Major, D. J. & Izarralde, R. C. & Williams, J. R. & Gassman, Philip W. & Morrison, M. & Bergentine, R. & Zentner, R. P., 1995. "Epic Model Parameters for Cereal, Oilseed, and Forage Crops in the Northern Great Plains Region," Staff General Research Papers Archive 894, Iowa State University, Department of Economics.
- Cabelguenne, M. & Jones, C. A. & Marty, J. R. & Dyke, P. T. & Williams, J. R., 1990. "Calibration and validation of EPIC for crop rotations in southern France," Agricultural Systems, Elsevier, vol. 33(2), pages 153-171.
- Minacapilli, M. & Iovino, M. & D'Urso, G., 2008. "A distributed agro-hydrological model for irrigation water demand assessment," Agricultural Water Management, Elsevier, vol. 95(2), pages 123-132, February.
When requesting a correction, please mention this item's handle: RePEc:eee:agiwat:v:96:y:2009:i:9:p:1323-1331. See general information about how to correct material in RePEc.
For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: (Shamier, Wendy)
If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.
If references are entirely missing, you can add them using this form.
If the full references list an item that is present in RePEc, but the system did not link to it, you can help with this form.
If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your profile, as there may be some citations waiting for confirmation.
Please note that corrections may take a couple of weeks to filter through the various RePEc services.