"10551","15","archive","1305",,,"disk0/00/01/05/51","2018-04-10 10:16:59","2018-04-10 10:20:59","2018-04-10 10:16:59","article",,,"show",,,,"","","","","","","","","","",,,,"Whitbread","A M","","","","","","","Whitbread","A M","","","","",,,,,"","",,,,,"","","ICRISAT (Patancheru)","India","Measuring And Modelling The Water Balance Of Low Rainfall Cropping Systems","pub","CL1","CRPS4","crp1.11","restricted",,,"APSIM, Climate risk management, Crop models, Decision support, Soil moisture, Agricultural Production Systems SIMulator, Climate risk, APSIM model, Cropping systems",,"Submitted for review in August 2017 as manuscript number NRES
12581; approved for publication as part of the “Crop Modeling and Decision
Support for Optimizing Use of Limited Water” collection by the Natural
Resources & Environmental Systems Community of ASABE in October
2017. We thank Mallee Sustainable Farming, Inc., and collaborating
farmers Allen Buckley and Jim Maynard for their assistance
and the Grain Research and Development Corporation
for financial support. In particular, Dr. V. V. S. R. Gupta
and the late David Roget are acknowledged for their pivotal
roles in initiating the long-term trials described in this article.
Dr. Ben Jones of Mallee Focus is acknowledged for database
compilation of the trial management information and results.
The staff time of A. M. Whitbread has been funded through
the CGIAR Research Program on Water, Land, and Ecosystems
(WLE) and the CGIAR Research Program on Climate
Change, Agriculture, and Food Security (CCAFS).","In low-rainfall cropping systems, understanding the water balance, and in particular the storage of soil water
in the rooting zone for use by crops, is considered critical for devising risk management strategies for grain-based farming.
Crop-soil modeling remains a cost-effective option for understanding the interactions between rainfall, soil, and crop
growth, from which management options can be derived. The objective of this study was to assess the error in the prediction
of soil water content at key decision points in the season against continuous, multi-layer soil water measurements made
with frequency domain reflectometry (FDR) probes in long-term experiments in the Mallee region of South Australia and
New South Wales. Field estimates of the crop lower limit or drained upper limit were found to be more reliable than laboratory-
based estimates, despite the fact that plant-available water capacity (PAWC) did not substantially differ between the
methods. Using the Agricultural Production Systems sIMulator (APSIM) to simulate plant-available water over three-year
rotations, predicted soil water was within 7 mm (PAWC 64 to 99 mm) of the measured data across all sowing events and
rotations. Simulated (n = 46) wheat grain production resulted in a root mean square error (RMSE) of 492 kg ha-1, which is
only marginally smaller than that of other field studies that derived soil water limits with less detailed methods. This study
shows that using field-derived data of soil water limits and soil-specific settings for parameterization of other properties
that determine soil evaporation and water redistribution enables APSIM to be widely applied for managing climate risk in
low-rainfall environments.","2017","published",,"Transactions of the ASABE","60","6","ASABE",,"2097-2110",,,,,,"10.13031/trans.12581",,,,,"TRUE",,"2151-0032",,,,,,"","https://doi.org/10.13031/trans.12581","http://elibrary.asabe.org/abstract.asp?AID=48679&t=3&dabs=Y&redir=&redirType=","org",,"","",,,,,,"",,,,,,,"",,,,,"",,,,,"","",,,,,"","",,,,,
"10551",,,,,,,,,,,,,,,,,,,,,,,,,,,,,,"Hoffmann","M P","","",,,,,,,,,,,,,,,,,,,,,,,"CSIRO Agriculture and Food, Waite Campus (Glen Osmond)","Australia",,,"n345",,"crp1.13",,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
"10551",,,,,,,,,,,,,,,,,,,,,,,,,,,,,,"Davoren","C W","","",,,,,,,,,,,,,,,,,,,,,,,"Tropical Plant Production and Agricultural Systems Modeling (TROPAGS), Georg-August-Universität (Göttingen)","Germany",,,"s2.11",,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
"10551",,,,,,,,,,,,,,,,,,,,,,,,,,,,,,"Mowat","D","","",,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
"10551",,,,,,,,,,,,,,,,,,,,,,,,,,,,,,"Baldock","J A","","",,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,