Determination of evapotranspiration and crop coefficients of rice and sunflower with lysimeter

By N. Tyagi, S. K. Luthra. 2000

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Use of thermal units to estimate corn crop coefficients under semiarid climatic conditions (2008, background): “…have been proposed over the last years to estimate Kc curves for annual crops as a function of time in terms of days after sowing (DAS) or month of the year (Wright 1982, 1991; Devitt et al. 1992; Steele et al. 1996; Nielsen and Hinkle 1996; Tyagi et al. 2000a, b, 2003; Sepaskhah and Andam 2001).”
Evaluation of CropSyst for simulating the yield of flooded rice in northern Italy (2005, result): “The value for the ET crop coefficient at full canopy (1.05) is in agreement with the values reported by FAO (1998) and by Tyagi et al. (2000) .”
A consolidated evaluation of the FAO-56 dual crop coefficient approach using the lysimeter data in the North China Plain (2010, methodology): “Although there are some reports on the errors of the DCC method in estimating the ETc for cotton (Hunsaker, 1999; Allen, 2000; Howell et al., 2002), rice (Tolk and Howell, 2000), sunflower (Tyagi et al., 2000) and alfalfa (Hunsaker et al., 2002).”
Simulation of salt and water movement and estimation of water productivity of rice crop irrigated with saline water (2010, background): “About 75% of the global rice volume is produced in the irrigated low lands (Cantrell 2004) and it consumes 42% of available water supply in India ( Tyagi et al. 2000 ).”