Chapter 6
Mango and Longan Production in Northern
Thailand: The Role of Water Saving Irrigation
and Water Stress Monitoring
Wolfram Spreer, Katrin Schulze, Somchai Ongprasert,
Winai Wiriya-Alongkorn, and Joachim Mu ¨ ller
Abbreviations
CWSI Crop water stress index
DI
Deficit irrigation
ET
Evapotranspiration
ET C
Potential crop evapotranspiration
ET 0
Reference evapotranspiration
k c
Crop coefficient
k e
Evaporation coefficient
PRD
Partial root-zone drying
RDI
Regulated deficit irrigation
RH
Relative humidity of the air
T
Temperature
T a
Air temperature
T amax Daily maximum air temperature
T amin
Daily minimum air temperature
T C
Canopy temperature
W. Spreer • K. Schulze (*) • J. Mu ¨ller
Department of Agricultural Engineering in the Tropics and Subtropics (440e), University of
Hohenheim, Stuttgart, Germany
e-mail: katrin.schulze@uni-hohenheim.de
S. Ongprasert
Department of Soil Resources and Environment, Mae Jo University, Chiang Mai, Thailand
W. Wiriya-Alongkorn
Department of Plant Science and Natural Resources, Chiang Mai University, Chiang Mai,
Thailand
H.L. Fro ¨hlich et al. (eds.), Sustainable Land Use and Rural Development in Southeast
Asia: Innovations and Policies for Mountainous Areas, Springer Environmental
Science and Engineering, DOI 10.1007/978-3-642-33377-4_6,
# The Author(s) 2013
215
Mango and Longan Production in Northern
Thailand: The Role of Water Saving Irrigation
and Water Stress Monitoring
Wolfram Spreer, Katrin Schulze, Somchai Ongprasert,
Winai Wiriya-Alongkorn, and Joachim Mu ¨ ller
Abbreviations
CWSI Crop water stress index
DI
Deficit irrigation
ET
Evapotranspiration
ET C
Potential crop evapotranspiration
ET 0
Reference evapotranspiration
k c
Crop coefficient
k e
Evaporation coefficient
PRD
Partial root-zone drying
RDI
Regulated deficit irrigation
RH
Relative humidity of the air
T
Temperature
T a
Air temperature
T amax Daily maximum air temperature
T amin
Daily minimum air temperature
T C
Canopy temperature
W. Spreer • K. Schulze (*) • J. Mu ¨ller
Department of Agricultural Engineering in the Tropics and Subtropics (440e), University of
Hohenheim, Stuttgart, Germany
e-mail: katrin.schulze@uni-hohenheim.de
S. Ongprasert
Department of Soil Resources and Environment, Mae Jo University, Chiang Mai, Thailand
W. Wiriya-Alongkorn
Department of Plant Science and Natural Resources, Chiang Mai University, Chiang Mai,
Thailand
H.L. Fro ¨hlich et al. (eds.), Sustainable Land Use and Rural Development in Southeast
Asia: Innovations and Policies for Mountainous Areas, Springer Environmental
Science and Engineering, DOI 10.1007/978-3-642-33377-4_6,
# The Author(s) 2013
215