19, 4 
Reinking and Groff: Siamese Seedless Pummelo 393 
Fia. 1. Location of the pummelo orchards at Ban Mai on Taehin Rivet ; scale about 1 to 
530,000. 
Some of the plantations are situated on the banks of the river, 
the trees being planted about 7 to 10 meters from the river bank 
and separated from the river by a dike. During June at high 
tide the water rises to within 30 centimeters of the top of the 
dike ; at low tide it sinks to about 2 or 2.5 meters below the top 
of the dike. Water for irrigation is taken directly from the river 
in such cases. Other plantings may be situated farther from the 
river, those studied being some 100 to 150 meters removed. 
Taehin River was at one time a branch of the Menam Chao 
Phaya, but in recent years the source of the river has been 
almost entirely cut off from the main river. The severance 
of the connection, because of lack of a large supply of fresh 
