In a message dated 20/10/2010 13:37:15 GMT Daylight Time,  
[log in to unmask] writes:

I am  wondering about the relation betwen weather and  polen/nectar
production/secretion by the plants. 


Not only current weather needs to be considered but also past rainfall. If  
there is little moisture in the upper layer of soil, shallow-rooted plants 
may  have difficulty in producing optimum volumes of nectar but deep rooted 
plants  and trees may do better. 
 
Chris

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