I found some critical sources referring to this. Mel D. ( has 2013 revised article ). M. Bush and finski ( http://forum.beemaster.com/index.php?topic=27350.0;wap2
It seems that swarming may be a problem and needs additional actions.
By the way, more honey production in Kilograms is not my first thought. i am searching for methods other than standard because of specific reason. I try to change the proportions of the total honey gathered at a specific period because there is a spring source of nectar, so bitter, that no one wants to eat it. On the other hand after the bitter source ( arbutus ) there are wonderful aromatic sources such as species of thyme, oregano, mint, tea ( same area ) and i want to get more from them in the jars. Brood will keep up consumption of the bitter source and while the absence of brood will stop consumption during the aromatic sources. This honey smell is awesome.
There is a thin red line ( quality ) among the nectar sources. Me and my 20 queens will play with the line this year.