Make improvements on the following paper by creating an introduction. Start the introduction by describing the soybean crop and its varieties, its growth conditions and effects of any environmental conditions on it. Next describe its importance as a crop in the US and worldwide. Then, move on to its life cycle, including its growth conditions and effects, say under different photoperiodic conditions. Then you could finally start with the flowering transition in plants in general and in soybean in specific later on, discuss about the flowering networks and the genes involved in it along with the roles they play.