When considering the optimal duration for operating drip irrigation systems, what factors should one take into account to ensure that the plants receive adequate hydration without overwatering? Is it essential to factor in elements such as soil type, plant species, and current weather conditions? Moreover, could the time of day influence the efficiency of water absorption? For instance, should the irrigation duration vary between the early morning and the late afternoon? How do seasonal variations play a role in determining the precise run times? Additionally, can one establish a general guideline for typical scenarios, or is it necessary to adjust individual schedules based on the unique needs of different plants? As one contemplates these queries, how might the integration of soil moisture sensors enhance decision-making in regard to drip irrigation runtimes? Would a careful balance of empirical observation coupled with scientific principles yield the most successful outcomes for both plant health and water conservation?