Keep in mind here that many soil growers don't use a lot of liquid nutrients at all during their grow. Some don't use any at all. Many soil organics growers pack their soils with most of what their plants are going to need during the growth period (supersoils, anyone?). Many top dress periodically (every few weeks or so), and/or brew organic teas for one or more reasons.
So, when you are growing organically in soil you really aren't 'starving' the plant by giving it water (with minimal liquid fertilizers/supplements) for a couple weeks or more. That is pretty much what a lot of organics growers are doing throughout much of their grow anyways. We are feeding the soil, really. You can feed the soil, and the soil will sustain the plant for some time.
Humus and other soil particles hold onto nutrient ions (which originate from decomposition of organic matter). They are also trapped up (immobilized) in the cells of microbes and the bodies of other organisms until they are released (mineralized) when the organism dies or is consumed. The plants are exuding substances such as carbohydrates in order to attract these microbes into the rhizosphere (where nutrients are absorbed), and the microbial activity will result in the production of plant available nutrients.
With sufficient organic matter and healthy microbial populations (two of the things that teas provide) you should easily be able to water for two weeks without starving anything.