How to keep the freshness of vegetables without keeping them in fridge

Actually this is about some method using which you can store your vegetables and keep them for a very long time.

The method is as follows.

Take a pot and pour some sand in it. try to add some water in the sand. If you can try to arrange a way some thing like drip irrigation methodology to pour drop of water every minute approximately.

Now take another small pot and place it inside the big pot and put vegetables in it and forget it.

Even if you open the pot after a weeks time you can feel that your vegetables are fresh then they used to be if they were kept for same time in fridge. Hope this might help some one without fridge.