Home » Turfgrass Physiology; Diffusion & Osmosis,

Turfgrass Physiology; Diffusion & Osmosis,

In nature, it is often said that things will tend towards chaos and this is described by a mechanism known as Entropy. In one of his recent TV programs, Professor Brian Cox demonstrated this using a sand castle as his example. Simply put, Entropy says that due to natural movement by wind and weather, sand is highly unlikely to form itself into a sand castle. However, a sand castle is highly likely to be converted to a pile of sand. This is Entropy in action and it seems to say that nature prefers chaos to order; but, whose description of “order” are we using for this?

What if nature was viewing the sand castle as chaos and was instead trying to make order of it by turning it back into a nondescript (as far as we are concerned) pile of sand?

The fact is, that instead of chaos:

Natural systems will tend towards equilibrium.

A common example of this tendency towards equilibrium is the wind we feel on our faces every day. Wind is caused by uneven warming of the earth’s surface. Where one area is warmed more directly, the air above it will rise. This creates a space for cool air. When that cool air rushes in to fill the void, we feel it as wind.

So, although these processes might look like chaos to us (when our sand castle is ruined), it’s really the opposite to chaos that’s happening:

Natural systems will tend towards equilibrium.

This is the way of nature and it informs and drives a lot of what goes on in and around the grass plants on the bowling green.

Today, we will look at two mechanisms of turfgrass physiology that active in our grass plants and soil and that follow this tendency towards equilibrium, without which our turf wouldn’t be able to grow and thrive.

Diffusion

The first of these mechanisms is called Diffusion which is a term you will find throughout science. In broad scientific terms Diffusion explains the process through which molecules mix as a result of their energy and random motion.

In more simple terms related directly to the management of bowling greens, we see Diffusion in three distinct plant growth processes. We can think of it as a process that makes molecules

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