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According to White (2009) the rhizosphere is the "immediate vicinity of plant roots" (pg.162).

White, R.E (2009). Understanding vineyard soils. New York, New York; Oxford university press.

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This soil sample was collected from our vineyard in the Southern Valleys, Marlborough.
Soil was dug from around 30cm deep. There was a change in soil texture as it changed from soft soil into a hard, clay like layer, the soil sample was taken from the hard clay like layer.
Soil was sieved to remove gravel sized pieces, the remaining was put into a jar, water was added to the top, and the jar was shaken for five minutes. It was all one colour, but I expect this to separate into three layers as the sand silt and clay divide. Our vineyard has been known as clay hill, so it will be interesting to see how much clay is in the soil.

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Soil collected from SugarLoaf vineyard at Sauvignon Blanc block.

Soil dug from approximate 30cm. Collected soil was sieved to remove any stones and breakdown the soil. Soil was than separated into 3 different jar. Water was added to each jar and was shook for about 5-10minutes each.

Sub soil during digging was dark maroon in colour. It was easy to dig. In this initial picture taken, there is a clear separation with clay layer formed at the top.

Next Observation: I predict there would be a more clearer separation seen in the solution. I am also looking at getting a better separation between the clay layer as well. This would be interesting and I am looking forward to the observation.

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Here is my heterogenous soil solution taken from my backyard. After shaking for about 4 minutes and setting the jar down I could see quite a lot of sparkles as what you see in the Kawarau river, which could possibly be silt. I do predict there will be a pretty sufficient amount of clay starting to pile up next time based on how it stuck to my hand in clumps as I was sieving it.