Dwiddly

My notes and musings …

And they grow taller and taller …

leave a comment »

Millets are amazing. Most people would have seen sorghum and pearl millet in the fields growing to more than 8′ in height, and among traditional varieties, 10′ is totally the norm. Some might have noticed how these amazing plants put secondary roots from their collar nodes to support themselves as they grow.

On reaching reproductive stage, the grain filled panicle at the apex of the plant can easily weigh about 300 gms. So, one can approximate the plant to a cylinder with about 2″ to 3″ diameter and a height of 120″, held at one end, with a 300 gm weight at the free end. So its not really surprising that purely from a physical dynamics perspective they put down secondary roots from not just one, or two but even three nodes as seen in this image below. I am sure I am not alone in seeing the many beautiful math and physics concepts that one can explain, demonstrate and possible experiment with in this amazing natural wonder.

Secondary roots in traditional of Sorghum (సీతమ్మ జొన్న)

Secondary roots of a traditional bi-color variety of Sorghum (సీతమ్మ జొన్న) as seen in a farm in Mandavarapalli, Chittoor Dt., AP. on Oct 19th, 2015.

Dinesh (Earth 360) demonstrating the height of a traditional bi-color variety of Sorghum (సీతమ్మ జొన్న) in a farm in Mandavarapalli, Chittoor Dt., AP. on Oct 19th, 2015.

Dinesh (Earth 360) helping us  estimate the height of the plant whose roots we seen in the image above. (In Mandavarapalli, Chittoor Dt., AP. on Oct 19th, 2015)

And then there is the physiology of the structures. More on that in a later post.

Advertisements

Written by Dwiji

Thursday, October 22nd, 2015 at 06:11

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s

%d bloggers like this: