[Gasification] [Digestion] Cattails

[Mark Ludlow]

Richard,

Can you please describe what (if any) kind of equipment is available for
harvesting starchy tubers that have a minimal impact on benthic ecosystems?
Can they be pulled free by their stalks? How would they be regenerated? Do
any of the species you mention host denitrifying or nitrogen-fixing
bacteria?

Thanks for any additional, practical insights that you can provide.

Mark

-----Original Message-----
From: gasification-bounces at listserv.repp.org
[mailto:gasification-bounces at listserv.repp.org] On Behalf Of Richard Haard
Sent: Friday, December 21, 2007 11:27 AM
To: Discussion of biomass pyrolysis and gasification
Subject: Re: [Gasification] [Digestion] Cattails

I am familiar with this plant we call it bulrush and our species is  
Scirpus acutus. It grows quite nicely at our farm and it turns out  
water requirements is because of competitive factors and not a  
physiological requirement of the plant, in both typha and scirpus.

The typha though is especially interesting because of the starch rich  
roots that are found in some seasons on this plant. Other starchy root  
aquatic habitat plants have potential such as Wapato, Arrow root or  
duck potato which offers a large starchy root that has been harvested  
as a source of food starch. This plant though requires aquatic habitat  
to grow.

http://plants.usda.gov/java/profile?symbol=SALA2

Rich
On Dec 21, 2007, at 4:53 AM, Benjamin Domingo Bof wrote:

> Richard ; very good video . For me this is the way cheapest vegetals  
> to use as energy. Scirpus Californicus named "totora" in our regions  
> could be other source of cellulosic material. Here more info:
>  http://www.peruecologico.com.pe/flo_totora_2.htm
>
> Richard Haard <richrd at nas.com> escribió:
>  Hmmm
>
> The link did not seem to come through
>
> try again
>
> http://www.youtube.com/watch?v=Ybhz-TBrjZs
>
>
> On Dec 20, 2007, at 9:44 PM, Richard Haard wrote:
>
>> Hi Harmon
>>
>> Here is a Youtube link to view our use of the lifter-shaker for bare
>> root harvest an alternate tool to harvest cat-tails , a plant we now
>> cultivate and harvest at our native plant nursery.
>>
>> Rich
>> On Dec 20, 2007, at 6:50 PM, Harmon Seaver wrote:
>>
>>>
>>>> Even if there were, it would be
>>>> difficult to adapt them to modern, mechanised, farming techniques.
>>>
>>> Actually it is quite simple. You grow them in paddys, as you do
>>> rice.
>>> The water level is managed, and when harvesting, you drain the  
>>> paddy,
>>> run first one tractor (with tracks or the huge mud tires) with a
>>> mower
>>> or harvester that cuts off the stalks 3' above the ground, then a
>>> second
>>> tractor following that cuts the stalks at ground level.
>>> Dr. Pratt's group also experimented with harvesting the roots with
>>> modified potato diggers which seemed to work well.
>>
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