Of all the building systems outlined at enhomebuilding.com, 
cast earth is one of the most difficult to become involved 
with; it is proprietary in the US and requires training 
with a crew and heavy equipment. Many of the other earthen 
techniques, such as adobe, cob, rammed earth,  and 
eyarthbags are much simpler and more direct to employ.

Need some insulation in the shell of your home to be 
comfortable in that climate, and rocks and soil will not 
provide that. It is possible to make a double wall with 
stones, so that insulation can be created in the hollow 
space, but this is a lot of work. Also, earthen materials 
can be insulated (ideally on the outside) with synthetic 
insulation, and then plastered. More natural insulation 
materials that you might find are: strawbales, rice hulls 
(placed in earthbags), crushed volcanic rock (placed in 
earthbags). Most likely some sort of hybrid structure 
utilizing a variety of materials will work best .

particularly examine cordwood construction, since it is 
fairly easy to do, can utilize some of the wood from your 
forest, and creates a well-insulated wall that is very easy 
to maintain.

Earth building is especially appropriate for many places 
where other forms of building would be impossible or too 
costly. This is especially true of the use of adobe, 
earthbags, rammed earth, cob, etc. As for the earthship 
concept that uses lots of used tires and cemented aluminum 
cans, etc., this may not be as appropriate, because these 
materials may not be so available. It really depends on 
what can be found in the area where the house it is to 
built.

From an ecological standpoint, natural materials have the 
advantage that they generally don't require much energy to 
manufacture or even transport them. This savings in energy 
will likely diminish the amount of greenhouse gas (CO2) 
that is emitted and also the amount of fossil fuel 
consumed. From an aesthetic/emotional standpoint, natural 
materials feel much more, well, natural. Technology is 
always behind the scenes in our modern world, and I am not 
one to spurn its use when appropriate. I just feel that one 
should look to the simpler, natural solutions first, before 
employing more technological ones.

the benefits of using natural materials and technology fit 
in the atmosphere..........

Any time materials and techniques are used that reduce the 
embodied energy that goes into a house, there is a like 
reduction of greenhouse gas emissions and less consumption 
of un-renewable fuels.

From an environmental standpoint cement has a negative 
impact, because manufacturing it emits about a ton of 
greenhouse gas (CO2) into the atmosphere for every ton of 
cement manufactured. Then you need to add the use of fuel 
and emissions in transporting the heavy cement from the 
factory to wherever it is used. Cement is also a rather 
cold, unyeilding material to live in.

Green architecture might mean different things to different 
people. I use the term to include all aspects of 
architectural design and construction that enhance 
sustainable, healthy living. This might simply relate to 
choosing materials that do not offgas toxic chemicals, or 
it might relate to significant building designs that 
naturally capture and reuse all of the water and energy 
that is required for comfortable living within.

This type of soil has enough binder in it to form earth 
blocks,Certainly will be good bag filling material. Also 
good for plastering.

Postmodern architecture, well there is a huge amount of 
this literature in any architectural section of a library, 
and one architect that springs to mind is John Outram 
(Ilionas father) who was known for this, also Jim Sterling.

If you want to specialize in vernacular architecture after 
graduation there are a few places where you can do a 
masters course with the vernacular element as part of the 
course, and Oxford Brookes University in England is one 
school of architecture where you can do this. In fact its 
the best for this course. I am afraid I dont know in which 
universities in India you can do a masters with this 
element as a formal part of the course, but generally most 
schools of architecture ar equite flexible and allow you to 
specialise in whatever aspect of architecture you want to 
specialise in. If this is not the case in India, you will 
need to research as to which school gives you the freedom 
to do this. The other route is to do the studies in a 
conventional way and then specialise afterwards.