Question

uses of straw and it's utility

Answer 1

Animal feed
Straw may be fed as part of the roughage component of the diet to cattle or horses that are on a near maintenance level of energy requirement. It has a low digestible energy and nutrient content (as opposed to hay, which is much more nutritious). The heat generated when microorganisms in a herbivore's gut digest straw can be useful in maintaining body temperature in cold climates. Due to the risk of impaction and its poor nutrient profile, it should always be restricted to part of the diet. It may be fed as it is, or chopped into short lengths, known as chaff.
Basketry
Bee skeps and linen baskets are made from coiled and bound together continuous lengths of straw. The technique is known as lip work.
Bedding: humans or livestock
The straw-filled mattress, also known as a palliasse, is still used in many parts of the world.
It is commonly used as bedding for ruminants and horses. It may be used as bedding and food for small animals, but this often leads to injuries to mouth, nose and eyes as straw is quite sharp.
Biofuels
The use of straw as a carbon-neutral energy source is increasing rapidly, especially for biobutanol. Straw or hay briquettes are a biofuel substitute to coal.
Biogas
Straw, processed first as briquettes, has been fed into a biogas plant in Aarhus University, Denmark, in a test to see if higher gas yields could be attained.[1]
Biomass
The use of straw in large-scale biomass power plants is becoming mainstream in the EU, with several facilities already online. The straw is either used directly in the form of bales, or densified into pellets which allows for the feedstock to be transported over longer distances. Finally, torrefaction of straw with pelletisation is gaining attention, because it increases the energy density of the resource, making it possible to transport it still further. This processing step also makes storage much easier, because torrefied straw pellets are hydrophobic. Torrefied straw in the form of pellets can be directly co-fired with coal or natural gas at very high rates and make use of the processing infrastructures at existing coal and gas plants. Because the torrefied straw pellets have superior structural, chemical and combustion properties to coal, they can replace all coal and turn a coal plant into an entirely biomass-fed power station. First generation pellets are limited to a co-firing rate of 15% in modern IGCC plants.
Construction material:
In many parts of the world, straw is used to bind clay and concrete. A mixture of clay and straw, known as cob, can be used as a building material. There are many recipes for making cob.
When baled, straw has moderate insulation characteristics (about R-1.5/inch according to Oak Ridge National Lab and Forest Product Lab testing). It can be used, alone or in a post-and-beam construction, to build straw bale houses. When bales are used to build or insulate buildings, the straw bales are commonly finished with earthen plaster. The plastered walls provide some thermal mass, compressive and ductile structural strength, and acceptable fire resistance as well as thermal resistance (insulation), somewhat in excess of North American building code. Straw is an abundant agricultural waste product, and requires little energy to bale and transport for construction. For these reasons, straw bale construction is gaining popularity as part of passive solar and other renewable energy projects.[2]
Composite lumber Wheat straw can be used as a polymer filler combined with polymers to produce composite lumber.[3]
Enviroboard can be made from straw.
Strawblocks
Crafts

Belarusian Straw Dolls

Easter bunny made of Straw
Corn dollies
Straw marquetry
Straw painting
Straw plaiting
Scarecrows
Japanese Traditional Cat's House
Erosion control
Straw bales are sometimes used for sediment control at construction sites.[4] However, bales are often ineffective in protecting water quality and are maintenance-intensive. For these reasons the U.S. Environmental Protect

Answer 2

Straw is one of the most important byproducts which is produced due to the agricultural activities.

Straw is actually dried stalks of different grains.

There are many uses of the straw;

1) food of the cattle animals.

2) roofing substance of the houses in the rural area.

3) substance for weaving and fencing.

4)it is also used as a fuel source.