Drying green crops aims to preserve the nutritious content so that they can be used at any time. Well processed hay retains the green color of grass, so it is called green hay. Hay is regarded as the processed products of green crop, as well as stores to preserve the nutrition of grass. They are totally different from crop straw. In terms of the nutrition value, inferior hay is less nourishing than straw, but superior hay has equal nutrition content as wheat bran.

Hay is popular in husbandry and agriculture owing to its low cost, lighter weight and abundant sources. Meanwhile, hay is easier for animals to digest, and reduce the stress on digestive tract. Processing grass into hay contribute to long-term preservation and market circulation, and relieve the disparity of grass supply in different seasons. Hay is usually made by sun-curing and artificial drying. Easy processing technology makes it the most common way to preserve feed grass.

Hay is the most residuum in agriculture and forestry. You can gather it on your farm or purchase it at low price. It is much cheaper than fossil fuels. All you need is a hay pellet mill and auxiliary equipments like hammer mill.

Hay pellets are green energy. Their greenhouse gases emission is 90% less than fossil fuels like coal and gas, a quantity 10 times under the EPA emission standard. Adopting biomass fuel is a way to meet environmental requirement.

The heat value of hay pellets reaches up to 8000 BTU, which is comparable to hard wood, and comes near that of fossil fuel. Besides, hay pellets has nice energy output ratio, up to 20:1, while wood is 10:1, and biodiesel is 5:1.

As we know, hay pellets are excellent animal feed and economical biomass energy. They can be used as mulch and soil conditioner in farmland and garden. By absorbing water they can expand to 4 times their original size.