Straw, a byproduct left after the grain harvest, is yellow or golden. Straw is not typically used in livestock feed because it lacks nutrition, especially if it is dry. Farmers produce straw by cutting and forming hollow stocks. Though straw is not really nutritious for animals, it does make light and fluffy bedding. Also, farmers use the product for mulch because it keeps the soil moist, preventing the top layer from getting dry. The straw also acts as a weed crusher and it will compost over time.