Rice Husk Rice husk are one of the most sustainable soil amendments available for improving drainage, water holding capacity and aeration. Unlike perlite and other rock products, it does not require mining; unlike peat moss it does not require land disruption to produce it. For your garden soil, spread about a two" layer across the surface when you fertilize in the spring, and mix it into the top 6–12" of soil. For potted plants, you should mix 10–50% rice hulls into the potting soil. Rice hulls are extremely lightweight, so they’re especially ideal for rooftop gardening or other gardens that require an amendment to make your soil lighter. You can use rice hulls as a mulch for your bedding, similar to how you would use straw. Rice Husk can be used for cat litter , bio char for soil enrichment , pest repellent , fuel for heating stoves , composting.   Powder form of husk can be used to feed cattles.