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Designer compost Wele ddffiniadau o wahanol fathau o gompost, o wefan yn UDA: "Fresh Compost: has undergone partial decomposition, but it is not stabilized and continues to breakdown. Mature Compost: generally suitable as an organic soil conditioner, but is only partially stabilized and may temporarily arrest plant growth if it comes in direct contact with the roots. Cured Compost: highly stabilized product, excellent organic soil conditioner. Class A: includes cured compost, suitable for lawn and garden application, referred to as designer compost. Class B: includes fresh and mature compost, used as an agronomic soil amendment."