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exists and is an alternate of . The correct term is Guano. It is the feces and urine of seabirds, cave-dwelling bats, and seals. Guano manure is a highly effective fertilizer due to its high phosphorus and nitrogen content and its relative lack of odor compared to other forms of organic fertilizer such as horse manure.
Little League, USSSA, and NSA use the Bat Performance Factor (or BPF) to regulate bat performance.The BPF involves the bat-ball coefficient of restitution or BBCOR. Its definition is similar to that used for the ball (Eq. 2.1). We take the ratio of the relative speed after impact to the relative speed before impact.