Show SNOW RAIN ottawa ottawa Ottaw canada ground theory among snow snow beautiful snow sky earth below winter deter mice pound per acre land average winter snowfall district amount nitrogen free ammonia am falls fit fit sit fit sit bit ottawa canada slight opinion among snow direct direct found contain nitrogen equivalent round per million nitrogen million jr nitrogen ana ana ani Al per million average 12 february 21 1907 nitrogen tree tree free ammonia ammonia part per million continue 2 snow rain box |