然后又盖上一层雪。有人说雪是穷人的肥料 (poor man's fertilizer),有助菜苗生长。(“Poor man’s fertilizer” is what the old Yankees called snow and there is considerable truth to that expression. Snowflakes as they form and fall absorb nitrates from the atmosphere and then release these nutrients into the soil as the snow melts. http://gardenrant.com/2015/02/poor-mans-fertilizer.html)
然后又盖上一层雪。有人说雪是穷人的肥料 (poor man's fertilizer),有助菜苗生长。(“Poor man’s fertilizer” is what the old Yankees called snow and there is considerable truth to that expression. Snowflakes as they form and fall absorb nitrates from the atmosphere and then release these nutrients into the soil as the snow melts. http://gardenrant.com/2015/02/poor-mans-fertilizer.html)