The unicellular spores of the fern ceretopteris richardii are about 100 um in diameter. calculate the surface-area-to-volume ratio of a cube whose sides are 100 um in lenth to approximate the surface-area-to-volume ratio of the fern spore cell

1. loamy sand is about 80% sand with 10% clay and defined mostly by sand particles with some clay to provide structure and fertility. the sand particles are easily visible and the soil holds structure but breaks apart easily.

2. scott sand can improve his soil quality by incorporating more silt and organic matter into the soil. peat moss and organic matter can also be incorporated.