Science 9

Two studies were conducted to investigate the quality of various potting soils.

Study 1

Samples of three different potting soil mixtures (A-C) were tested. Each was analyzed for fertilizer content and dry particle content. The results are shown in Table 1.

Plants are often plagued by various fungi. Study 2 investigates the resistance to fungal growth in each of the soils.

Another sample of each potting soil was saturated with water and left undisturbed for several days. One set was exposed to sunlight, the other was kept in a cool, dark room. Fungal growth was noted and recorded in Table 2.