Digging corms acts as a form of tillage, which will increase the size of the gathering tract, aerate the soil, lower weed competition, and prepare the seedbed to increase seed germination rates.
dˈɪɡɪŋ kˈɔːɹmz ˈækts æz ɐ fˈɔːɹm ʌv tˈɪlɪdʒ, wˌɪtʃ wɪl ɪŋkɹˈiːs ðə sˈaɪz ʌvðə ɡˈæðɚɹɪŋ tɹˈækt, ɛɹˈeɪt ðə sˈɔɪl, lˈoʊɚ wˈiːd kˌɑːmpətˈɪʃən, ænd pɹɪpˈɛɹ ðə sˈiːdbɛd tʊ ɪŋkɹˈiːs sˈiːd dʒˌɜːmᵻnˈeɪʃən ɹˈeɪts.