'stalks of corn'(Modern English rissom)
Always identified with the MnE dial word rissom. The closest comparanda are Scandinavian derivational forms on the PGmc root *xrīs- 'brushwood' with a nasal suffix, which is unparalleled elsewhere (cp. OIcel hrís, OE hrīs 'twig, branch', OFris hrīs 'switch, rod', MLG rīs 'twig, branch', OHG hrīs, rīs), cp. Sw dial resma, resme 'ear of oats' and, with different vocalism, Dan rusme, rosme 'head of oats' (see further Torp-Falk and note the less common MnE variant ruzzom cited by OED3 and EDD from Yks.).
Proposed ON Etymon (OIcel representative)
Other Scandinavian Reflexes
Sw dial resma, resme; cp. Dan rusme, rosme
Phonological and morphological markers
This is the only ME instance of the word, which is otherwise cited by OED3 and EDD from N dial of MnE.
Occurrences in the Gersum Corpus
Skeat WA reads <risonis>, but notes that <risoms> is also possible.