In this farm scale trial at Wongan Hills, a lined combine was used to seed lupins into rows spaced 380 mm apart in wheat stubble.
"Wider spaced rows for lupins,"
Journal of the Department of Agriculture, Western Australia, Series 4: Vol. 33
, Article 5.
Available at: http://researchlibrary.agric.wa.gov.au/journal_agriculture4/vol33/iss1/5