2017-01-272017-01-271892-05Fertilizers. Improvement of timothy. Rape in Minnesota. Peas and oats. Field peas. 1892. Saint Paul, Minn.: University of Minnesota. Agricultural Experiment Station. Bulletin 20, page 33-64https://hdl.handle.net/11299/183759This archival publication may not reflect current scientific knowledge or recommendations. Current information available from University of Minnesota Agricultural Experiment Station: http://www.maes.umn.edu/enNewsletter or Bulletin