This collection is composed of articles and other materials written by N.E. Hansen, including writings for the South Dakota Experiment Station in the form of bulletins and circulars. Includes notebooks and field records of some South Dakota Experiment Stations and early ledgers of the South Dakota Horticultural Society, for which Hansen acted as secretary. Also included is material donated by Helen Hansen Loen, granddaughter of N.E. Hansen. This material is composed of addresses, clippings, correspondence, journals, Loen Research, manuscripts, notebooks, publications, and travel material. Most of this material belonged to N.E. Hansen with the remainder being material collected by Ms. Loen for her written histories of her grandfather.

SDSU Records

This series is composed of addresses, collected works, SDSC Horticulture Department materials, manuscripts, notebooks, publications, SD Agricultural Experiment Station materials, and photographs.

The addresses are speeches given by Hansen at the South Dakota State Conservation and Development and Dry Farming Congress in 1911 and the International Congress of Genetics in Berlin, Germany in 1927.

The collected works consists of material collected by Hansen and includes reports on forests, sheep and forage crops. Also included are items filed as general. This material includes biographies written about Hansen, one of which is written in Danish and some material related to recognition of Hansen in 1949.

The manuscripts consist of articles written by Hansen on the subjects of alfalfa and the fine arts. The notebooks include planting records and field plot notations detailing where alfalfa, clover, grasses and grains were planted. These notebooks are dated from 1888 to 1913. The photographs consist mainly of images from travels to Siberia and Northern China in 1924. Also included are images of apples, sheep, and Hansen with trees. The photographs were removed from the collection and placed in the UA Photograph Archives for preservation. Ask staff for assistance with these items.

The publications consist mainly of SD Agricultural Experiment Station bulletins written by Hansen. Also included are some creative works by Hansen, poems written for Hobo Day and a copy of The Yellow and Blue, the South Dakota State College school song for which Hansen wrote the words.

The South Dakota Agricultural Experiment Station material consists of field records for the Agronomy Department and cover mostly the Brookings experiment station, although a few have notes for the Highmore experiment station. This material is dated from 1915 to 1947.

The Horticulture Department material consists of ledgers, which contain records of individuals who joined the South Dakota Horticultural Society and a list of the free premiums they received, usually packets of seeds, and annual reports of the Society. Also included were miscellaneous items that were kept in the ledgers, which were removed and placed in a separate folder for conservation purposes. These ledgers are dates from 1908 to 1929.

The Plant Specimens were collected by Hansen on his travels as an agricultural explorer for the United States Department of Agriculture. He searched for hardy grasses, fruits, and other plants throughout Europe and Asia and brought them back to the United States to raise or crossbreed with American varieties to produce hardy plants. Each Specimen is mounted on an 11.5 x 16.5 inch herbarium sheet accompanied by a label printed in Russian in Cyrillic letter with hand-written notation in blank ink."

Loen Records

This series is composed of addresses, clippings, correspondence, journals, Loen Research, manuscripts, notebooks, publications, and travel material. The material is this series was collected by Helen Hansen Loen, granddaughter of N.E. Hansen. Most of the material belonged to N.E. Hansen with the remainder being material collected by Ms. Loen for her research.

The addresses are composed of speeches given by N.E. Hansen at various venues including the SD State Horticulture Society and the International Congress of Genetics in Berlin, Germany in 1927. This material is dates from 1905 to 1936.

The clippings consist of newspaper and magazine article clipping about N.E. Hansen. Topics include plant breeding, grapes, thornless roses, alfalfa, fruit, wheatgrass, and travels. Many of the articles are biographical.

The correspondence material is dated from 1873 to 1943. The bulk of this material is correspondence between N. E. Hansen and his father, Andreas. Also included is correspondence between family members, friends. and business associates Many of the letters, especially between Niels and his father, are in Danish. Ms. Loen had these letters translated. These translations are included with the original letters. Most of the material consists of original letters, envelopes (some of which are empty), translation transcripts, and notes by Helen Loen. Also included are postcards dated from 1913 from N.E. Hansen to his son Carl with Hansen traveled in Russia.

The journals were kept by N.E. Hansen and cover college and travel years. Included are loose notes, ephemera, financial statements, and business cards. Pressed leaves were found in the journal dates 1882-83. This material is dated between 1879 and 1922. The Loen Research material consists of material gathered by Helen Hansen Loen in compiling written histories of her grandfather, Niels Ebbesen Hansen. Included in this material is correspondence, genealogical research, N.E. Hansen biographical information; including his academic career at Iowa State College and his professional career at South Dakota State College.

The manuscripts consist mainly of original manuscripts written by N.E. Hansen. Included is an unpublished manuscript titled "Russia as Observed by an Agricultural Explorer," written between 1934 and 1937. This includes at least two copies of each page, some of which are handwritten, and some that are edited by cutting and taping. This material is arranged alphabetically by title. The unpublished manuscript "Russia as Observed by an Agricultural Explorer" is arranged by page number. This was done to allow researchers to see the evolution of Hansen's editing and to show the various topics covered by the manuscript.

The notebooks include miscellaneous notes on plants, a calendar of events, and course work while Hansen attended Iowa State College. This material is dated 1883 and 1908-1909.

The publications consist mainly of reprints of bulletins written for the SD Agricultural Experiment Station. Also included are reprints of other published articles and a copy of The Yellow and Blue, the South Dakota State College school song for which Hansen wrote the words. This material is dated between 1904 and 1947.

The travel material deals with Hansen's travels to Russia, Siberia, Central Asia, Turkestan, and Northern Africa. Included are maps, expenses, and a permit issued by Russia for Hansen in 1897. This material is dated between 1897.

Aceraceae Neck. Acer Ginnala Max. Plant specimen from the maple family collected by N.E. Hansen, 1924. N.E. Hansen (1866-1950) was a Danish-American horticulturist and botanist who was a pioneer in plant breeding. Hansen came to South Dakota in 1895 and became the first head of the Horticultural Department of South Dakota State College. He also served as agricultural explorer for the United States Department of Agriculture. He searched for hardy grasses, fruits, and other plants throughout Europe and Asia and brought them back to the United States to raise or crossbreed with American varieties to produce hardy plants. Specimen is mounted on an 11.5 x 16.5 inch herbarium sheet accompanied by a label printed in Russian in Cyrillic letter with hand-written notation in black ink.

Aceraceae Neck. Acer Mairunduense ? et Mey.. Plant specimen from the maple family collected by N.E. Hansen, 1924. N.E. Hansen (1866-1950) was a Danish-American horticulturist and botanist who was a pioneer in plant breeding. Hansen came to South Dakota in 1895 and became the first head of the Horticultural Department of South Dakota State College. He also served as agricultural explorer for the United States Department of Agriculture. He searched for hardy grasses, fruits, and other plants throughout Europe and Asia and brought them back to the United States to raise or crossbreed with American varieties to produce hardy plants. Specimen is mounted on an 11.5 x 16.5 inch herbarium sheet accompanied by a label printed in Russian in Cyrillic letter with hand-written notation in black ink.

Aceraceae Neck. Acer Mons Max. Plant specimen from the maple family collected by N.E. Hansen, 1924. N.E. Hansen (1866-1950) was a Danish-American horticulturist and botanist who was a pioneer in plant breeding. Hansen came to South Dakota in 1895 and became the first head of the Horticultural Department of South Dakota State College. He also served as agricultural explorer for the United States Department of Agriculture. He searched for hardy grasses, fruits, and other plants throughout Europe and Asia and brought them back to the United States to raise or crossbreed with American varieties to produce hardy plants. Specimen is mounted on an 11.5 x 16.5 inch herbarium sheet accompanied by a label printed in Russian in Cyrillic letter with hand-written notation in black ink.

Aceraceae Neck. Acer Tomentosum Max. Plant specimen from the maple family collected by N.E. Hansen, 1924. N.E. Hansen (1866-1950) was a Danish-American horticulturist and botanist who was a pioneer in plant breeding. Hansen came to South Dakota in 1895 and became the first head of the Horticultural Department of South Dakota State College. He also served as agricultural explorer for the United States Department of Agriculture. He searched for hardy grasses, fruits, and other plants throughout Europe and Asia and brought them back to the United States to raise or crossbreed with American varieties to produce hardy plants. Specimen is mounted on an 11.5 x 16.5 inch herbarium sheet accompanied by a label printed in Russian in Cyrillic letter with hand-written notation in black ink.

Caprifoliaceae Vent. Lonicera edulis Turcr. Plant specimen from the honeysuckle family collected by N.E. Hansen, 1924. N.E. Hansen (1866-1950) was a Danish-American horticulturist and botanist who was a pioneer in plant breeding. Hansen came to South Dakota in 1895 and became the first head of the Horticultural Department of South Dakota State College. He also served as agricultural explorer for the United States Department of Agriculture. He searched for hardy grasses, fruits, and other plants throughout Europe and Asia and brought them back to the United States to raise or crossbreed with American varieties to produce hardy plants. Specimen is mounted on an 11.5 x 16.5 inch herbarium sheet accompanied by a label printed in Russian in Cyrillic letter with hand-written notation in black ink.

Caprifoliaceae Vent. Lonicera Maacki Turcr. Plant specimen from the honeysuckle family collected by N.E. Hansen, 1924. This plant is native to temperate western Asia, specifically in northern and western China south to Yunnan, Mongolia, Primorsky Krai in southeastern Russia, Korea, and, albeit rare there, central and northern Honshu, Japan. N.E. Hansen (1866-1950) was a Danish-American horticulturist and botanist who was a pioneer in plant breeding. Hansen came to South Dakota in 1895 and became the first head of the Horticultural Department of South Dakota State College. He also served as agricultural explorer for the United States Department of Agriculture. He searched for hardy grasses, fruits, and other plants throughout Europe and Asia and brought them back to the United States to raise or crossbreed with American varieties to produce hardy plants.

Pinus pungens, also called Table Mountain Pine, hickory pine, prickly pine or mountain pine. This small pine is native to the Appalachian Mountains in the United States. Plant specimen collected by C.S. Sargent, 1912, first director of the Arnold Arboretum, Herbarium of Iowa College of Agriculture and Mechanic Arts, Ames, Iowa. N.E. Hansen graduated from Iowa State College with a bachelor's degree in horticulture in 1887. It is likely Hansen obtained this specimen during his time at the college. N.E. Hansen (1866-1950) was a Danish-American horticulturist and botanist who was a pioneer in plant breeding. Hansen came to South Dakota in 1895 and became the first head of the Horticultural Department of South Dakota State College. He also served as agricultural explorer for the United States Department of Agriculture. He searched for hardy grasses, fruits, and other plants throughout Europe and Asia and brought them back to the United States to raise or crossbreed with American varieties to produce hardy plants. Specimen is mounted on an 11.5 x 16.5 inch herbarium sheet accompanied by a label with hand-written notation in pencil ink.

Primulaceae Vent. Primula. Plant specimen collected by N.E. Hansen, 1924. N.E. Hansen (1866-1950) was a Danish-American horticulturist and botanist who was a pioneer in plant breeding. Hansen came to South Dakota in 1895 and became the first head of the Horticultural Department of South Dakota State College. He also served as agricultural explorer for the United States Department of Agriculture. He searched for hardy grasses, fruits, and other plants throughout Europe and Asia and brought them back to the United States to raise or crossbreed with American varieties to produce hardy plants.

Prunus persica. Dbl. fl. Peach. Kaises VII. Plant specimen collected by N.E. Hansen, 1924. The peach (Prunus persica) is a deciduous tree native to the region of Northwest China between the Tarim Basin and the north slopes of the Kunlun Shan mountains, where it was first domesticated and cultivated. N.E. Hansen (1866-1950) was a Danish-American horticulturist and botanist who was a pioneer in plant breeding. Hansen came to South Dakota in 1895 and became the first head of the Horticultural Department of South Dakota State College. He also served as agricultural explorer for the United States Department of Agriculture. He searched for hardy grasses, fruits, and other plants throughout Europe and Asia and brought them back to the United States to raise or crossbreed with American varieties to produce hardy plants. Specimen is mounted on an 11.5 x 16.5 inch herbarium sheet accompanied by a label with hand-written notation in pencil ink.

Rosaceae B. Juss. Micromeles alnifolia Koehne. Plant specimen collected by N.E. Hansen, 1924. N.E. Hansen (1866-1950) was a Danish-American horticulturist and botanist who was a pioneer in plant breeding. Hansen came to South Dakota in 1895 and became the first head of the Horticultural Department of South Dakota State College. He also served as agricultural explorer for the United States Department of Agriculture. He searched for hardy grasses, fruits, and other plants throughout Europe and Asia and brought them back to the United States to raise or crossbreed with American varieties to produce hardy plants. Specimen is mounted on an 11.5 x 16.5 inch herbarium sheet accompanied by a label printed in Russian in Cyrillic letter with hand-written notation in blank ink.

Rosaceae B. Juss. Prunus padus L. Plant specimen collected by N.E. Hansen, 1924, also known as bird cherry, hackberry, hagberry, or Mayday tree, is a species of cherry, native to norther Europe and northern Asia. N.E. Hansen (1866-1950) was a Danish-American horticulturist and botanist who was a pioneer in plant breeding. Hansen came to South Dakota in 1895 and became the first head of the Horticultural Department of South Dakota State College. He also served as agricultural explorer for the United States Department of Agriculture. He searched for hardy grasses, fruits, and other plants throughout Europe and Asia and brought them back to the United States to raise or crossbreed with American varieties to produce hardy plants. Specimen is mounted on an 11.5 x 16.5 inch herbarium sheet accompanied by a label with hand-written notation in pencil ink.

Rosaceae B. Juss. Pyrus ussuriensis Max +P. Sinensis Lindl. Plant specimen collected by N.E. Hansen, 1924, also known as the Ussurian pear, Harbin pear, and Manchurian pear, is a species of flowering plant in the family Rosaceae. It is native to Korea, Japan, and the Ussuri River area of far eastern Russia. N.E. Hansen (1866-1950) was a Danish-American horticulturist and botanist who was a pioneer in plant breeding. Hansen came to South Dakota in 1895 and became the first head of the Horticultural Department of South Dakota State College. He also served as agricultural explorer for the United States Department of Agriculture. He searched for hardy grasses, fruits, and other plants throughout Europe and Asia and brought them back to the United States to raise or crossbreed with American varieties to produce hardy plants. Specimen is mounted on an 11.5 x 16.5 inch herbarium sheet accompanied by a label printed in Russian in Cyrillic letter with hand-written notation in blank ink.

Rosaceae B. Juss. Spirea Chamaedrifolia L. Common name germander meadowsweet or elm-leaved spirea. Plant specimen collected by N.E. Hansen, 1924. Spiraea chamaedryfolia is a shrub reaching a height of 1–1.5 meters (3 feet 3 inches–4 feet 11 inches). Branchlets are brownish or red-brown. Leaves are simple, oblong or lance-shaped, toothed on the edges, 40–60 millimeters (1.6–2.4 inches) long and 10–30 millimeters (0.39–1.18 inches) wide, with a petiole of 4–7 millimeters. The white flowers of 6–9 millimeters in diameter grow in spike-like clusters at the ends of the branches. Flowering period extends from May to September. N.E. Hansen (1866-1950) was a Danish-American horticulturist and botanist who was a pioneer in plant breeding. Hansen came to South Dakota in 1895 and became the first head of the Horticultural Department of South Dakota State College. He also served as agricultural explorer for the United States Department of Agriculture. He searched for hardy grasses, fruits, and other plants throughout Europe and Asia and brought them back to the United States to raise or crossbreed with American varieties to produce hardy plants. Specimen is mounted on an 11.5 x 16.5 inch herbarium sheet accompanied by a label printed in Russian in Cyrillic letter with hand-written notation in black ink.

Rosaceae B. Juss. Spirea Chamaedrifolia L. Common name germander meadowsweet or elm-leaved spirea. Plant specimen collected by N.E. Hansen, 1924. Spiraea chamaedryfolia is a shrub reaching a height of 1–1.5 meters (3 feet 3 inches–4 feet 11 inches). Branchlets are brownish or red-brown. Leaves are simple, oblong or lance-shaped, toothed on the edges, 40–60 millimeters (1.6-2.4 inches) long and 10-30 millimeters (0.39-1.18 inches) wide, with a petiole of 4-7 millimeters. The white flowers of 6-9 millimeters in diameter grow in spike-like clusters at the ends of the branches. Flowering period extends from May to September. N.E. Hansen (1866-1950) was a Danish-American horticulturist and botanist who was a pioneer in plant breeding. Hansen came to South Dakota in 1895 and became the first head of the Horticultural Department of South Dakota State College. He also served as agricultural explorer for the United States Department of Agriculture. He searched for hardy grasses, fruits, and other plants throughout Europe and Asia and brought them back to the United States to raise or crossbreed with American varieties to produce hardy plants. Specimen is mounted on an 11.5 x 16.5 inch herbarium sheet accompanied by a label printed in Russian in Cyrillic letter with hand-written notation in black ink.

Rosaceae B. Juss. Spirea media Schmidt. Plant specimen collected by N.E. Hansen, 1924. N.E. Hansen (1866-1950) was a Danish-American horticulturist and botanist who was a pioneer in plant breeding. Hansen came to South Dakota in 1895 and became the first head of the Horticultural Department of South Dakota State College. He also served as agricultural explorer for the United States Department of Agriculture. He searched for hardy grasses, fruits, and other plants throughout Europe and Asia and brought them back to the United States to raise or crossbreed with American varieties to produce hardy plants. Specimen is mounted on an 11.5 x 16.5 inch herbarium sheet accompanied by a label printed in Russian in Cyrillic letter with hand-written notation in blank ink.

Saxifragaceae Dumort. Deutzia parviflora Bunge. Plant specimen collected by N.E. Hansen, 1924. Saxifragaceae are found mostly in the Northern Hemisphere, with centers of diversity in the Himalayas, East Asia, and Western North America. N.E. Hansen (1866-1950) was a Danish-American horticulturist and botanist who was a pioneer in plant breeding. Hansen came to South Dakota in 1895 and became the first head of the Horticultural Department of South Dakota State College. He also served as agricultural explorer for the United States Department of Agriculture. He searched for hardy grasses, fruits, and other plants throughout Europe and Asia and brought them back to the United States to raise or crossbreed with American varieties to produce hardy plants. Specimen is mounted on an 11.5 x 16.5 inch herbarium sheet accompanied by a label printed in Russian in Cyrillic letter with hand-written notation in blank ink.

Saxofragaceae Dumort. Ribes manshuricum (Max.) Kom. Plant specimen collected by N.E. Hansen, 1924. Saxifragaceae are found mostly in the Northern Hemisphere, with centers of diversity in the Himalayas, East Asia, and Western North America. N.E. Hansen (1866-1950) was a Danish-American horticulturist and botanist who was a pioneer in plant breeding. Hansen came to South Dakota in 1895 and became the first head of the Horticultural Department of South Dakota State College. He also served as agricultural explorer for the United States Department of Agriculture. He searched for hardy grasses, fruits, and other plants throughout Europe and Asia and brought them back to the United States to raise or crossbreed with American varieties to produce hardy plants. Specimen is mounted on an 11.5 x 16.5 inch herbarium sheet accompanied by a label printed in Russian in Cyrillic letter with hand-written notation in black ink.