Pear tree in the mountains was photographed as an example during N.E. Hansen's research on pears at Saolin in northern China; written in pencil on the back: Saolin, China my headquarters fro pears in the mountains 1924

Tree surrounded by a small lattice fence in a park in Harbin, China; written in pencil on the back: Park at Harbin 1924

Garden feature by a small lattice fence in a park in Harbin, China; written in pencil on the back: Park at Harbin 1924

Child running by the ornamental plantings surrounded by a fence in a park in Harbin, China; written in pencil on the back: Park at Harbin 1924

Ornamental plantings surrounded by a fence in a park in Harbin, China; written in pencil on the back: Park at Harbin 1924

Ornamental plantings surrounded by a fence in a park in Harbin, China; written in pencil on the back: Park at Harbin 1924

Ornamental plantings in a park in Harbin, China; written in pencil on the back: Park at Harbin 1924

Ornamental plantings and statuary in a park in Harbin, China; written in pencil on the back: Park at Harbin 1924

Man standing by some ornamental plantings in a park in Harbin, China; written in pencil on the back: Park at Harbin 1924

Ornate sign hanging over store in Manzhouli, Manchuria in northern China; written in pencil on the back: Manchouli North China 1924

Ornate designs on a building in Manzhouli, Manchuria in northern China; written in pencil on the back: Manchouli North China 1924

Research notebook for N.E. Hansen's experiments with grasses, clovers, and forage that were conducted near the Hunter Salzer Farm by Mellet, South Dakota in 1897 with remarks about 1896. The first part of the notebook discusses his experiments on 38 plots, which included numerous varieties of grasses, oats, wheat, alfalfa, clovers, and corn. The notebook also details his research on an additional 64 plots of grasses and forage plants. The notes include his assessments of the varieties and comments regarding the weather.

N.E Hansen's research notebook regarding field experiments for grasses and grains in 1888 and 1889. The field consisted of 66 plots. He studied 92 varieties in total including: 22 grasses, 9 clovers, 20 wheats, 23 oats, 14 barleys, 1 rye. Hansen was assisted by John M. Aldrich, Alvah George Cross, and J.G. Ross.

Research notebook for N.E. Hansen's experiments with alfalfa for 1911, with notes regarding 1909 and 1910 experiments. Varieties studied include Omsk, Cossack, Samara, North Sweden, Obb Siberia, and Cherno.

Research notebook for N.E. Hansen's experiments with alfalfa, which were conducted throughout South Dakota in 1913. Places include Faith, Ipswich, Isabel, Kadoka, Lemmon, Miller, Mobridge, Pierre, Vivian, and Winner. Varieties studied include Samara, Cossack, Cherno, and Semipalatinsk.

Field research notebook of N. E. Hansen. Alfalfa and clover grasses planted May 1908. Varieties studied originated from Norway, Turkistan, Russia, Siberia, Sweden, Lapland, and South America. Several varieties came from the Moscow Agricultural College (Moscow Timiryazev Agricultural Academy).

Field research notebook of N.E. Hansen. Alfalfa and clover plats planted July 20, 1907. Varieties studied originated from Norway, Turkistan, Russia, Siberia, Sweden, Lapland, and South America. Handwritten

N.E. Hansen's headquarters while conducting pear research at Saolin in northern China; written in pencil on the back: Saolin, China my headquarters for pears in the mountains 1924

N.E. Hansen's mountain headquarters is nestled in the trees while conducting pear research at Saolin in northern China; written in pencil on the back: Saolin, China my headquarters fro pears in the mountains 1924

N.E. Hansen's mountain headquarters is nestled in the trees while conducting pear research at Saolin in northern China; written in pencil on the back: Saolin, China my headquarters fro pears in the mountains 1924

N.E. Hansen's assistants gather specimens in their search for hardy peach trees in Mendoche in northern China in 1924, one man is holding a gun; written in pencil on the back: Mendoche, North China 1924

Four of N.E. Hansen's assistants stand by a horse-drawn wagon by a building at Mendoche before they begin a search for hardy peach trees in northern China; written in pencil on the back: Mendoche 1924 North China

N.E. Hansen (wearing hat) is with friends in Brookings, South Dakota; writing on the back: S.D. plant wizard and friends Brookings 5-19-39 compliments York Sampson

N.E. Hansen is standing behind a man with a carrying pole on his shoulders and two baskets full of pears at Hansen's headquarters while conducting pear research at Saolin in northern China, there are two men accompanying them; written in pencil on the back: North China 1924

N.E. Hansen is standing behind a man with a carrying pole on his shoulders and two baskets full of pears at Hansen's headquarters while conducting pear research at Saolin in northern China, there are two men accompanying them, another man stands off to the left; written in pencil on the back: North China 1924

N.E. Hansen standing by a fruit tree on the campus of South Dakota State College that was part of Hansen's research on fruit

N.E. Hansen looking at a fruit tree on the campus of South Dakota State College that was part of Hansen's research on fruit

N.E. Hansen looking at a fruit tree on the campus of South Dakota State College that was part of Hansen's research on fruit

N.E. Hansen standing by a fruit tree on the campus of South Dakota State College that was part of Hansen's research on fruit

N.E. Hansen and a companion on a horse-drawn wagon ready to start the Da Hinggan mountain range in northern China; written in pencil on the back: Starting over the mountains to Hinggan 1924 North China

N.E. Hansen on the hardy alfalfa trail in Siberia, there are three horse-drawn wagons in a town, Hansen is riding on the first wagon

N.E. Hansen is seated the back of a horse drawn wagon full of wild Siberian alfalfa, there are camels behind him and several other people around him, the photographs was taken while N.E. Hansen was among the Kirghiz Tartars in Semipalatinsk, Siberia

N.E. Hansen Memorial Garden located at McCrory Gardens on the campus of South Dakota State University in Brookings, South Dakota

N.E. Hansen Memorial Garden located at McCrory Gardens on the campus of South Dakota State University in Brookings, South Dakota

N.E. Hansen wearing a Siberian costume and holding a sheaf of wild Siberian flowered alfalfa

N.E. Hansen during his trip to Russia in 1934

N.E. Hansen with a man wearing white in Fushun, Manchuria in northern China; written in pencil on the back: Futachien 1924

N.E. Hansen posing for a photograph with four people Chelyabinsk, Russia; written in pencil on the back: Tscheljabinsk 1934

N.E. Hansen looking at a sapling tree at in orchard in Chelyabinsk, Russia with two other men; written in pencil on the back: Tscheljabinsk 1934

N.E. Hansen and another man are sitting in rickshaws while Hansen was on the hunt for pears in northern China, there are several children surrounding them; written in pencil on the back: 1924 Hunting for Pears Niels Hansen north China

N.E. Hansen and another man are standing in a Kaoliang sorghum field at Echo in Manchuria, China; written in pencil on the back: Kaoliang at Echo, Manchuria 1924

N.E. Hansen with two others standing in a Kaoliang sorghum field at Echo in Manchuria, China; written in pencil on the back: Kaoliang at Echo, Manchuria 1924

N.E. Hansen with two others standing in a Kaoliang sorghum field at Echo in Manchuria, China; written in pencil on the back: Kaoliang at Echo, Manchuria 1924

N.E. Hansen and another man are standing in a Kaoliang sorghum field at Echo in Manchuria, China; written in pencil on the back: Kaoliang at Echo, Manchuria 1924

Man smiles for the camera while N.E. Hansen is looking the fruit he has for sale at a bazaar in Harbin, China; written in pencil on the back: Harbin 1924

N.E. Hansen stands in front of the South Dakota Agricultural Experiment Station display, there is a sign that encourages viewers to 'Join the State Horticultural Society' and features the Waneta Plum, there is a sign for 'Breeding Hardy Fruits"" and may South Dakota State College pennants and a United States flag hanging on the wall in the booth

N.E. Hansen looking at bags of soybeans at a bazaar in Fushun, Manchuria in northern China, there are men sitting by a building in the background; written in pencil on the back: Soybeans at Futachien 1924

N.E. Hansen looking at onions and other vegetables for sale at a bazaar in Fushun, Manchuria in northern China; written in pencil on the back: Onions, etc. at Futachien 1924

N.E. Hansen at a bazaar in Fushun, Manchuria in northern China, there are men sitting by a building in the background; written in pencil on the back: Futachien 1924

N.E. Hansen and two assistants rest in the grass on their search for hardy peach trees in Mendoche in northern China in 1924; written in pencil on the back: Mendoche, North China 1924

N.E. Hansen and two assistants are gathering specimens in their search for hardy peach trees in Mendoche in northern China in 1924; written in pencil on the back: Mendoche, North China 1924

N.E. Hansen and two assistants climb rough terrain to gather specimens in their search for hardy peach trees in Mendoche in northern China in 1924; written in pencil on the back: Mendoche, North China 1924

N.E. Hansen and two assistants climb rough terrain to gather specimens in their search for hardy peach trees in Mendoche in northern China in 1924; written in pencil on the back: Mendoche, North China 1924

N.E. Hansen and two assistants are gathering specimens in their search for hardy peach trees in Mendoche in northern China in 1924; written in pencil on the back: Mendoche, North China 1924

N.E. Hansen and two assistants climb rough terrain to gather specimens in their search for hardy peach trees in Mendoche in northern China in 1924, Hansen is holding a peach tree specimen, one man is holding a gun; written in pencil on the back: Mendoche, North China 1924

N.E. Hansen and two assistants gather specimens in their search for hardy peach trees in Mendoche in northern China in 1924, Hansen is holding a peach tree specimen, one man is holding a gun, burlap bags are holding specimens, there is a dog in the foreground; written in pencil on the back: Mendoche, North China 1924

N.E. Hansen and two assistants climb rough terrain to gather specimens in their search for hardy peach trees in Mendoche in northern China in 1924; written in pencil on the back: Mendoche, North China 1924

N.E. Hansen and two assistants climb rough terrain to gather specimens in their search for hardy peach trees in Mendoche in northern China in 1924; written in pencil on the back: Mendoche, North China 1924

N.E. Hansen and native Manchu mountain farmer in Myfun in northern China in 1924, note the noodles and squash drying in the background; written in pencil on the back: Myfun, North China N.E. Hansen and native Manchu mountain farmer note macaroni hung up in rear and dried squash

N.E. Hansen and Ivan V. Michurin, a Russian horticulturalist, looking at a field notebook at his orchard in Russia

N.E. Hansen meeting Ivan V. Michurin, a Russian horticulturalist, at his orchard in Russia

N.E. Hansen (back row hear center with lighter color jacket, white beard) and Ivan V. Michurin (seated in front of Hansen) pose for a photograph with a large group of people at Michurin's orchard in Chelyabinsk, Russia

N.E. Hansen and his son, Carl Hansen, with three men at an orchard near Chelyabinsk, Russia; written in pencil on the back: one of the orchard places Russia 1934

N.E. Hansen and his son, Carl Hansen, in the back seat of a car with an unknown man in Chelyabinsk, Russia, there are people crowding around the car

N.E. Hansen (right of tree) and his son, Carl Hansen (far right) are with three other men in Russia

N.E. Hansen at Ivan V. Michurin's orchard near Chelyabinsk, Russia, Hansen's son, Carl Hansen, is behind him eating fruit

N.E. Hansen and his son, Carl Hansen, at an orchard near Chelyabinsk, Russia; written in pencil on the back: one of the orchard places Russia 1934

N.E. Hansen and his three assistants gathering specimens in a field with a horse-drawn wagon at Mendoche before they begin a search for hardy peach trees in northern China, there is a dog in the grass; written in pencil on the back: Mendoche 1924 North China

N.E. Hansen and his three assistants gathering specimens in a field with a horse-drawn wagon at Mendoche before they begin a search for hardy peach trees in northern China, there is a dog in the grass; written in pencil on the back: Mendoche 1924 North China

N.E. Hansen and his three assistants stand by a horse-drawn wagon by a building at Mendoche before they begin a search for hardy peach trees in northern China; written in pencil on the back: Mendoche 1924 North China

N.E. Hansen and his three assistants stand by a horse-drawn wagon by a building at Mendoche before they begin a search for hardy peach trees in northern China; written in pencil on the back: Mendoche 1924 North China

N.E. Hansen and his three assistants gathering specimens in a field with a horse-drawn wagon at Mendoche before they begin a search for hardy peach trees in northern China, there is a dog in the grass; written in pencil on the back: Mendoche 1924 North China

N.E. Hansen (wearing black collared overcoat and a hat) is standing by two horses drawing an unknown type of machinery, possible a planter of some king, there are three men, one driving and two sitting on the planter, the photograph was taken while N.E. Hansen was among the Kirghiz Tartars in Semipalatinsk, Siberia

The N.E. Hansen papers represent a comprehensive archive chronicling the career of Niels Ebbesen Hansen. The collection encompasses a diverse range of materials, including authored articles, bulletins, and circulars from Hansen's tenure at the South Dakota Experiment Station, as well as field notebooks, and ledgers from the South Dakota Horticultural Society.

Contributions from Helen Hansen Loen, Hansen's granddaughter, further enrich the collection with addresses, correspondence, journals, and travel documents, offering a deeper understanding of his professional and personal life. Notable highlights include addresses delivered by Hansen at prestigious events like the International Congress of Genetics in Berlin, underscoring his scholarly impact.

The collection's breadth extends to reports on forestry, sheep, and forage crops, reflecting Hansen's diverse interests. Manuscripts delve into topics ranging from agricultural practices to fine arts, while photographs document Hansen's expeditions to Siberia and Northern China, providing visual context to his exploratory work. Of particular significance are Hansen's manuscripts examining Soviet Russia's socio-political and economic landscape from 1934 to 1937. These writings offer valuable insights into agricultural collectivization, industrialization, and societal dynamics during that period, complementing Hansen's broader contributions to agricultural science.

Mountain scenery on the Trans-Siberian Railway at Saolin in northern where N.E. Hansen was conducting research on pears

Mountain scenery by the Trans-Siberian Railway in northern China; written in pencil on the back: North China 1924

Monument in General Ma Zhanshan Gardens in Harbin, China; written in pencil on the back: Monument General Ma's Garden on the outskirts of Harbin, China, 1924

Men working on a Trans-Siberian Railway train car enroute to Manzhouli, Manchuria in northern China; written in pencil on the back: Siberian Railway enroute to Manchouli 1924

Men selling wild grapes by the Trans-Siberian Railway east of Harbin, China; written in pencil on the back: Selling wild grapes on railway east of Harbin, 1924

Men walking over the rails at the Trans-Siberian Railway east of Harbin, China; written in pencil on the back: Siberian Railway east of Harbin, 1924

Monument dedicated to N.E. Hansen in recognition to his service to South Dakota State College, it was located in between the Administration Building and the Horticulture Building; the bronze citation reads: 'South Dakota State College seeks to perpetuate the memory of its long-time fruit and plant breeder: Niels Ebbesen Hansen. Born at Rebe, Denmark, January 4, 1866, came to the United States in 1873. Made Professor of Horticulture of South Dakota State College in 1895; Professor Emeritus in 1937. A world traveler and collector of plants, he developed drought resistant verities of fruits, flowers, and grasses for the Great Plains. His efforts provided the people of the Great Plains the means through which they enjoy a better living. August 25, 1959.' The rock was donated by Jno E. Gueffroy from near Colman, South Dakota. It is approximately 4.5 feet tall, 4.5 feet wide, with a 26 inch base.

Mausoleum of General Ma Zhanshan in Harbin, China; written in pencil on the back: Mausoleum built by General Ma for himself and two wives, Harbin, China, 1924

View of the Mausoleum of General Ma Zhanshan in Harbin, China; written in pencil on the back: Mausoleum built by General Ma for himself and two wives, Harbin, China, 1924