EC95-1249 Potato Production Stages: Scheduling Key Practices

Characterization of potato growth and development is important for the scheduling of production practices, yield prediction and hail loss insurance. Most past descriptions emphasize above-ground vine growth, and neglect below-ground tubers. Recently, growth stages have been described integrating both practices to them. This circular describes stages of potato production and indicates key practices at each stage

Growing Potato Profitably for Organic Dry Matter Production in Western Nebraska

Growing potato conventionally for dehydration is not economically feasible. The key cost would be seed under organic farming. The objective is to identify seed-piece sizes and spacings producing a profitable return for potato dehydration in western Nebraska. Atlantic potatoes were grown under dryland conditions using organic practices. Rain was 205, 270, and 360 mm in 2013, 2014, and 2015. Seed-pieces were hand-cut into five weights from 42.5 to 85.0 g and planted in five spacings from 15.2 to 45.7 cm. Seeding rates were 1.02 to 6.1 Mg/ha. Yield was highest at the spacing of 15.2 cm (16.1 Mg/ha) and decreased to 12.4 Mg/ha when seed-pieces were planted at 38.1 and 45.7 cm apart. Seed-piece size had little effect except that yield was lowest with 42.5 g pieces at 13.2 Mg/ha and increased to 14.2 Mg/ha with 63.8 g and larger. Specific gravity decreased slightly when pieces were spaced 30.5 cm (1.092) compared to 15.2 cm (1.094). Seed size had no effect. The size and spacing combinations with the highest yield were not found to be economical due to higher seed cost. Planting seed-pieces weighing 56.7 g, and planted 38.1 and 45.7 cm apart in 91 cm rows were economically feasible for dry matter production. The net returns, taking into account seed cost, transportation, and operations, for this combination was $326/ha, greater than for dryland winter wheat and millet. This study showed that western Nebraska would be a good location to grow dryland potatoes for organic dry matter production. Resumen: Cultivar la papa convencionalmente para deshidratación no es económicamente factible. El costo clave sería la semilla bajo siembra orgánica. El objetivo es identificar los tamaños de fragmentos de semilla y espaciamientos que produzcan un ingreso con ganancia para deshidratación de la papa en el oeste de Nebraska. Se cultivaron papas Atlantic bajo condiciones de suelo seco usando prácticas orgánicas. La lluvia fue de 205, 270 y 360 mm en 2013, 2014 y 2015. Se cortaron a mano los fragmentos de semilla en cinco pesos, de 42.5 a 85.0 g, y se plantaron en cinco espaciamientos de 15.2 a 45.7 cm. Los niveles de semilla fueron de 1.02 a 6.1 Mg/ha. El más alto rendimiento se obtuvo con el espaciamiento de 15.2 cm (16.1 Mg/ha) y disminuyó a 12.4 Mg/ha cuando los fragmentos de semilla se plantaron a 38.1 y 45.7 cm de distancia. El tamaño del fragmento de semilla tuvo poco efecto, excepto que el rendimiento fue el más bajo con piezas de 42.5 g a 13.2 Mg/ha y aumentó a 14.2 Mg/ha con 63.8 g y más grandes. Las gravedad específica disminuyó ligeramente cuando los fragmentos se espaciaron a 30.5 cm (1.092) en comparación con 15.2 cm (1.094). El tamaño de la semilla no tuvo efecto. Las combinaciones de tamaño y espaciamiento con el rendimiento más alto no se vio que fueran económicas, debido al costo más alto de semilla. Al sembrar piezas de semilla con peso de 56.7 g, a separaciones de 38.1 y 45.7 cm entre ellas, en surcos a 91 cm, fue económicamente posible para la producción de materia seca. La recuperación neta, tomando en consideración el costo de semilla, transporte y operaciones, para esta combinación, fue de$ 326/ha, mayor que para trigo de invierno y mijo en suelo seco. Este estudio mostró que el oeste de Nebraska pudiera ser un buen lugar para cultivar papa en suelo seco para producción de materia seca orgánica

EC92-1247-D Nebraska Potato Cultivar Tests 1989-91

Extension Circular 92-1247-D: This circular is a progress report of potato cultivar trials conducted from 1989-1991 by the Panhandle Research and Extension Center

G92-1090 Black Dot Disease of Potato

The cause, symptom, disease cycle, influencing factors, effects and control of black dot are described. Black dot of potato, a disease caused by the fungus Colletotrichum coccodes, was recognized in Australia and Europe, then was observed and described in Canada in 1921. Since then this disease has spread to many potato production areas of the United States; its occurrence was first reported in Nebraska in 1988. In the past few years, black dot has been recognized on infected potato tissue from several areas of the state. The increased incidence of black dot in Nebraska may have been favored by high temperatures and heavy irrigation. Black dot often has been reported as a minor disease. Under favorable conditions, especially on poorly drained, sandy soils, it can result in significant yield losses in the field and loss of quality of infected tubers in storage

Government Insurance Program Design, Incentive Effects, and Technology Adoption: The Case of Skip-Row Crop Insurance

Can the availability of poorly-designed government insurance alter technology adoption decisions? A theoretical model of technology adoption and insurance incentive effects for a high- and low-risk technology is developed and explored empirically using a unique dataset of skip-row agronomic trial data. A multivariate nonparametric resampling technique is developed, which augments the trial data with a larger dataset of conventional yields to improve estimation efficiency. Skip-row adoption is found to increase mean yields and reduce risk in areas prone to drought. RMA insurance rules have incentive-distorting impacts which disincentivize skip-row adoption

Adaptability of irrigated spring canola oil production to the US High Plains

Canola oil is high in oleic acid which is commonly used for food and industrial purposes. To determine adaptability of spring canola (Brassica napus L.) to the High Plains for industrial oil production, 26 irrigated trials were conducted from 2005 to 2008. Trials were divided into five regions—1: 36–37◦N 108◦W; 2: 39–40◦N 101–103◦W; 3: 41–42◦N 102–103◦W; 4: 41–42◦N 104◦W; 5: 43–44◦N 106–108◦W. Cultural practices were based on site-specific protocols. Four cultivars, Hyola 401, Hyola 357 Magnum, SW Marksman, and SW Patriot, were planted in replicated plots in April or May under standard irrigation and harvested in July to October depending on region. Seed yield Hyola 401 and Hyola 357 Magnum were higher than SW Marksman and SW Patriot across the five regions and within Regions 1, 2, 3, and 5. Regions 1, 2 and 3 yielded significantly greater than did Regions 4 and 5. Samples from 18 trials were examined for their oil content and fatty acid distribution. The four cultivars had greater than 38% oil content; SW Marksman and SW Patriot had higher oil content than Hyola 401 and Hyola 357 Mag. Higher oil content was achieved in Regions 1, 4 and 5. Across and within regions, the percent of oleic acid did not differ for the four cultivars. The mean content of oleic acid decreased going north from Region 2 to Region 5, as did seed yield in the High Plains. Linoleic acid increased going north from Region 1. Linolenic acids showed little variation across regions. Considering yield and total oil content together, growing spring canola would be excellent in the High Plains

Adaptability of irrigated spring canola oil production to the US High Plains

Canola oil is high in oleic acid which is commonly used for food and industrial purposes. To determine adaptability of spring canola (Brassica napus L.) to the High Plains for industrial oil production, 26 irrigated trials were conducted from 2005 to 2008. Trials were divided into five regions—1: 36–37◦N 108◦W; 2: 39–40◦N 101–103◦W; 3: 41–42◦N 102–103◦W; 4: 41–42◦N 104◦W; 5: 43–44◦N 106–108◦W. Cultural practices were based on site-specific protocols. Four cultivars, Hyola 401, Hyola 357 Magnum, SW Marksman, and SW Patriot, were planted in replicated plots in April or May under standard irrigation and harvested in July to October depending on region. Seed yield Hyola 401 and Hyola 357 Magnum were higher than SW Marksman and SW Patriot across the five regions and within Regions 1, 2, 3, and 5. Regions 1, 2 and 3 yielded significantly greater than did Regions 4 and 5. Samples from 18 trials were examined for their oil content and fatty acid distribution. The four cultivars had greater than 38% oil content; SW Marksman and SW Patriot had higher oil content than Hyola 401 and Hyola 357 Mag. Higher oil content was achieved in Regions 1, 4 and 5. Across and within regions, the percent of oleic acid did not differ for the four cultivars. The mean content of oleic acid decreased going north from Region 2 to Region 5, as did seed yield in the High Plains. Linoleic acid increased going north from Region 1. Linolenic acids showed little variation across regions. Considering yield and total oil content together, growing spring canola would be excellent in the High Plains

EC95-1249 Potato Production Stages: Scheduling Key Practices

Characterization of potato growth and development is important for the scheduling of production practices, yield prediction and hail loss insurance. Most past descriptions emphasize above-ground vine growth, and neglect below-ground tubers. Recently, growth stages have been described integrating both practices to them. This circular describes stages of potato production and indicates key practices at each stage

G1437 Green Potatoes: The Problems And The Solution

This publication outlines how potatoes turn green and form a harmful substance which can cause an allergic reaction, and how to avoid this development. Green potato tubers are easily identified by their surface coloration. This green coloration ( greening also called sun-burning ) can be as much as a half-inch deep in severe cases. French fries made from green potatoes will have a green end and potato chips will have a green edge. Associated with greening is the formation of a natural chemical that can cause allergic reactions and illness. This publication outlines how potatoes turn green and how to avoid such occurrences

Growing Potato Profitably for Organic Dry Matter Production in Western Nebraska

Growing potato conventionally for dehydration is not economically feasible. The key cost would be seed under organic farming. The objective is to identify seed-piece sizes and spacings producing a profitable return for potato dehydration in western Nebraska. Atlantic potatoes were grown under dryland conditions using organic practices. Rain was 205, 270, and 360 mm in 2013, 2014, and 2015. Seed-pieces were hand-cut into five weights from 42.5 to 85.0 g and planted in five spacings from 15.2 to 45.7 cm. Seeding rates were 1.02 to 6.1 Mg/ha. Yield was highest at the spacing of 15.2 cm (16.1 Mg/ha) and decreased to 12.4 Mg/ha when seed-pieces were planted at 38.1 and 45.7 cm apart. Seed-piece size had little effect except that yield was lowest with 42.5 g pieces at 13.2 Mg/ha and increased to 14.2 Mg/ha with 63.8 g and larger. Specific gravity decreased slightly when pieces were spaced 30.5 cm (1.092) compared to 15.2 cm (1.094). Seed size had no effect. The size and spacing combinations with the highest yield were not found to be economical due to higher seed cost. Planting seed-pieces weighing 56.7 g, and planted 38.1 and 45.7 cm apart in 91 cm rows were economically feasible for dry matter production. The net returns, taking into account seed cost, transportation, and operations, for this combination was $326/ha, greater than for dryland winter wheat and millet. This study showed that western Nebraska would be a good location to grow dryland potatoes for organic dry matter production. Resumen: Cultivar la papa convencionalmente para deshidratación no es económicamente factible. El costo clave sería la semilla bajo siembra orgánica. El objetivo es identificar los tamaños de fragmentos de semilla y espaciamientos que produzcan un ingreso con ganancia para deshidratación de la papa en el oeste de Nebraska. Se cultivaron papas Atlantic bajo condiciones de suelo seco usando prácticas orgánicas. La lluvia fue de 205, 270 y 360 mm en 2013, 2014 y 2015. Se cortaron a mano los fragmentos de semilla en cinco pesos, de 42.5 a 85.0 g, y se plantaron en cinco espaciamientos de 15.2 a 45.7 cm. Los niveles de semilla fueron de 1.02 a 6.1 Mg/ha. El más alto rendimiento se obtuvo con el espaciamiento de 15.2 cm (16.1 Mg/ha) y disminuyó a 12.4 Mg/ha cuando los fragmentos de semilla se plantaron a 38.1 y 45.7 cm de distancia. El tamaño del fragmento de semilla tuvo poco efecto, excepto que el rendimiento fue el más bajo con piezas de 42.5 g a 13.2 Mg/ha y aumentó a 14.2 Mg/ha con 63.8 g y más grandes. Las gravedad específica disminuyó ligeramente cuando los fragmentos se espaciaron a 30.5 cm (1.092) en comparación con 15.2 cm (1.094). El tamaño de la semilla no tuvo efecto. Las combinaciones de tamaño y espaciamiento con el rendimiento más alto no se vio que fueran económicas, debido al costo más alto de semilla. Al sembrar piezas de semilla con peso de 56.7 g, a separaciones de 38.1 y 45.7 cm entre ellas, en surcos a 91 cm, fue económicamente posible para la producción de materia seca. La recuperación neta, tomando en consideración el costo de semilla, transporte y operaciones, para esta combinación, fue de$ 326/ha, mayor que para trigo de invierno y mijo en suelo seco. Este estudio mostró que el oeste de Nebraska pudiera ser un buen lugar para cultivar papa en suelo seco para producción de materia seca orgánica