scholarly journals Challenges in the Production of High-Quality Seed Potatoes (Solanum tuberosum L.) in the Tropics and Subtropics

Agronomy ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 260
Author(s):  
Beata Wasilewska-Nascimento ◽  
Dominika Boguszewska-Mańkowska ◽  
Krystyna Zarzyńska
Keyword(s):  
Solanum Tuberosum L ◽  
Potato Industry ◽  
Natural Soil ◽  
High Quality ◽  
Seed Potatoes ◽  
Seed Supply ◽  
Long Time ◽  
High Quality Seed ◽  
The Tropics

The potato has been a widely used vegetable crop in temperate countries for a long time. Its consumption and the area of its cultivation has increased significantly over the past decades in the tropics and subtropics as well. The main problems of potato producers in the tropics and subtropics are the unsatisfactory quality of seed potatoes, mainly derived from the informal seed supply system, and the insufficient availability and high cost of certified seed potatoes. The hope for improving this situation can be the application of soil-less technologies for minituber production under controlled conditions. This publication focuses on important advantages of the aeroponic system in the production of pre-basic seed potatoes in the tropics and subtropics. It also highlights some deficiencies that can be overcome with the involvement of several actors in the potato industry, including local universities and the private sector. It emphasizes that innovative aeroponic installations are an opportunity to increase the production of high-quality seed potatoes in the countries of the tropics and subtropics, which, in many cases, will result in less dependence on expensive imported seed potatoes, often from a different climate zone. The introduction of aeroponic installations conserves the shrinking natural soil and water resources and contributes to their protection.

scholarly journals The potential for production of high quality seed potatoes in Tierra del Fuego Island, Argentina

1999 ◽  
Vol 42 (1) ◽  
pp. 9-23 ◽  
Author(s):  
D. O. Caldiz ◽  
O. H. Caso ◽  
G. Vater ◽  
L. V. Fernandez
Keyword(s):  
Tierra Del Fuego ◽  
High Quality ◽  
Seed Potatoes ◽  
High Quality Seed

scholarly journals Modelling of Railway Track Temperature Regime with Real Heat-Technical Values for Different Climatic Characteristics

2017 ◽  
Vol 13 (2) ◽  
pp. 134-142 ◽  
Author(s):  
Stanislav Hodás ◽  
Alžbeta Pultznerová
Keyword(s):  
Numerical Modelling ◽  
Temperature Regime ◽  
Railway Track ◽  
High Quality ◽  
Time Operation ◽  
Negative Temperatures ◽  
Freezing Period ◽  
Long Time ◽  
Climatic Characteristics

Abstract High quality of railway track construction is a major priority. One of the quality elements is the resistance to load of railway formation with individual structural layers caused by negative temperatures during the critical freezing period of winter. Numerical modelling allows obtaining more control outputs at different climatic loads. The presented paper shows the load of railway track model with different variants of climate and shows the importance in the designing of the non-transport load under negative temperatures, i.e. observation of transition of the zero isotherm through the layers of railway subgrade. If the subgrade layers of the railway formation are built with high quality and durability then the axis of the track will keep its geometric spatial position during the long-time operation.

scholarly journals Feeding different cultivars and quality levels of faba bean to broiler chickens

2021 ◽  
Author(s):  
Miranda N Smit ◽  
Liangfei He ◽  
Eduardo Beltranena
Keyword(s):  
Faba Bean ◽  
Broiler Chickens ◽  
Frost Damage ◽  
Daily Weight Gain ◽  
Quality Level ◽  
High Quality ◽  
Dressing Percentage ◽  
D 12 ◽  
High Quality Seed

Abstract A concern of both pulse growers and poultry producers is how frost damage around harvest time affects the nutritional quality of faba bean for broiler chickens. To investigate, 2 zero-tannin cultivars (Snowbird, Snowdrop) and 1 low vicine and convicine cultivar (Fabelle) sourced from seed growers were spring planted 3 weeks later than recommended (mid-May) and harvested late October to purposely increase frost damage. Parent, certified seed (high quality) and harvested frost damaged beans (low quality) of the 3 cultivars were fed to 740 chickens housed in 64 floor pens in a 2 x 3 factorial plus control (9 pens of 11 or 12 birds per treatment). Starter (d 0 to 11), grower (d 12 to 24) and finisher (d 25 to 40) diets included 15, 30, and 45% faba bean in partial (starter, grower) or total replacement of soybean meal (SBM; control). Harvested Snowbird, Snowdrop, Fabelle averaged 52, 62, 17% blackened hull and 35, 43, 51% immature beans, respectively. There was a cultivar x quality interaction (P < 0.05) on daily feed disappearance (ADFI) and gain-to-feed (G:F). Broilers fed low quality Snowdrop consumed 10 g/d more finisher and 6 g/d more feed overall than those fed low quality Snowbird or Fabelle; broilers fed parent seed were intermediate. Feeding low quality Fabelle resulted in best overall G:F (0.646) vs. high quality Snowbird (0.611), high quality Fabelle (0.624), or low quality Snowdrop (0.624). Average daily weight gain (ADG) and bird body weight (BW) at the end of each growth phase were not affected by cultivar or quality level. Controls fed SBM only grew 2.75 g/d faster overall and were 113.5 g heavier at the end of the trial than broilers fed faba bean (P < 0.05). Controls fed SBM only had 0.024 g/g better overall G:F than broilers fed faba bean (P < 0.05). Feeding low quality beans or high quality seed had no effect on antemortem BW, chilled carcass weight (WT), dressing percentage or yield of saleable cuts except that broilers fed Snowbird or Snowdrop had 0.8%-unit larger thighs than those fed Fabelle. Controls fed SBM only were 110 g heavier at slaughter, had 72 g heavier chilled carcass WT, and 0.5%-unit greater dressing percentage than broilers fed faba bean (P < 0.05). These results indicate that feeding frost damaged and(or) immature faba bean, to the extent observed in this trial, did not negatively affect growth performance or carcass attributes of broiler chickens compared to feeding parent, certified, high quality seed of these cultivars.

scholarly journals HEATING AND QUENCHING PROCEDURE ON THE MAKING OF TRADITIONAL BLACKSMITH STEEL WITH HIGH QUALITY

2019 ◽  
Vol 4 (1) ◽  
pp. 39-50
Author(s):  
Artoto Arkundato ◽  
Misto Misto ◽  
Hadi Paramu ◽  
Gaguk Jatisukamto ◽  
Iwan Sugihartono
Keyword(s):  
Community Service ◽  
Processing Time ◽  
High Hardness ◽  
Manufacturing Processes ◽  
Physical Processes ◽  
High Quality ◽  
Causal Factors ◽  
Heat Temperature ◽  
Long Time

Blacksmith is a people's business that has been going on for a long time in Indonesia. Based on the experience that has been obtained from time to time and hereditary, the blacksmith industry has been done by the community to meet the needs of agricultural and household utensils. However, observe to this people's business, now it decreases with various causal factors, such as the ease of imported goods on the market with lower prices. Many creative efforts need to be carried out so that these people's businesses remain and increasingly develop, among others by improving the quality of the process of a blacksmith so that their products are quite competitive. This article describes the results of the research in the laboratory regarding the physical processes of heating and quenching under blacksmith, which the results have been applied to community service activities at the Suger Kidul villages in Jember Regency. The study aimed to find the most appropriate procedure for steel tool manufacturing processes so that the blacksmith products have high quality as high hardness. The physical process for blacksmith process is heating and quenching. This study analyzes the proper heat (temperature), proper processing time, and proper media for heating and quenching to produce good harness quality of the product.

EFFECT OF A MINERAL FERTILIZERS DOSES AND PLANT CUTTING PERIOD TO SEED POTATOES YIELD

1970 ◽  
pp. 58-60
Author(s):  
М. N. Zakharova ◽  
L. V. Rozhkova ◽  
Е. Yu. Ushakova
Keyword(s):  
Winter Wheat ◽  
Viral Infection ◽  
Humus Content ◽  
Field Tests ◽  
Mineral Fertilizers ◽  
High Quality ◽  
New Variety ◽  
Seed Potatoes ◽  
Seed Material ◽  
High Quality Seed

To obtain high-quality seed material, it is necessary to form a crop that has the largest amount of standard seed fraction of tubers in its structure, and plants are less affected by viral infection. To obtain high-quality seed material, it is necessary to form a crop that has the largest amount of standard seed fraction of tubers in its structure, and plants are less affected by viral infection. The research was conducted in 2018-2019 on the experimental fields of ISA. The technology of cultivation of a new variety was studied in the link of crop rotation: peas – winter wheat + white mustard-potatoes – spring wheat. The area of the experiment is 0.25 ha, the accounting area is 10 m2, the repetition is fourfold. The soil of the site: dark gray forest, heavy loam; humus content of 3.15%; potassium is 16.2, phosphorus – 19,6; soil pH is 5.4. Predecessor – winter wheat. Scheme of experience. Application of mineral fertilizers before planting and mowing the tops after flowering: N96P96K96, after 30 days, N96P96K96-45, N128P128K128-30, N128P128K128-45 days. The yield was taken into account (24.09.18 and 23.09.19)with the analysis of tubers by fractions: large, seed and non-standard. Mathematical data processing was carried out by the method of dispersion analysis (Dospekhov B. A. Method of field experience, 1985). In the studies, the following protection systems were used: treatment of tubers with Maxim – 0.4 l/t, spraying with herbicides Lazurit Super-0.5 l / ha + Escudo-0.025 kg/ha, treatment of vegetating plants with fungicides Metaxil-2.5 kg/ha, Thanos-0.6 kg/ha and insecticide Borey-0.15 l / ha. The results of two-year field tests on the effect of different doses of mineral fertilizers and the timing of mowing the tops on the yield of seed potatoes of the eupatium variety in the Ryazan region are presented. It was found that when cultivating seed potatoes using the proposed technology, the crop yield increased from 27.9 to 38.0 t/ha with a seed yield of 39.1 to 48.1%.

Formation of High Quality β-FeSi2 by Pre-Amorphization-Enhanced Diffusion

2003 ◽  
Vol 792 ◽  
Author(s):  
Y. Murakami ◽  
A. Kenjo ◽  
T. Sadoh ◽  
T. Yoshitake ◽  
M. Miyao
Keyword(s):  
Solid Phase ◽  
Ion Irradiation ◽  
Formation Rate ◽  
Phase Growth ◽  
High Quality ◽  
Enhanced Diffusion ◽  
Si Substrates ◽  
Initial Stage ◽  
Long Time

ABSTRACTEffects of Ar+ ion irradiation on solid-phase growth of β-FeSi2 have been investigated. Si substrates were amorphized with Ar+ ions (20 keV) before Fe (15 nm) deposition to form Fe(15 nm)/a-Si/c-Si stacked structures. As a reference, Fe/c-Si stacked structures were prepared. In the initial stage of annealing at 800 °C, β-FeSi2 formation was enhanced for pre-amorphized samples, which was due to the enhanced diffusion of silicidation species. In the long time annealing, β-FeSi2 formation proceeded by thermal equilibrium diffusion, and the formation rate was not affected by pre-amorphization. Crystal quality of β-FeSi2 was improved by pre-amorphization. The pre-amorphization enhanced diffusion is useful for formation of high quality β-FeSi2 thin films.

scholarly journals Propuesta de igualdad de género en Educación Física: adaptaciones de las normas en fútbol (A gender equality proposal in Physical Education: adaptations of football rules)

Retos ◽  
2017 ◽  
pp. 293-297
Author(s):  
Laura Rodríguez Rodríguez ◽  
Emilio Miraflores Gómez
Keyword(s):  
Physical Education ◽  
Gender Equality ◽  
Gender Inequality ◽  
Role Models ◽  
Gender Inequalities ◽  
High Quality ◽  
Teaching Activity ◽  
Long Time ◽  
Students Attitudes

La desigualdad de género es un problema aún existente en nuestra sociedad. Aunque va evolucionando, positivamente, en el ámbito de la actividad física y el deporte, es evidente el largo camino que aún queda por recorrer para conseguir una igualdad real entre géneros. La Educación Física escolar es un medio desde el que se puede intervenir para intentar acabar con el problema, o en su caso, mitigarlo. El artículo muestra una propuesta de innovación, cuyo objetivo es vencer las desigualdades de género y sus estereotipos, como herencia histórica en nuestra sociedad. Para ello, se plantean unas propuestas de adaptación de las normas y reglas del fútbol, para su trabajo en las clases de Educación Física con alumnado de 2º curso de Educación Secundaria Obligatoria (ESO). La consecución de los objetivos previstos necesita de una alta calidad en la labor docente, como modelo, como medio promotor y corrector de las actitudes del alumnado, además de la transmisión de valores sobre igualdad.Abstract. Gender inequality exists and still is an issue even in today’s society. Though it has improved over the years, there is still a long way to go to achieve a real equality between both sexes in the field of physical activity and sports. Physical Education is a way from where we can intervene and try to eradicate this problem, or mitigate it. This article shows a proposal for innovation, whose goal is to eliminate gender inequalities and their associated stereotypes, stem from a long time in our society. To achieve that, this article presents several proposals of adaptations of different football rules, to be applied in Physical Education classes with 2nd Educación Secundaria Obligatoria (ESO) year students. The achievement of the expected goals needs a high quality of the teaching activity, teachers being role models, promoting and correcting students’ attitudes, as well as transmitting values of gender equality.

scholarly journals Research of technological properties of bread made with the addition of beet kvass

2021 ◽  
Vol 23 (96) ◽  
pp. 3-7
Author(s):  
H. Karpyk ◽  
M. Kukhtyn ◽  
V. Selskyi ◽  
I. Nazarko ◽  
O. Pokotylo ◽  
...  
Keyword(s):  
Healthy Eating ◽  
Rapid Development ◽  
Bakery Products ◽  
Technological Properties ◽  
Drying Process ◽  
High Quality ◽  
Physico Chemical ◽  
Long Time ◽  
Bread Production

The issue of healthy eating has always been relevant, especially this problem has been exacerbated by the rapid development of food technology and the production of a significant number of semi-finished products. As a result, there is a need to develop new types of food, including unleavened and low-calorie bread, bakery products enriched with vitamins, minerals, plant supplements. The aim of the work was to substantiate the technology of bread production with the use of beet kvass and to investigate the physico-chemical quality indicators of experimental samples of finished products. Technological indicators that characterize the quality of bread: moisture, porosity, crumbliness, acidity were determined by generally accepted methods. Bread made with beet kvass has been found to have well-developed crumb porosity, does not crumble for a long time, hardens slowly, and is resistant to microbiological spoilage. The crumb is not deformed and elastic when pressed. Replacing part of the water during the kneading of wheat dough with beet kvass (50 % by weight of flour) makes it possible to intensify the maturation of semi-finished products, both in traditional and accelerated technologies, to create a more complete nutrient medium for yeast activation, to obtain high quality bakery products storage. It has also been found that during the storage of bread, the hydrophilic properties of the crumb, its crumbliness changes slightly. The drying process is most intense during the first day, then slows down.

Sign in / Sign up

Export Citation Format

Share Document