scholarly journals Assessment of Heat Unit Availability and Potential Lint Yield of Cotton in Oklahoma

2020 ◽  
Vol 36 (6) ◽  
pp. 943-954
Author(s):  
Blessing Masasi ◽  
Saleh Taghvaeian ◽  
Prasanna H Gowda ◽  
Daniel N Moriasi ◽  
Patrick J Starks
Keyword(s):  
Air Temperature ◽  
Thermal Conditions ◽  
The United States ◽  
Planting Date ◽  
The State ◽  
Lint Yield ◽  
Cotton Production ◽  
Heat Unit ◽  
Cotton Lint

HighlightsWater availability challenges have increased interest in cotton production in Oklahoma.An attempt was made to understand the feasibility of growing cotton in all counties of Oklahoma.Many areas in Oklahoma have sufficient thermal conditions for cotton production.Potential cotton lint yields generally increase from northern to southern areas of the state.Abstract. With the expansion of planted area, Oklahoma is increasingly becoming a major cotton producing state in the United States (U.S.). However, the feasibility of growing cotton in all counties of Oklahoma has not been determined. In this study, a heat unit based model was used to estimate the potential cotton lint yields (PCLYs) for all 77 counties of Oklahoma using 38 years (1981-2018) of air temperature data. PCLYs were estimated for optimal (no stress) conditions. The long-term total heat units (THUs) were more than 1000°C·d in 99% of counties, an indication that many areas in Oklahoma may have conducive thermal conditions for cotton production in most years. Similar to the THUs, the PCLYs generally increased from the northern to the southern counties of the state, and long-term averages ranged from 407 to 2472 kg ha-1. About 97% of the counties achieved long-term average PCLYs of at least 1000 kg ha-1. However, the results showed significant interannual variability of the estimated PCLYs in each county over the 38-year period. Low and high PCLYs mostly coincided with years characterized by cool and warm growing seasons, respectively. Reductions of PCLY ranging from 6% to 29% were observed when planting was delayed by just one week from the optimized planting date. This indicates that cotton producers need to carefully consider planting date to maximize cotton lint yield. As THUs were the only factor considered for calculating PCLYs in this study, future research should incorporate other variables such as rainfall and heat stress to improve PCLY estimations. Keywords: Air temperature, Planting date, Soil temperature, Yield gap, Yield variability.

Agronomic and economic evaluation of irrigation strategies on cotton lint yield in Australia

2012 ◽  
Vol 63 (7) ◽  
pp. 647 ◽  
Author(s):  
Davide Cammarano ◽  
José Payero ◽  
Bruno Basso ◽  
Paul Wilkens ◽  
Peter Grace
Keyword(s):  
Simulation Model ◽  
Temporal Distribution ◽  
Economic Feasibility ◽  
Lint Yield ◽  
Cotton Production ◽  
Environmental Implications ◽  
Cotton Lint ◽  
Economic Implications ◽  
Irrigation Level

Cotton is one of the most important irrigated crops in subtropical Australia. In recent years, cotton production has been severely affected by the worst drought in recorded history, with the 2007–08 growing season recording the lowest average cotton yield in 30 years. The use of a crop simulation model to simulate the long-term temporal distribution of cotton yields under different levels of irrigation and the marginal value for each unit of water applied is important in determining the economic feasibility of current irrigation practices. The objectives of this study were to: (i) evaluate the CROPGRO-Cotton simulation model for studying crop growth under deficit irrigation scenarios across ten locations in New South Wales (NSW) and Queensland (Qld); (ii) evaluate agronomic and economic responses to water inputs across the ten locations; and (iii) determine the economically optimal irrigation level. The CROPGRO-Cotton simulation model was evaluated using 2 years of experimental data collected at Kingsthorpe, Qld The model was further evaluated using data from nine locations between northern NSW and southern Qld. Long-term simulations were based on the prevalent furrow-irrigation practice of refilling the soil profile when the plant-available soil water content is <50%. The model closely estimated lint yield for all locations evaluated. Our results showed that the amounts of water needed to maximise profit and maximise yield are different, which has economic and environmental implications. Irrigation needed to maximise profits varied with both agronomic and economic factors, which can be quite variable with season and location. Therefore, better tools and information that consider the agronomic and economic implications of irrigation decisions need to be developed and made available to growers.

Ideas and Aspirations

2021 ◽  
pp. 221-239
Author(s):  
Oscar Calvo-Gonzalez
Keyword(s):  
United States ◽  
Technological Progress ◽  
Wide Spectrum ◽  
The United States ◽  
Policy Innovation ◽  
The State ◽  
Policy Entrepreneurs ◽  
New Ideas ◽  
Practical Agenda

This chapter explores how, behind the change in economic policymaking, lies a change in the ideas of the elite. And behind the change in ideas was a relentless scanning of experience outside Spain, especially in Europe. The chapter documents how the technocrats that held increasing power in 1960s Spain consistently sought out new ideas about policymaking from Europe and the United States. They were deliberate policy entrepreneurs. Like their Western European peers, the technocrats considered a responsibility of the state to seek to advance progress for a wide spectrum of society. To pursue this objective, they considered it critical to increase efficiency and put great faith in technological progress. The chapter concludes that what truly stands out of the technocrats is that they were able to implement their practical agenda over a sustained period. There had been previous technocratic efforts to emulate European practices, sometimes from reformers that reached even higher levels of government. A long-term horizon allowed policies to evolve without unnecessary volatility, striking a balance between policy innovation and policy continuity.

scholarly journals Soil replacement combined with subsoiling improves cotton yields

2019 ◽  
Vol 2 (1) ◽  
Author(s):  
Pengcheng LI ◽  
Shulin WANG ◽  
Hong QI ◽  
Yan WANG ◽  
Qian ZHANG ◽  
...  
Keyword(s):  
Northern China ◽  
Good Alternative ◽  
Soil Tillage ◽  
Available Phosphorus ◽  
Cotton Production ◽  
Cotton Lint ◽  
Water Storage Capacity ◽  
Cotton Lint Yield ◽  
Plough Pan

Abstract Background Long-term rotary tillage has led to the deterioration of cotton production in northern China. This deterioration is due to the disturbance of topsoil, a dense plough pan at the 20–50 cm depth, and the decreased water storage capacity. A 2-yr field experiment was performed from 2014 to 2015 to explore a feasible soil tillage approach to halting the deterioration. The experiment consisted of four treatments: replacing the topsoil from the 0–15 cm layer with the subsoil from the 15–30 cm layer (T1); replacing the topsoil from the 0–20 cm layer with the subsoil from the 20–40 cm layer and subsoiling at the 40–55 cm layer (T2); replacing the topsoil from the 0–20 cm layer with the subsoil from the 20–40 cm layer and subsoiling at the 40–70 cm layer (T3); and conventional surface rotary tillage within 15 cm as the control (CK). Results The results indicated that the soil bulk densities at the 20–40 cm layer in T2 were 0.13 g·cm− 3 and 0.15 g·cm− 3 lower than those obtained from CK in 2014 and 2015, respectively. The total nitrogen (N) and the available phosphorus (P) and potassium (K) contents from the 20–40 cm layer in T2 and T3 were significantly higher than those in CK and T1. The amount of soil water stored in the 0–40 cm layer of T2 at the squaring stage of cotton was 15.3 mm and 13.4 mm greater than that in CK in 2014 and 2015, respectively, when the weather was dry. Compared with CK, T2 increased cotton lint yield by 6.1 and 10.2 percentage points in 2014 and 2015, respectively, which was due to the improved roots within the 20–60 cm layer, the greater number of bolls per plant and the higher boll weight in the T2 treatment. Conclusions The results suggested that soil replacement plus subsoiling would be a good alternative to current practices in order to break through the bottleneck constraining cotton production in northern China. Replacing the topsoil in the 0–20 cm layer with the soil from the 20–40 cm layer plus subsoiling at the 40–55 cm layer would be the most effective method.

scholarly journals Bayesian probabilistic forecasting with large-scale educational trend data: a case study using NAEP

2021 ◽  
Vol 9 (1) ◽  
Author(s):  
David Kaplan ◽  
Mingya Huang
Keyword(s):  
United States ◽  
Large Scale ◽  
Population Level ◽  
The United States ◽  
The State ◽  
Probabilistic Forecasting ◽  
Term Trend ◽  
Trend Data ◽  
Long Term Trend

AbstractOf critical importance to education policy is monitoring trends in education outcomes over time. In the United States, the National Assessment of Educational Progress (NAEP) has provided long-term trend data since 1970; at the state/jurisdiction level, NAEP has provided long-term trend data since 1996. In addition to the national NAEP, all 50 states and United States jurisdictions participate in the state NAEP assessment. Thus, NAEP provides important monitoring and forecasting information regarding population-level academic performance of relevance to national and international goals. However, an inspection of NAEP trend reports shows that relatively simple trend plots are provided; and although these plots are important for communicating general trend information, we argue that much more useful information can be obtained by adopting a Bayesian probabilistic forecasting point of view. The purpose of this paper is to provide a Bayesian probabilistic forecasting workflow that can be used with large-scale assessment trend data generally, and to demonstrate that workflow with an application to the state NAEP assessments.

scholarly journals Comparison of Air Temperature Characteristics in Forest Communities in Puszcza Borecka and in Open Space

2010 ◽  
Vol 14 (1) ◽  
pp. 135-143
Author(s):  
Katarzyna Pietras
Keyword(s):  
Solar Radiation ◽  
Air Temperature ◽  
Open Space ◽  
Thermal Conditions ◽  
Forest Communities ◽  
Temperature Characteristics ◽  
Tree Crowns

Abstract Changes in similarities of five forest communities and of open space taking place during the year were analyzed in the scope of twelve daily and monthly characteristics of air temperature. The density of tree crowns having impact on the level of solar radiation reaching the ground during the day and the level of long term nocturnal emissions is the most important factor shaping thermal conditions in the forest.

scholarly journals Relating urban development and densification to temporary changes in the air temperature in Warsaw (Poland)

2020 ◽  
Vol 142 (1-2) ◽  
pp. 513-523
Author(s):  
Tomasz Rozbicki ◽  
Małgorzata Kleniewska ◽  
Katarzyna Rozbicka ◽  
Grzegorz Majewski ◽  
Dariusz Gołaszewski
Keyword(s):  
Air Temperature ◽  
Surface Energy Balance ◽  
Thermal Conditions ◽  
Active Surface ◽  
City Centre ◽  
Heat Island ◽  
Temperature Trends ◽  
Urban Heat ◽  
The City

Abstract The assessment of the influence of urbanisation effects on air temperature trends has been widely discussed in the literature. Urbanisation affects the urban active surface energy balance, resulting in the formation of urban heat island, also observed in the Warsaw conurbation. This article presents the diversity of long-term changes in air temperature at three Warsaw meteorological stations situated in the districts of Ursynów, Okęcie and Bielany, and demonstrates changes in thermal conditions during a long-term urbanisation process. Ursynów is the station where the changes of the surrounding area were most significant among the three analysed ones and the rise in the air temperature for this station was the greatest and it was observed from 7.5 °C in the years 1961–1970 to 8.5 °C in the years 2001–2010. The diversity of air temperature between the stations depends on their location. All of them are situated within the conurbation, at some distance from the city centre but the nature of their surroundings is different. The diversity applies to all annual characteristics of air temperature: its mean, mean maximum and mean minimum values.

Roads to follow: regulating direct foreign investment

1989 ◽  
Vol 43 (4) ◽  
pp. 543-584 ◽  
Author(s):  
Simon Reich
Keyword(s):  
United States ◽  
The United States ◽  
The State ◽  
Balance Of Payments ◽  
West Germany ◽  
Foreign Firms ◽  
Foreign Competition ◽  
State Autonomy ◽  
Short Term

The United States faces a formidable and growing economic challenge from Japan. Over the last decade, the American state has characteristically responded to the loss of domestic market dominance in the manufacturing sector to foreign firms by invoking the principles of free and fair trade in order to delegitimate this foreign competition and legitimate the imposition of trade barriers designed to encourage the investment of multinational corporations (MNCs) in the United States. These tactics have largely succeeded in attracting investment and thus aided domestic employment and the balance of trade. The short-term benefits, however, have been achieved at long-term, unforeseen, undesirable economic and political costs in terms of both the balance of payments and state autonomy. Alternative state responses to the threat posed by Japanese MNCs, while consistent with principles of free trade, challenge the traditional liberal conception of the scope and domain of state behavior and provide more effective policies in achieving both short- and long-term objectives. This article draws on data relating to the treatment of subsidiaries of American automobile manufacturers by European governments with competing indigenous producers in specifying two variables critical to identifying policy alternatives: first, the degree of access granted by the state to foreign firms (limited or unlimited access) and, second, the type of support provided by the state to domestic firms (discriminatory or nondiscriminatory intervention). The analysis suggests that there are four possible policy combinations, which generally reflect the four different postwar state policies pursued by West Germany, France, Britain, and the United States. Of these four, the combination employed by West Germany has proved most effective in pursuing policies consistent with liberal trade principles while reconciling short-term employment and fiscal goals with the broader long-term objectives of sustaining state autonomy and balance-of-payments surpluses in the face of foreign competition. British policies, which have consistently proved the most ineffective, have sacrificed long-term objectives for short-term ones. As a result of structural changes during the 1970s, the American state's chosen policy combination was altered and now replicates the traditional British formula. The United States therefore risks comparable economic and political consequences.

scholarly journals Preface

2007 ◽  
Vol 16 (1) ◽  
pp. v-ix ◽  
Author(s):  
Alexei Elfimov ◽  
Ullrich Kockel
Keyword(s):  
United States ◽  
South Africa ◽  
Great Britain ◽  
The Netherlands ◽  
The United States ◽  
The State ◽  
Comparative Approach ◽  
The Relationship

As the new century unfolds, it becomes increasingly clear that contexts in which anthropology is practised as an established discipline, scholarly enterprise, applied endeavour, profession and intellectual pursuit keep changing, altering and transforming. The general aim in putting together this collection of essays was to test the state and condition of the relationship between anthropology and society in a number of countries where anthropological discourses and ethnographic activity have had a tangible presence in academia and beyond. Adopting a comparative approach – anthropology’s long-term companion – that we hoped would once again allow us to highlight where things have developed differently and where they seemed the same (or indeed were only equally illusorily), we asked leading practitioners from Austria, Brazil, France, Great Britain, the Netherlands, Russia, South Africa and the United States to ponder the same, rather broadly posed, set of questions.

Applied Heat Transfer in the Development of the New Wind Chill Temperature Chart

2004 ◽  
Author(s):  
Maurice Bluestein
Keyword(s):  
Heat Transfer ◽  
Air Temperature ◽  
The United States ◽  
Wind Chill ◽  
Wind Speeds ◽  
Clear Night ◽  
Air Temperatures ◽  
Tissue Resistance ◽  
The U.S

In November, 2001, the national weather services of the United States and Canada, recognizing inaccuracies in the original, adopted a revised Wind Chill Temperature (WCT) chart. This revision was developed by the authors under a mandate from a joint action group for temperature indicies (JAG/TI) formed by the U.S. Office of the Federal Coordinator for Meteorology. This new chart provides, for a given air temperature and recorded wind speed, that air temperature, the WCT, which would result in the same rate of heat loss from exposed human skin in still air. Values of the WCT are given for a range of air temperatures from −45°F to 40°F and a range of wind speeds from 5 mph to 60 mph. For Canada, the ranges are from −50°C to 10°C and 10 km/hr to 80 km/hr. The new chart was developed using principles of heat transfer, including conduction, forced convection and radiation. Skin tissue resistance was obtained from human studies. This paper describes the application of these principles and will show how these same principles have been used to demonstrate the errors in the original chart developed over 60 years ago by our military in Antarctica and adopted by the U.S. Weather Service in 1973. As was the case for the original chart, a clear night sky has been assumed, thus ignoring any direct solar radiation that would otherwise tend to elevate the WCT. The new chart is unlikely to be the final version long term and this paper will also discuss possible future modifications.

scholarly journals Characterization of the Wine Grape Thermohydrological Conditions in the Tropical Brazilian Growing Region: Long-Term and Future Assessments

ISRN Agronomy ◽  
2014 ◽  
Vol 2014 ◽  
pp. 1-14 ◽  
Author(s):  
Antônio Heriberto de Castro Teixeira ◽  
Jorge Tonietto ◽  
Giuliano Elias Pereira ◽  
Fernando Braz Tangerino Hernandez
Keyword(s):  
Air Temperature ◽  
Land Use Changes ◽  
Thermal Conditions ◽  
Weather Data ◽  
Emission Scenarios ◽  
Wine Quality ◽  
Wine Production ◽  
More Care

Over the last years, Brazil has appeared among the new tropical wine producing countries. The joined effect of rising air temperature and decreasing precipitation makes it important to quantify the trend of the thermohydrological conditions of the commercial vineyards. The aims of the current research were to classify and delimit these conditions for the winemaking processes under different time scenarios in the Brazilian Northeastern region. Bioclimatic indicators were used together with long-term weather data and projections of the IPCC emission scenarios under simulated pruning dates. The results showed that decreasing of precipitation should be good for wine production when irrigation water is available, but rising air temperature will affect the wine quality and stability mainly for pruning done from November to March. The best pruning periods are around May for any time scenario considered. In general, more care should be taken for pruning happening in other periods of the year, regarding the effect of increasing thermal conditions on wine quality. The classification and delimitation done, joined with other ecological characteristics, are important for a rational planning of the commercial wine production expansion, mainly in situations of climate and land use changes together with rising water competition.

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