scholarly journals Beyond 2020, Vision of the Future: Selected Papers from the Sixth Decennial National Irrigation Symposium

2021 ◽  
Vol 64 (5) ◽  
pp. 1449-1458
Author(s):  
Freddie R. Lamm ◽  
Michael D. Dukes ◽  
Kenneth C. Stone ◽  
Brent Q. Mecham
Keyword(s):  
Water Supply ◽  
Irrigation Management ◽  
Irrigation Scheduling ◽  
Research Progress ◽  
Humid Region ◽  
Special Collection ◽  
The Future ◽  
Pressurized Irrigation ◽  
Irrigation Research ◽  
The U.S

HighlightsASABE/IA 6th National Irrigation Symposium includes 80 papers, with 36 introduced here in this Special Collection.Papers include current irrigation research about ET, management, turf systems, technology, humid region, water supply.Irrigation in the U.S. is growing more rapidly in humid regions, and pressurized irrigation continues to grow in usage.There has been much progress in irrigation science in the last decade, and the vision of the future looks bright.Abstract. This article introduces the ASABE Special Collection associated with the 6th Decennial National Irrigation Symposium: Beyond 2020, Vision of the Future. This U.S. symposium, jointly sponsored by ASABE and the Irrigation Association in December 2021, was postponed from 2020 due to the pandemic and consists of approximately 80 presentations, of which 36 were accepted as journal articles for this Special Collection. Irrigated land area appears to be growing slightly in the U.S. but is shifting geographically somewhat toward humid regions. Pressurized irrigation continues to grow, and gravity-fed irrigation continues to decline. Competition for stressed water resources among diverse water users remains great, and smaller numbers of irrigation scientists are available to meet the informational needs. Improved ability to acquire, assess, and use water and crop information helps to meet these challenges. This article discusses irrigation research progress in evapotranspiration (ET), irrigation management, turf systems, sensors and technologies, irrigation strategies in the humid region, and water supply. Challenges and opportunities continue to exist for irrigation in the U.S., but progress in the last decade has been steady, and a good vision for the future of irrigation beyond 2020 is anticipated. Keywords: Evapotranspiration, Irrigation, Irrigation management, Irrigation scheduling, Irrigation systems, Turf and landscape irrigation.

Citrus Irrigation Management

EDIS ◽  
2017 ◽  
Vol 2017 (5) ◽  
Author(s):  
Davie Mayeso Kadyampakeni ◽  
Kelly T. Morgan ◽  
Mongi Zekri ◽  
Rhuanito Ferrarezi ◽  
Arnold Schumann ◽  
...  
Keyword(s):  
Water Stress ◽  
Physiological Activity ◽  
Irrigation Management ◽  
Fruit Size ◽  
Irrigation Scheduling ◽  
Leaf Expansion ◽  
Tree Canopy ◽  
Limiting Factor ◽  
Irrigation Frequency ◽  
Citrus Production

Water is a limiting factor in Florida citrus production during the majority of the year because of the low water holding capacity of sandy soils resulting from low clay and the non-uniform distribution of the rainfall. In Florida, the major portion of rainfall comes in June through September. However, rainfall is scarce during the dry period from February through May, which coincides with the critical stages of bloom, leaf expansion, fruit set, and fruit enlargement. Irrigation is practiced to provide water when rainfall is not sufficient or timely to meet water needs. Proper irrigation scheduling is the application of water to crops only when needed and only in the amounts needed; that is, determining when to irrigate and how much water to apply. With proper irrigation scheduling, yield will not be limited by water stress. With citrus greening (HLB), irrigation scheduling is becoming more important and critical and growers cannot afford water stress or water excess. Any degree of water stress or imbalance can produce a deleterious change in physiological activity of growth and production of citrus trees.  The number of fruit, fruit size, and tree canopy are reduced and premature fruit drop is increased with water stress.  Extension growth in shoots and roots and leaf expansion are all negatively impacted by water stress. Other benefits of proper irrigation scheduling include reduced loss of nutrients from leaching as a result of excess water applications and reduced pollution of groundwater or surface waters from the leaching of nutrients. Recent studies have shown that for HLB-affected trees, irrigation frequency should increase and irrigation amounts should decrease to minimize water stress from drought stress or water excess, while ensuring optimal water availability in the rootzone at all times.

The Future of Global Great Power Competition after the Coronavirus

2020 ◽  
pp. 79-92
Author(s):  
Burhanettin Duran
Keyword(s):  
World War Ii ◽  
International System ◽  
Radical Change ◽  
Economic Effects ◽  
World War ◽  
Health Security ◽  
Self Sufficiency ◽  
The Future ◽  
Policy Agendas ◽  
The U.S

Due to the COVID-19 pandemic, the domestic and foreign policy agendas of all countries have been turned upside down. The pandemic has brought new problems and competition areas to states and to the international system. While the pandemic politically calls to mind the post-World War II era, it can also be compared with the 2008 crisis due to its economic effects such as unemployment and the disruption of global supply chains. A debate immediately began for a new international system; however, it seems that the current international system will be affected, but will not experience a radical change. That is, a new international order is not expected, while disorder is most likely in the post-pandemic period. In an atmosphere of global instability where debates on the U.S.-led international system have been worn for a while, in the post-pandemic period states will invest in self-sufficiency and redefine their strategic areas, especially in health security. The decline of U.S. leadership, the challenging policies of China, the effects of Chinese policies on the U.S.-China relations and the EU’s deepening crisis are going to be the main discussion topics that will determine the future of the international system.

Facts Between Pictographs and Photographs in Lester Beall's Rural Electrification Posters, 1937-1941

2015 ◽  
Vol 60 (1) ◽  
pp. 17-38
Author(s):  
Michael J. Golec
Keyword(s):  
Social Reality ◽  
Rural Electrification ◽  
Art And Design ◽  
Photographic Images ◽  
Governmental Agencies ◽  
Works Of Art ◽  
The Future ◽  
The U.S

In analysing Lester Beall's posters for the U.S. government between 1937-1941, Michael Golec demonstrates the twofold character of facts in art and design appearing even when they are applied to guarantee distinct messages. Commissioned by the governmental agencies to develop a series of posters to increase the electrification of rural farms, Beall introduces pictograms in his first series to represent electrification as “facts of the future.” Its simple forms facilitate the travelling of this facts without loss of their integrity. The same holds true for the use of photographic images for the second campaign of 1939. Following the revaluation of photography as a means for the documentation of social reality, as represented by the FSA photographers under the guidance of Roy Stryker, the medium served here as the authentication of facts. Golec holds, that Beall by reducing the complexity of the photographic images, to create a pictorial integrity of his posters, even despite of the use of a seemingly documentary medium, reinforces the ambivalent factual character of the pictures. So, paradoxically by heightening the communicative character of the design and hence stressing the idea of facts as integral realities outside of artworks, Beall's posters reveal the ambiguous character of pictorial facts creating their own specific qualities. Golec concludes, that facts in works of art and design have a twofold character resulting from their belonging to different spaces, which although meant to accomplish and address different facts, inevitably travel, overlap and bleed into each other. Thus oddly these facts refer or represent reality and simultaneously are a thing made (factum) that present and hold their own pictorial reality.

Preparing the Pipeline: The U.S. Cyber Workforce for the Future

2012 ◽  
Author(s):  
David J. Kay ◽  
Terry J. Pudas ◽  
Brett Young
Keyword(s):  
The Future ◽  
The U.S

scholarly journals Irrigation Scheduling with Soil Gas Diffusivity as a Decision Tool to Mitigate N2O Emissions from a Urine-Affected Pasture

Agriculture ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 443
Author(s):  
Camille Rousset ◽  
Timothy J. Clough ◽  
Peter R. Grace ◽  
David W. Rowlings ◽  
Clemens Scheer
Keyword(s):  
Irrigation Management ◽  
Irrigation Treatment ◽  
Irrigation Scheduling ◽  
Soil Gas ◽  
N2o Emissions ◽  
Irrigation Frequency ◽  
Water Demands ◽  
Gas Diffusivity ◽  
Matter Production ◽  
Access To Water

Pastures require year-round access to water and in some locations rely on irrigation during dry periods. Currently, there is a dearth of knowledge about the potential for using irrigation to mitigate N2O emissions. This study aimed to mitigate N2O losses from intensely managed pastures by adjusting irrigation frequency using soil gas diffusivity (Dp/Do) thresholds. Two irrigation regimes were compared; a standard irrigation treatment based on farmer practice (15 mm applied every 3 days) versus an optimised irrigation treatment where irrigation was applied when soil Dp/Do was ≈0.033 (equivalent to 50% of plant available water). Cow urine was applied at a rate of 700 kg N ha−1 to simulate a ruminant urine deposition event. In addition to N2O fluxes, soil moisture content was monitored hourly, Dp/Do was modelled, and pasture dry matter production was measured. Standard irrigation practices resulted in higher (p = 0.09) cumulative N2O emissions than the optimised irrigation treatment. Pasture growth rates under treatments did not differ. Denitrification during re-wetting events (irrigation and rain) contributed to soil N2O emissions. These results warrant further modelling of irrigation management as a mitigation option for N2O emissions from pasture soils, based on Dp/Do thresholds, rainfall, plant water demands and evapotranspiration.

Don’t Take Canberra for Granted: The Future of the U.S.-Australian Alliance

Orbis ◽  
2004 ◽  
Vol 48 (3) ◽  
pp. 465-478
Author(s):  
Michael Horowitz
Keyword(s):  
The Future ◽  
The U.S

scholarly journals Is China Trying to Push the U.S. out of East Asia?

2015 ◽  
Vol 01 (01) ◽  
pp. 59-84 ◽  
Author(s):  
Dong Wang
Keyword(s):  
United States ◽  
East Asia ◽  
International System ◽  
The United States ◽  
Willingness To Participate ◽  
Monroe Doctrine ◽  
Western Discourse ◽  
The Future ◽  
Regional Order ◽  
The U.S

One of the key questions for understanding the future trajectory of regional order is whether or not China is trying to push the United States out of East Asia and build a China-dominated regional order. Some Western analysts accuse China of pursuing the Monroe Doctrine and excluding the United States from the region. This article argues that the Western discourse of China practicing the Monroe Doctrine is a misplaced characterization of China's behavior. Rather than having intention of pushing the United States out of East Asia and build a China-dominated regional order, China is pursuing a hedging strategy that aims at minimizing strategic risks, increasing freedom of action, diversifying strategic options, and shaping the U.S.' preferences and choices. This can be exemplified in five issue areas: China's ties with the Association of Southeast Asian Nations (ASEAN), the Shanghai Cooperation Organization (SCO) and China's foreign policy activism, China-Russia relations, the Conference on Interactions and Confidence-Building Measures in Asia (CICA) and the New Asian Security Concept, as well as China-U.S. relations. Beijing has explicitly acknowledged the U.S. predominance in the international system and reiterated its willingness to participate in and reform the existing system. It concludes by suggesting that, for a more peaceful future to emerge in East Asia, the United States and China, as an incumbent power and a rising power, will have to accommodate each other, and negotiate and renegotiate the boundaries of their relative power, as well as their respective roles in the future regional order where Beijing and Washington would learn to share responsibilities and leadership.

Use of geographic information systems and remote sensing as automated tool for variable rate irrigation prescriptions

2019 ◽  
Author(s):  
◽  
Anh Thi Tuan Nguyen
Keyword(s):  
Remote Sensing ◽  
Real Time ◽  
Regression Models ◽  
Field Data ◽  
Irrigation Management ◽  
Irrigation Scheduling ◽  
Crop Growth ◽  
Variable Rate ◽  
Water Application ◽  
Center Pivot

[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT REQUEST OF AUTHOR.] Economic as well as water shortage pressure on agricultural use of water has placed added emphasis on efficient irrigation management. Center pivot technology has made great improvement with variable rate irrigation (VRI) technology to vary water application spatially and temporally to maximize the economic and environmental return. Proper management of VRI systems depends on correctly matching the pivot application to specific field temporal and areal conditions. There is need for a tool to accurately and inexpensively define dynamic management zones, to sense within-field variability in real time, and control variable rate water application so that producers are more willing to adopt and utilize the advantages of VRI systems. This study included tests of the center pivot system uniformity performance in 2014 at Delta Research Center in Portageville, MO. The goal of this research was to develop MOPivot software with an algorithm to determine unique management areas under center pivot systems based on system design and limitations. The MOPivot tool automates prescriptions for VRI center pivot based on non-uniform water needs while avoiding potential runoff and deep percolation. The software was validated for use in real-time irrigation management in 2018 for VRI control system of a Valley 8000 center pivot planted to corn. The water balance model was used to manage irrigation scheduling. Field data, together with soil moisture sensor measurement of soil water content, were used to develop the regression model of remote sensing-based crop coefficient (Kc). Remote sensing vegetation index in conjunction with GDD and crop growth stages in regression models showed high correlation with Kc. Validation of those regression models was done using Centralia, MO, field data in 2016. The MOPivot successfully created prescriptions to match system capacity of the management zone based on system limitations for center pivot management. Along with GIS data sources, MOPivot effectively provides readily available graphical prescription maps, which can be edited and directly uploaded to a center pivot control panel. The modeled Kc compared well with FAO Kc. By combining GDD and crop growth in the models, these models would account for local weather conditions and stage of crop during growing season as time index in estimating Kc. These models with Fraction of growth (FrG) and cumulative growing degree days (cGDD) had a higher coefficient of efficiency, higher Nash-Sutcliffe coefficient of efficiency and higher Willmott index of agreement. Future work should include improvement in the MOPivot software with different crops and aerial remote sensing imagery to generate dynamic prescriptions during the season to support irrigation scheduling for real-time monitoring of field conditions.

scholarly journals All Out Lean

2016 ◽  
Vol 138 (01) ◽  
pp. 30-35 ◽  
Author(s):  
Gary Cowger
Keyword(s):  
Continuous Improvement ◽  
Lean Manufacturing ◽  
Continuous Monitoring ◽  
Manufacturing Industry ◽  
Lean Implementation ◽  
The Future ◽  
The U.S

This article highlights advantages of Lean Manufacturing in the manufacturing industry. The U.S. Bureau of Census survey shows that leaner the company, the faster it grows and the more profitable, productive, and innovative it becomes. It is a constellation of interrelated processes that improve productivity and reduce waste through continuous monitoring, evaluation, and improvement. The successful results of lean implementation have shown that workers are going to have to take more responsibility for outcomes, and managers are going to have to treat workers like partners. However, lean brings out the skepticism in many engineers and owners of small- and medium-sized businesses. It takes a lot to convince them to invest the time and money needed to transform even a modest factory into a lean operation. Lean has proven to be a philosophy of continuous improvement, as learning how to expose and fix problems creates sustainable advantages that are expected to continue in the future.

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