The USDA‐Agricultural Research Service's Long Term Agro‐ecosystems Walnut Gulch Experimental Watershed ( WGEW ), Arizona, USA

2021 ◽  
Author(s):  
David C. Goodrich ◽  
Philip Heilman ◽  
Mark Nearing ◽  
Mary Nichols ◽  
Russ L. Scott ◽  
...  
Keyword(s):  
Agricultural Research ◽  
Walnut Gulch ◽  
Usda Agricultural Research

scholarly journals Presence of Longitudinal Roll Structures during Synoptic Forced Conditions in Complex Terrain

Atmosphere ◽  
2021 ◽  
Vol 12 (6) ◽  
pp. 737
Author(s):  
Cory M. Payne ◽  
Jeffrey E. Passner ◽  
Robert E. Dumais ◽  
Abdessattar Abdelkefi ◽  
Christopher M. Hocut
Keyword(s):  
Boundary Layer ◽  
Agricultural Research ◽  
Wrf Model ◽  
Flow Characteristics ◽  
Critical Threshold ◽  
Department Of Agriculture ◽  
Synoptic Conditions ◽  
Lee Waves ◽  
Lee Wave ◽  
Usda Agricultural Research

To investigate synoptic interactions with the San Andres Mountains in southern New Mexico, the Weather Research and Forecasting (WRF) model was used to simulate several days in the period 2018–2020. The study domain was centered on the U.S. Department of Agriculture (USDA) Agricultural Research Service’s Jornada Experimental Range (JER) and the emphasis was on synoptic conditions that favor strong to moderate winds aloft from the southwest, boundary layer shear, a lack of moisture (cloud coverage), and modest warming of the surface. The WRF simulations on these synoptic days revealed two distinct regimes: lee waves aloft and SW-to-NE oriented Longitudinal Roll Structures (LRS) that have typical length scales of the width of the mountain basin in the horizontal and the height of the boundary layer (BL) in the vertical. Analysis of the transitional periods indicate that the shift from the lee wave to LRS regime occurs when the surface heating and upwind flow characteristics reach a critical threshold. The existence of LRS is confirmed by satellite observations and the longitudinal streak patterns in the soil of the JER that indicate this is a climatologically present BL phenomenon.

scholarly journals Big Benefits from Experimental Watersheds

Eos ◽  
2021 ◽  
Vol 102 ◽  
Author(s):  
Terri Cook
Keyword(s):  
Land Management ◽  
Agricultural Research ◽  
Conservation Practices ◽  
Term Study ◽  
Long Term Study ◽  
Global Land ◽  
Study Sites ◽  
Management And Conservation ◽  
Experimental Watersheds

Scientific insights from the Agricultural Research Service’s long-term study sites underpin dozens of models and research methods that guide global land management and conservation practices.

scholarly journals Monitoring growth of Uttis (Alnus nepalensis) at a plantation cite at Dhankuta, Nepal

1970 ◽  
Vol 15 (2) ◽  
pp. 19-23
Author(s):  
T. P. Barakoti
Keyword(s):  
Agricultural Research ◽  
Growth Monitoring ◽  
Research Station ◽  
Growth Modelling ◽  
Annual Increment ◽  
Permanent Sample Plots ◽  
Alnus Nepalensis ◽  
Breast Height ◽  
Growing Environment

A long-term growth monitoring experiment on Uttis (Alnus nepalensis) was conducted in the permanent sample plots of the Agricultural Research Station (ARS) Pakhribas, Dhankuta for 10 years (1992-2001). The average annual increment was diameter at breast height 2.14 cm in 8th year, and was 0.13 cm at 16th year of planting. The trees grew 44 cm to 130 cm per year irrespective of the age. The highest growth rate correspondend with higher rainfall during summer (March-April). Estimated biomass of stem and branches increased by 2-2.5 times within the 10 years period. Thinning and felling every year indicated need for timely management of the plantation to provide better growing environment. The data would be useful for growth modelling and proper management of Uttis plantation in Nepal . Key words: Nepalese alder vs Uttis, height, diameter, biomass, Pakhribas. Banko Janakari Vol.15(2) 2005 pp19-23

scholarly journals Process of formulating USDA's Expanded Flavonoid Database for the Assessment of Dietary intakes: a new tool for epidemiological research

2015 ◽  
Vol 114 (3) ◽  
pp. 472-480 ◽  
Author(s):  
Seema A. Bhagwat ◽  
David B. Haytowitz ◽  
Shirley I. Wasswa-Kintu ◽  
Pamela R. Pehrsson
Keyword(s):  
Health Effects ◽  
Agricultural Research ◽  
Epidemiological Studies ◽  
Dietary Intakes ◽  
Flavonoid Content ◽  
Flavonoid Compounds ◽  
Dietary Flavonoid ◽  
Usda Agricultural Research ◽  
Agricultural Research Service

The scientific community continues to be interested in potential links between flavonoid intakes and beneficial health effects associated with certain chronic diseases such as CVD, some cancers and type 2 diabetes. Three separate flavonoid databases (Flavonoids, Isoflavones and Proanthocyanidins) developed by the USDA Agricultural Research Service since 1999 with frequent updates have been used to estimate dietary flavonoid intakes, and investigate their health effects. However, each of these databases contains only a limited number of foods. The USDA has constructed a new Expanded Flavonoids Database for approximately 2900 commonly consumed foods, using analytical values from their existing flavonoid databases (Flavonoid Release 3.1 and Isoflavone Release 2.0) as the foundation to calculate values for all the twenty-nine flavonoid compounds included in these two databases. Thus, the new database provides full flavonoid profiles for twenty-nine predominant dietary flavonoid compounds for every food in the database. Original analytical values in Flavonoid Release 3.1 and Isoflavone Release 2.0 for corresponding foods were retained in the newly constructed database. Proanthocyanidins are not included in the expanded database. The process of formulating the new database includes various calculation techniques. This article describes the process of populating values for the twenty-nine flavonoid compounds for every food in the dataset, along with challenges encountered and resolutions suggested. The new expanded flavonoid database released on the Nutrient Data Laboratory's website would provide uniformity in estimations of flavonoid content in foods and will be a valuable tool for epidemiological studies to assess dietary intakes.

Farmers' role in sustainable agriculture research

1990 ◽  
Vol 5 (4) ◽  
pp. 178-182 ◽  
Author(s):  
William Lockeretz ◽  
Molly D. Anderson
Keyword(s):  
Sustainable Agriculture ◽  
Agricultural Research ◽  
Dominant Role ◽  
Full Range ◽  
System Level ◽  
Component Level ◽  
Versus System ◽  
Level Versus ◽  
Publicly Supported

AbstractInvolvement of farmers in sustainable agricultural research can have important benefits, since farmers originated many sustainable agriculture innovations and can contribute a valuable perspective different from that of researchers. However, this does not mean, as is sometimes said, that all kinds of sustainable agricultural research necessarily should give farmers a major role—perhaps the dominant role—in choosing topics and overseeing the work. This belief overlooks the fact that farmers are just one of many groups that publicly supported research is supposed to serve and that their interests do not by themselves embody the full range of goals that sustainable agriculture tries to achieve. Moreover, although farmers can bring valuable insights to research, these alone will not be enough to insure that a sustainable agriculture research program has an appropriate mix of applied versus basic, short-term versus long-term, and component-level versus system-level studies.

USDA Agricultural Research Service creates Nutrient Uptake and Outcome Network (NUOnet)

2016 ◽  
Vol 71 (6) ◽  
pp. 147A-148A ◽  
Author(s):  
J. A. Delgado ◽  
S. Weyers ◽  
C. Dell ◽  
D. Harmel ◽  
P. Kleinman ◽  
...  
Keyword(s):  
Nutrient Uptake ◽  
Agricultural Research ◽  
Usda Agricultural Research ◽  
Agricultural Research Service ◽  
Research Service

Support for Long‐Term Agricultural Research

1991 ◽  
Vol 83 (1) ◽  
Author(s):  
Thomas J. Army ◽  
W. Doral Kemper
Keyword(s):  
Agricultural Research

Opening address

1985 ◽  
Vol 310 (1144) ◽  
pp. 147-150
Keyword(s):  
New Technologies ◽  
Agricultural Research ◽  
Science And Engineering ◽  
Food Industries ◽  
Advisory Services ◽  
New Ideas ◽  
Post War ◽  
New Situation ◽  
Opening Address

Science and engineering have contributed enormously to the post-war success of Britain’s agricultural and food industries. In particular the fruits of agricultural research have been taken up by an industry that has demonstrated its remarkable willingness to apply quickly new ideas emanating from the laboratory, an application often accomplished with help from the advisory services. The outcome is only too apparent. We now have surpluses of many temperate foods and feeds on a huge scale and such surpluses have never before been experienced in Europe. We are facing long-term problems of oversupply which no government in this country, and few governments elsewhere, have had to face before. This new situation presents serious challenges to and opportunities for the agricultural and food industries. It forms a backcloth to these discussions on the contribution of the new technologies to the agricultural and food industries in the 1990s and beyond.

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