scholarly journals Alfalfa Rotation Strategy and Soil Type Influence Soil Characteristics and Replanted Alfalfa Yield in the Irrigated Semiarid, Subtropical Southwestern USA

Crops ◽  
2021 ◽  
Vol 1 (3) ◽  
pp. 141-152
Author(s):  
Leonard M. Lauriault ◽  
Murali K. Darapuneni
Keyword(s):  
Soil Fertility ◽  
Soil Type ◽  
Triticum Aestivum L ◽  
Agricultural Science ◽  
State University ◽  
Science Center ◽  
New Mexico State University ◽  
Southwestern Usa ◽  
Sorghum Sudangrass ◽  
Rotation Strategy

Alfalfa (Medicago sativa L.) establishment failure is often attributed to autotoxicity when alfalfa is reseeded shortly after termination of the previous alfalfa stand, but renovation/rotation strategies for irrigated semiarid, subtropical environments have not been studied. Two identical studies were initiated at the New Mexico State University Rex E. Kirksey Agricultural Science Center at Tucumcari, NM, USA to compare continuous alfalfa (ALF), a single year of rotation to sorghum-sudangrass (SS1; Sorghum bicolor × S. sudanense (Piper) Stapf), two years of rotation with sorghum-sudangrass (SS2), and winter wheat forage (Triticum aestivum L.) followed by a single season of sorghum-sudangrass (WW/SS). Soil type and renovation/rotation strategy may influence soil fertility prior to replanting alfalfa, but soil fertility did not appear to influence alfalfa re-establishment or first production year yields. With a Test x Rotation interaction due to differences between tests for WW/SS for first production year yield after September alfalfa replanting, the main effect of Rotation was significant for yield (6.43AB, 5.3B0, 6.92A, and 3.54C Mg ha−1 for ALF, SS1, SS2, and WW/SS, respectively; 5% LSD = 1.22). Alfalfa stand destruction and replanting with no intervening crop rotation may be feasible in sandy soils with irrigation in the semiarid, subtropical southwestern USA and similar environments.

scholarly journals A Comparison of Pearl Millet and Sorghum–Sudangrass Pastures during the Frost-Prone Autumn for Growing Beef Cattle in Semiarid Region

Agriculture ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 541
Author(s):  
Leonard M. Lauriault ◽  
Leah H. Schmitz ◽  
Shad H. Cox ◽  
Eric J. Scholljegerdes
Keyword(s):  
Weight Gain ◽  
Beef Cattle ◽  
Pearl Millet ◽  
Nutritive Value ◽  
Agricultural Science ◽  
Forage Yield ◽  
Hydrocyanic Acid ◽  
Science Center ◽  
Forage Crops ◽  
Sorghum Sudangrass

Sorghum–sudangrass (Sorghum bicolor × S. sudanense (Piper) Stapf.) and pearl millet (Pennisetum glaucum (L.) R. Br.) provide adequate nutritive value for growing beef cattle; however, unlike pearl millet, sorghum–sudangrass produces hydrocyanic acid (which is toxic to livestock) when frosted. Forage yield, nutritive value, and weight gain of growing cattle grazing sorghum–sudangrass and pearl millet were compared during the frost-prone autumns of 2013 and 2014, at New Mexico State University’s Rex E. Kirksey Agricultural Science Center in Tucumcari, NM USA, in randomized complete block designs each year with two replicates. No differences existed between pearl millet and sorghum–sudangrass forage yield, although there was a year–forage interaction for fiber-based nutritive value components because of maturity differences across years between the forages when freeze-killed. Pearl millet allowed for extending grazing of available forage for an additional 14 and 24 d in 2013 and 2014, respectively, compared to sorghum–sudangrass during the frost-prone autumn periods. During that period, when sorghum forages produce potentially toxic levels of hydrocyanic acid, animals grazing pearl millet accumulated an additional average of 94.9 kg live-weight gain ha−1 (p < 0.001). These factors afford producers an opportunity to increase returns on the similar investments of establishing and managing warm-season annual forage crops each year, and allow more time to stockpile cool-season perennial and annual forages for winter and early spring grazing, or to reduce hay feeding.

scholarly journals Relationship between Relative Maturity and Grain Yield of Maize (Zea mays L.) Hybrids in Northwest New Mexico for the 2003–2019 Period

Agriculture ◽  
2020 ◽  
Vol 10 (7) ◽  
pp. 290
Author(s):  
Koffi Djaman ◽  
Curtis Owen ◽  
Margaret M. West ◽  
Samuel Allen ◽  
Komlan Koudahe ◽  
...  
Keyword(s):  
New Mexico ◽  
Grain Yield ◽  
Sprinkler Irrigation ◽  
Growing Season ◽  
Climatic Conditions ◽  
Agricultural Science ◽  
Production Optimization ◽  
Science Center ◽  
Early Season ◽  
Climate Conditions

The highly variable weather under changing climate conditions affects the establishment and the cutoff of crop growing season and exposes crops to failure if producers choose non-adapted relative maturity that matches the characteristics of the crop growing season. This study aimed to determine the relationship between maize hybrid relative maturity and the grain yield and determine the relative maturity range that will sustain maize production in northwest New Mexico (NM). Different relative maturity maize hybrids were grown at the Agricultural Science Center at Farmington ((Latitude 36.69° North, Longitude 108.31° West, elevation 1720 m) from 2003 to 2019 under sprinkler irrigation. A total of 343 hybrids were grouped as early and full season hybrids according to their relative maturity that ranged from 93 to 119 and 64 hybrids with unknown relative maturity. The crops were grown under optimal management condition with no stress of any kind. The results showed non-significant increase in grain yield in early season hybrids and non-significant decrease in grain yield with relative maturity in full season hybrids. The relative maturity range of 100–110 obtained reasonable high grain yields and could be considered under the northwestern New Mexico climatic conditions. However, more research should target the evaluation of different planting date coupled with plant population density to determine the planting window for the early season and full season hybrids for the production optimization and sustainability.

Do engineering master’s students know what they don’t know?

2015 ◽  
Vol 64 (1/2) ◽  
pp. 36-57 ◽  
Author(s):  
Paula C Johnson ◽  
Jennifer E. Simonsen
Keyword(s):  
Information Seeking ◽  
Critical Incident ◽  
State University ◽  
Electronic Information ◽  
Master's Students ◽  
Web Based ◽  
Content Type ◽  
New Mexico State University ◽  
Scholarly Article ◽  
Materials Used

Purpose – The purpose of this study was to determine whether engineering master’s students at a medium-sized university use library-provided abstracting and indexing (A&I) services (e.g. Compendex), and if they do, to what extent, in what manner and for what purposes. Design/methodology/approach – A mixed methodology approach was used to explore electronic information-seeking patterns of engineering master’s students at New Mexico State University. Usage statistics, a focus group and a Web-based survey were used, the latter composed of 17 questions using a critical incident approach and direct questions to probe: reasons for and method of search, types of materials used (with relative frequencies), means of obtaining materials and evaluations of the usefulness of five library-provided A&I services. Findings – Only 15 per cent of respondents used a subscription A&I service such as Compendex when searching specific terms. The majority of sources used were located through known term searches, and master’s learned of these information resources through article citations or conversations with colleagues. Half the respondents reported using Google Scholar to find the last scholarly article they had read. Engineering master’s students – similar to practicing engineers – evaluate the costs associated with obtaining information, and may “satisfice”. Even so, students expressed interest in increasing their knowledge of skills and strategies to find worthwhile electronic information. Originality/value – This study sheds light on engineering master’s students’ use of A&I services, and examines their perceptions of five of these services commonly provided by academic libraries.

scholarly journals Environmental monitoring of radioactive and non-radioactive constituents in the vicinity of WIP

2011 ◽  
Vol 1 (1) ◽  
pp. 269-276
Author(s):  
P. Thakur ◽  
J. Monk ◽  
J. L. Conca
Keyword(s):  
Environmental Monitoring ◽  
Monitoring Program ◽  
Department Of Energy ◽  
Disposal Site ◽  
State University ◽  
Chemical Contaminants ◽  
The Public ◽  
New Mexico State University ◽  
The Us ◽  
Waste Repositories

Abstract The Waste Isolation Pilot Plant (WIPP), a US Department of Energy (DOE) facility, is a deep geologic transuranic waste disposal site designed for the safe disposal of transuranic (TRU) wastes generated from the US defense program. Monitoring is a key component of the development and operation of any nuclear repository and is important to the WIPP performance assessment. Initial concerns over the release of radioactive and chemical contaminants from the WIPP led to various monitoring programs, including the independent, academic-based WIPP environmental monitoring (WIPP-EM) program conducted by the New Mexico State University (NMSU) Carlsbad Environmental Monitoring and Research Center (CEMRC) located in Carlsbad, NM. The mission of CEMRC is to develop and implement an independent health and environmental monitoring program in the vicinity of WIPP and make the results easily accessible to the public and all interested parties. Under the WIPP-EM program constituents monitored include: (1) selected radionuclides, elements, and ions of interest in air, soil, vegetation, drinking water, surface water and sediment from within a 100-mile radius of WIPP as well as in the air exiting the WIPP exhaust shaft, and (2) internally deposited radionuclides in the citizenry living within a 100-mile radius of WIPP. This article presents an evaluation of more than tens years of environmental monitoring data that informed the public that there is no evidence of increases in radiological contaminants in the region that could be attributed to releases from the WIPP. Such an extensive monitoring program and constant public engagement is an ideal model for all nuclear waste repositories anywhere in the world.

scholarly journals Geothermal application feasibility study for the New Mexico State University campus. Technical report

1978 ◽  
Author(s):  
N.N. Gunaji ◽  
E.F. Thode ◽  
L. Chaturvedi ◽  
A. Walvekar ◽  
L. LaFrance ◽  
...  
Keyword(s):  
New Mexico ◽  
Feasibility Study ◽  
State University ◽  
University Campus ◽  
New Mexico State University ◽  
Technical Report
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