scholarly journals Spatial Distribution of Nitrogen on Grazed Karst Landscapes

2001 ◽  
Vol 1 ◽  
pp. 809-813 ◽  
Author(s):  
Douglas G. Boyer ◽  
Ghiath A. Alloush
Keyword(s):  
Best Management Practices ◽  
Management Practices ◽  
Livestock Grazing ◽  
Shallow Aquifer ◽  
N Leaching ◽  
Agricultural Activity ◽  
Fecal Matter ◽  
Karst Terrain ◽  
Karst Areas ◽  
The Impact

The impact on water quality by agricultural activity in karst terrain is an important consideration for resource management within the Appalachian region. Karst areas comprise about 18% of the region’s land area. An estimated one-third of the region’s farms, cattle, and agricultural market value are located on karst terrain. Mean nitrate concentrations in several karst springs in southeastern West Virginia exhibit a strong linear relationship with the percentage of agriculture land cover. Development of best management practices for efficient nitrogen (N) use and reduction of outflow of N to water from karst areas requires knowledge about N dynamics on those landscapes. Water extractable NO3-N and NH4-N were measured along transects at four soil depths in two grazed sinkholes and one wooded sinkhole. Distribution of soil NO3-N and NH4-N were related to frequency of animal presence and to topographic and hydrologic redistribution of soil and fecal matter in the grazed sinkholes. Karst pastures are characterized by under drainage and funneling of water and contaminants to the shallow aquifer. Control of NO3-N leaching from karst pasture may depend on management strategies that change livestock grazing behavior in sinkholes and reduce the opportunity for water and contaminants to quickly reach sinkhole drains.

Field Measurements and Simulation of Nitrogen Fate under Citrus Production

HortScience ◽  
1998 ◽  
Vol 33 (3) ◽  
pp. 498c-498
Author(s):  
A. Fares ◽  
A.K. Alva ◽  
S. Paramasivam
Keyword(s):  
Mass Balance ◽  
Best Management Practices ◽  
Rainy Season ◽  
Crop Production ◽  
Management Practices ◽  
Root Zone ◽  
Field Measurements ◽  
Irrigation Scheduling ◽  
N Leaching ◽  
Citrus Production

Water and nitrogen (N) are important inputs for most crop production. The main objectives of nitrogen best management practices (NBMP) are to improve N and water management to maximize the uptake efficiency and minimize the leaching losses. This require a complete understanding of fate of N and water mass balance within and below the root zone of the crop in question. The fate of nitrogen applied for citrus production in sandy soils (>95% sand) was simulated using a mathematical model LEACHM (Leaching Estimation And Chemistry Model). Nitrogen removal in harvested fruits and storage in the tree accounted the major portion of the applied N. Nitrogen volatilization mainly as ammonia and N leaching below the root zone were the next two major components of the N mass balance. A proper irrigation scheduling based on continuous monitoring of the soil water content in the rooting was used as a part of the NBMP. More than 50% of the total annual leached water below the root zone was predicted to occur in the the rainy season. Since this would contribute to nitrate leaching, it is recomended to avoid N application during the rainy season.

scholarly journals Assessing the Potential of Nontraditional Water Sources for Landscape Irrigation

2018 ◽  
Vol 28 (4) ◽  
pp. 436-444 ◽  
Author(s):  
Raul I. Cabrera ◽  
James E. Altland ◽  
Genhua Niu
Keyword(s):  
Best Management Practices ◽  
Urban Areas ◽  
Management Practices ◽  
Urban Landscape ◽  
Biological Properties ◽  
Water Sources ◽  
Long Term Effects ◽  
Natural Ecosystems ◽  
Aesthetic Quality ◽  
The Impact

Scarcity and competition for good quality and potable water resources are limiting their use for urban landscape irrigation, with several nontraditional sources being potentially available for these activities. Some of these alternative sources include rainwater, stormwater, brackish aquifer water, municipal reclaimed water (MRW), air-conditioning (A/C) condensates, and residential graywater. Knowledge on their inherent chemical profile and properties, and associated regional and temporal variability, is needed to assess their irrigation quality and potential short- and long-term effects on landscape plants and soils and to implement best management practices that successfully deal with their quality issues. The primary challenges with the use of these sources are largely associated with high concentrations of total salts and undesirable specific ions [sodium (Na), chloride (Cl), boron (B), and bicarbonate (HCO3−) alkalinity]. Although the impact of these alternative water sources has been largely devoted to human health, plant growth and aesthetic quality, and soil physicochemical properties, there is emergent interest in evaluating their effects on soil biological properties and in natural ecosystems neighboring the urban areas where they are applied.

scholarly journals Perceived vulnerability and propensity to adopt best management practices for huanglongbing disease of citrus in California

2021 ◽  
Author(s):  
Sara Garcia Figuera ◽  
Holly Deniston-Sheets ◽  
Elizabeth E Grafton-Cardwell ◽  
Bruce Babcock ◽  
Mark Lubell ◽  
...  
Keyword(s):  
Best Management Practices ◽  
Management Practices ◽  
Control Program ◽  
Integrated Approach ◽  
Perceived Vulnerability ◽  
Best Management ◽  
Preventive Practices ◽  
Citrus Groves ◽  
Plant Disease Management ◽  
The Impact

Huanglongbing (HLB) disease of citrus, associated with the bacterium “Candidatus Liberibacter asiaticus”, is confined to residential properties in Southern California eight years after it was first detected in the state. To prevent the spread of HLB to commercial citrus groves, growers have been asked to adopt a portfolio of voluntary best management practices. This study evaluates the citrus industry’s propensity to adopt these practices using surveys and a novel multivariate ordinal regression model. We estimate the impact on adoption of perceived vulnerability to HLB, intentions to stay informed and communicate about the disease and various socio-economic factors, and reveal what practices are most likely to be jointly adopted as an integrated approach to HLB. Survey participants were in favor of scouting and surveying for HLB symptoms, but they were reluctant to test trees, use early detection technologies (EDTs) or install barriers around citrus groves. Most practices were perceived as complementary, particularly visual inspections and some combinations of preventive practices with tests and EDTs. Participants who felt more vulnerable to HLB had a higher propensity to adopt several practices, as well as those who intended to stay informed and communicate with the coordinators of the HLB control program, although this effect was modulated by the perceived vulnerability to HLB. Communication with neighbors and the size of citrus operations also influenced practice adoption. Based on these results, we provide recommendations for outreach about HLB management in California and suggest future directions for research about the adoption of plant disease management practices.

scholarly journals The Role of Electric Power Sector in China’s Global Economic Expansion

2019 ◽  
Vol 12 (6) ◽  
pp. 188-202
Author(s):  
R. A. Epikhina
Keyword(s):  
Developing Countries ◽  
Best Management Practices ◽  
Nuclear Power ◽  
Management Practices ◽  
Power Transmission ◽  
Developed Countries ◽  
Electricity Sector ◽  
Power Sector ◽  
Economic Expansion ◽  
The Impact

The article discusses some of the major characteristics and trends of China’s economic expansion in the global power industry. It argues that by investing in electricity infrastructure China creates prerequisites for long-term dominance in one of the key sectors in a number of countries and regions. Deals in the power sector are mainly implemented by state-owned companies and facilitated by state-owned financial institutions. In terms of structure and geography, foreign investment in the electricity sector is dominated by traditional types of generation in developing countries. However, China has been diversifying into renewables, nuclear power and grids and entering markets of the developed countries. The creation of a special international organization (GEIDCO) should facilitate its expansion in the electricity sector abroad. It is worth noting that foreign economic expansion plays an important role in supporting China’s slowing economy amid the transformation of its growth model. It allows China to adopt advanced technologies and best management practices in developed countries while forming alternative value chains, as well as promoting its own equipment and standards (especially in ultra-high voltage power transmission) in the developing countries. However, given the impact of the trade war, increasing securitization of the Chinese foreign investments, Chinese authorities’ control over capital outflows and the rising environmental concerns in developing countries, further expansion of the Chinese capital in the global electricity industry is likely to be held back, while competition from non-Chinese electricity companies is likely to grow.

scholarly journals Soil Temperatures of the Transylvanian Plain, Romania

1970 ◽  
Vol 66 (1) ◽  
Author(s):  
David WEINDORF ◽  
Beatrix HAGGARD ◽  
Teodor RUSU ◽  
Horea CACOVEAN ◽  
Stephanie JOHNSON
Keyword(s):  
Soil Moisture ◽  
Best Management Practices ◽  
Annual Variation ◽  
Management Practices ◽  
Physicochemical Analysis ◽  
Slope Aspect ◽  
Best Management ◽  
Important Region ◽  
Soil Temperatures ◽  
The Impact

The Transylvanian Plain, Romania is an important region for agronomic productivity. However, limited soils data and adoption of best management practices can hinder land productivity. Soil temperatures of the Transylvanian Plain were evaluated using a set of twenty datalogging stations positioned throughout the plain. Soil temperatures were monitored at the surface, 10 cm, 30 cm, and 50 cm, and soil moisture was monitored at 10 cm. Pedons were excavated, described, and sampled for physicochemical analysis. Preliminary results indicate that most soils of the Transylvanian Plain will have a mesic temperature regime. However, differences in seasonal warming and cooling trends across the plain were noted. These have important implications for planting recommendations. Some soils of the plain were noted to freeze at 50 cm, while others did not. Longer term study of temperatures of the Transylvanian Plain will average out annual variation in soil temperature and evaluate the impact of slope aspect, slope inclination, soil moisture, and physicochemical properties on soil temperatures.

scholarly journals Assessing the Impact of Best Management Practices in a Highly Anthropogenic and Ungauged Watershed Using the SWAT Model: A Case Study in the El Beal Watershed (Southeast Spain)

Agronomy ◽  
2019 ◽  
Vol 9 (10) ◽  
pp. 576 ◽  
Author(s):  
Adrián López-Ballesteros ◽  
Javier Senent-Aparicio ◽  
Raghavan Srinivasan ◽  
Julio Pérez-Sánchez
Keyword(s):  
Coastal Lagoon ◽  
Best Management Practices ◽  
Management Practices ◽  
Assessment Tool ◽  
Swat Model ◽  
Fertilizer Application ◽  
Coefficient Of Determination ◽  
Check Dam ◽  
Best Management ◽  
The Impact

Best management practices (BMPs) provide a feasible solution for non-point source pollution problems. High sediment and nutrient yields without retention control result in environmental deterioration of surrounding areas. In the present study, the soil and water assessment tool (SWAT) model was developed for El Beal watershed, an anthropogenic and ungauged basin located in the southeast of Spain that drains into a coastal lagoon of high environmental value. The effectiveness of five BMPs (contour planting, filter strips, reforestation, fertilizer application and check dam restoration) was quantified, both individually and in combination, to test their impact on sediment and nutrient reduction. For calibration and validation processes, actual evapotranspiration (AET) data obtained from a remote sensing dataset called Global Land Evaporation Amsterdam Model (GLEAM) were used. The SWAT model achieved good performance in the calibration period, with statistical values of 0.78 for Kling–Gupta efficiency (KGE), 0.81 for coefficient of determination (R2), 0.58 for Nash–Sutcliffe efficiency (NSE) and 3.9% for percent bias (PBIAS), as well as in the validation period (KGE = 0.67, R2 = 0.83, NS = 0.53 and PBIAS = −25.3%). The results show that check dam restoration is the most effective BMP with a reduction of 90% in sediment yield (S), 15% in total nitrogen (TN) and 22% in total phosphorus (TP) at the watershed scale, followed by reforestation (S = 27%, TN = 16% and TP = 20%). All effectiveness values improved when BMPs were assessed in combination. The outcome of this study could provide guidance for decision makers in developing possible solutions for environmental problems in a coastal lagoon.

scholarly journals Review of attitudes and awareness in the agricultural industry to diffuse pollution issues

2005 ◽  
Vol 51 (3-4) ◽  
pp. 373-381 ◽  
Author(s):  
D. Merrilees ◽  
A. Duncan
Keyword(s):  
Best Management Practices ◽  
Management Practices ◽  
Technical Information ◽  
Diffuse Pollution ◽  
Mitigation Measures ◽  
Agricultural Industry ◽  
Agricultural Enterprises ◽  
Farming Industry ◽  
Farm Business ◽  
The Impact

The Scottish Executive considers ‘Diffuse Pollution from Agricultural Enterprises’ as a priority issue over the next 5-10 years and recognises the need to improve knowledge transfer, advice and training amongst farmers, crofters, contractors and advisers. The Scottish Environment Protection Agency commissioned SAC to survey advisory staff on diffuse pollution issues, mitigation measures and delivery of environmental advice to the farming industry. This showed that the impact of agricultural diffuse pollution on the environment is considered a serious problem as is the future impact of legislation on farm business. There is an urgent requirement to raise advisers' awareness of environmental legislation and of mitigation measures. Advisers consider that farmers have limited awareness of diffuse pollution problems but those that do would consider the impact on the environment to be serious. There is a lack of knowledge on the effectiveness of pollution mitigation measures. Better technical information, supported by research, is required. This information is best conveyed to advisers via the internet, technical notes and directly by environmental specialists and delivered on to farmers by farm visits. Lack of funds prevents most farmers adopting best management practices and more than 80% of advisers consider that environmental advice should be free.

Changing management in Scottish birch woodlands: a potential threat to local invertebrate biodiversity

2003 ◽  
Vol 93 (2) ◽  
pp. 159-167 ◽  
Author(s):  
B.A. Woodcock ◽  
S.R. Leather ◽  
A.D. Watt
Keyword(s):  
Community Structure ◽  
Management Practices ◽  
Livestock Grazing ◽  
Community Diversity ◽  
Timber Production ◽  
Potential Threat ◽  
North East ◽  
Invertebrate Biodiversity ◽  
Wide Scale ◽  
The Impact

AbstractThe silvicultural management of Scottish birch woodlands for timber production is replacing traditional low intensity management practices, such as domesticated livestock grazing. These new management practices involve thinning of existing woodlands to prescribed densities to maximize biomass and timber quality. Although presently infrequent, the wide scale adoption of this practice could affect invertebrate community diversity. The impact of these changes in management on Staphylinidae and Carabidae (Coleoptera) in 19 woodlands in Aberdeenshire, north-east Scotland was investigated. Grazing and logging practices were important determinants of beetle community structure. Woodland area had no effect on any measure of beetle community structure, although isolation did influence the abundance of one carabid species. Changes towards timber production forestry will influence the structure of invertebrate communities, although the scale at which this occurs will determine its effect.

scholarly journals The Impact of the Louisiana Master Gardener Program on the Perceived and Actual Horticultural Knowledge of Program Participants

HortScience ◽  
2006 ◽  
Vol 41 (4) ◽  
pp. 968E-969
Author(s):  
Bobby H. Fletcher ◽  
Michael F. Burnett ◽  
Krisanna L. Machtmes ◽  
Jeff S. Kuehny
Keyword(s):  
Best Management Practices ◽  
Management Practices ◽  
The United States ◽  
Master Gardener ◽  
Perceived Knowledge ◽  
Highly Educated ◽  
Best Management ◽  
Before And After ◽  
Knowledge And Practice ◽  
The Impact

The primary purpose of this study was to determine the impact of participation in the Master Gardener program on horticultural knowledge and practice. In 1972, the “Master Gardener” concept was initiated in Washington State due to the high demand to answer consumer horticultural questions. The main objective of this program is to increase horticultural knowledge of program participants so they can transfer this information to consumer horticultural clientele. The program quickly spread throughout the United States. It reached Louisiana in 1994 and was expanded throughout most metropolitan areas by 1997. No formal evaluation has been conducted to determine the horticultural knowledge impacts of this program. All 257 participants in the 2004 Louisiana Master Gardener (LMG) program were surveyed before and after participation in this program. The survey used was a researcher-developed instrument designed to measure self-perceived knowledge, tested knowledge, and Best Management Practices (BMPs) used. Data were collected by master gardener coordinators and submitted to the researcher after each phase of data collection (pre and post). Results of the study revealed that the LMG participants were highly educated, mostly Caucasian, and mostly female. Significant improvements were identified in all of the knowledge and practice measurements included in the study. These included self-perceived knowledge, tested knowledge, and use of BMPs. It was concluded that the 2004 Louisiana Master Gardener program was effective in increasing the self-perceived horticultural knowledge and tested horticultural knowledge of program participants. In addition, the study concluded that the 2004 Louisiana Master Gardener program improved the use of BMPs among the participants.

scholarly journals Population Status of Tapanuli Orangutan (Pongo tapanuliensis) within the Renewable Energy Development and its Management Implications

2021 ◽  
pp. 478-493
Author(s):  
Didik Prasetyo ◽  
Yokyok Hadiprakarsa ◽  
Wanda Kuswanda ◽  
Jito Sugardjito
Keyword(s):  
Best Management Practices ◽  
Management Practices ◽  
Forest Conversion ◽  
Suitable Habitat ◽  
Construction Time ◽  
Species Survival ◽  
Project Construction ◽  
And Behavior ◽  
Time Frames ◽  
The Impact

To protect Tapanuli orangutan it is essential to understand the actual situation. It has been studied 15% of its population live outside the protected area facing a density disruption due to forest conversion. Several best management practices have been created and tested for different natural concession types. Yet, the main objective to reduce the impact and increase wildlife survival is far away from the goal. To improve our understanding of the species survival within ongoing project construction, we conducted population density monitoring prior- to post-construction time frames within the hydroelectric dam project. Also, we carried out spatial analysis to understand the land cover change and orangutan’s suitable habitat distribution. This study found that during high construction activities, orangutans were avoiding the threat sources, and returned when the disturbances reduced. These findings indicated orangutans are ecology flexible and have the capability to increase its survival, although the company’s involvement is crucial to facilitate the successes. Our study is based on indirect observation, and spatial modeling, which may lead to an uncertain conclusion. Further research on orangutan ecology and behavior is prioritized.

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