scholarly journals Group-based On-site Active Learning (GOAL): Technique for Investigating Nitrogen Management in Container Nurseries

2004 ◽  
Vol 14 (3) ◽  
pp. 442-448
Author(s):  
David R. Sandrock ◽  
Ray D. William ◽  
Anita N. Azarenko
Keyword(s):  
Active Learning ◽  
Best Management Practices ◽  
Management Practices ◽  
Management Decisions ◽  
System Perspective ◽  
Learning Goal ◽  
New Ideas ◽  
Container Nurseries ◽  
N Management ◽  
Container Nursery

Nitrogen (N) management in container nurseries is part of a complex system. Working within this system, nursery owners, managers and employees routinely make N management decisions that have consequences for the immediate nursery environment (e.g., plant growth, yield, disease susceptibility, water quality) as well as areas beyond nursery boundaries (e.g., surface and groundwater quality, public perception). Research approaches often address parts of the system associated with the immediate nursery environment and purpose. As a result, best management practices that contribute to greater N use efficiency have been developed. Research approaches that consider the whole system reveal novel relationships and patterns that identify areas for future research and may direct future management decisions. To investigate N management from a whole system perspective, a group of nursery managers from Oregon and scientists from Oregon State University met three times between 2001 and 2003. Growers drew their N management systems and identified components, relationships and feedback loops using an ActionGram technique. From this information, researchers developed Group-based On-site Active Learning (GOAL). GOAL combines Action-Grams and the Adaptive Cycle at container nursery sites. In this case, N flow and management in container production systems served as the topic of active learning. Managers and employees from four wholesale container nurseries evaluated the GOAL exercise. After completing GOAL, 94% of participants indicated that they learned a new idea or concept about N cycling in their container nursery. Of those, 100% gained new ideas and concepts from peers and colleagues present at the meeting. In addition, 60% gained new ideas and concepts from researchers and 60% developed their own ideas and concepts. GOAL is a learning tool that provides a simple, convenient, interactive format for investigating complex systems.

scholarly journals Best Management Practices for Minimizing Nitrate Leaching from Container-Grown Nurseries

2001 ◽  
Vol 1 ◽  
pp. 96-102 ◽  
Author(s):  
Jianjun Chen ◽  
Yingfeng Huang ◽  
Russell D. Caldwell
Keyword(s):  
Surface Water ◽  
Nitrate Leaching ◽  
Best Management Practices ◽  
Management Practices ◽  
Ornamental Plants ◽  
Fertilizer Application ◽  
Plant Production ◽  
Agricultural Practice ◽  
Application Rates ◽  
N Management

Containerized plant production represents an extremely intensive agricultural practice; 40,000 to 300,000 containers may occupy one acre of surface area to which a large amount of chemical fertilizer is applied. Currently, recommended fertilizer application rates for the production of containerized nursery ornamental plants are in excess of plant requirements, and up to 50% of the applied fertilizers may run off or be leached from containers. Among the nutrients leached or allowed to runoff, nitrogen (N) is the most abundant and is of major concern as the source of ground and surface water pollution. In this report, current N fertilizer application rates for different container-grown nursery ornamental plants, the amount of nitrate leaching or runoff from containers, and the potential for nitrate contamination of ground and surface water are discussed. In contrast, our best N management practices include: (1) applying fertilizers based on plant species need; (2) improving potting medium�s nutrient holding capacity using obscure mineral additives; (3) using controlled-release fertilizers; and (4) implementing zero runoff irrigation or fertigation delivery systems that significantly reduce nitrate leaching or runoff in containerized plant production and encourage dramatic changes in N management.

scholarly journals Assessment of productivity and resource use efficiency of rice under different establishment methods and nutrient management in Chitwan condition, Nepal

2018 ◽  
Vol 18 ◽  
pp. 41-50
Author(s):  
Chandika Lama ◽  
Santosh Marahatta
Keyword(s):  
Best Management Practices ◽  
Management Practices ◽  
Nutrient Management ◽  
Conventional Tillage ◽  
Humid Climate ◽  
Best Management ◽  
Transplanted Rice ◽  
Direct Seeded ◽  
Use Efficiency ◽  
N Management

A field experiment was conducted in sub humid climate of inner terai of Nepal to determine the productivity and economics of rice under direct seeded and transplanted methods under different nutrient management in strip plot design with three replications in 2013, rainy season. The treatment consisted of three tillage methods, conventional tillage direct seeded rice, unpuddled transplanted rice and Puddled transplanted rice and five nutrient management practices Recommended Nitrogen(N), Phosphorous(P) and Potassium(K), 100:30:30 Kg NPK ha-1; Leaf color chart based N + Recommended PK; Farmers’ Practice, 48.30:34.50:0.00 Kg NPK ha-1; 0N + Recommended PK and 150% of Recommended NPK. The result revealed that grain and straw yield were not significant due to crop establishment methods. LCC based N application yield was comparable with 150% of Rec. NPK and Rec. NPK. Saving N on LCC based N management with 41.56 Kg ha-1 and 9.44 Kg N ha-1 over 150% of recommended NPK recommended NPK respectively. Adoption of CT-DSR reduced the total cost of cultivation by 30.13% and B:C ratio by 45.95% over P-TPR. The lower cost, higher benefit and the same production, revealed that LCC based N management under CT-DSR was the best management practices over the conventional P-TPR.

scholarly journals Florida Nursery Best Management Practices: Past, Present, and Future

2010 ◽  
Vol 20 (1) ◽  
pp. 82-88 ◽  
Author(s):  
Tom Yeager ◽  
Jeff Million ◽  
Claudia Larsen ◽  
Bob Stamps
Keyword(s):  
Water Quality ◽  
Surface Water ◽  
Best Management Practices ◽  
Management Practices ◽  
Surface Water Quality ◽  
The State ◽  
Fertilizer Use ◽  
Best Management ◽  
Quality Issues ◽  
Container Nurseries

Florida container nurseries face the challenge of maintaining profitability while protecting the environment by improving the efficiency of water and fertilizer use. Best management practices (BMPs) provide irrigation and fertilization guidelines for meeting this challenge. BMPs are economically and technologically feasible to implement and they focus on the ground- and surface water quality issues of the state. However, increasing nursery participation in the statewide BMP program is crucial as the industry continues to expand and interface with urbanization.

scholarly journals Watering Station Best Management Practices for Container Nurseries

EDIS ◽  
2020 ◽  
Vol 2020 (5) ◽  
Author(s):  
Tom Yeager
Keyword(s):  
Best Management Practices ◽  
Natural Waters ◽  
Management Practices ◽  
Nitrogen And Phosphorus ◽  
Fact Sheet ◽  
Best Management ◽  
Container Nurseries

Watering stations are specialized irrigation structures where plants are watered immediately after transplanting. Water not retained by the container substrate as well as water falling between containers becomes runoff. This runoff can contain sediment and nutrients, such as nitrogen and phosphorus, that can impact natural waters if not managed according to Best Management Practices (BMPs). The purpose of this new 3-page fact sheet is to provide examples of how runoff from watering stations at two nurseries was managed after implementation of the BMP. Written by Tom Yeager and published by the UF/IFAS Environmental Horticulture Department.https://edis.ifas.ufl.edu/ep590

scholarly journals The BMP Consensus Challenge

2006 ◽  
Vol 16 (3) ◽  
pp. 386-389
Author(s):  
Thomas H. Yeager
Keyword(s):  
Water Quality ◽  
Surface Water ◽  
Total Phosphorus ◽  
Best Management Practices ◽  
Management Practices ◽  
Cultural Practices ◽  
Water Movement ◽  
Research Information ◽  
Runoff Water ◽  
Container Nursery

The nursery industry in Broward County, Fla., had to choose between partaking in the resolution needed to achieve 10 ppb total phosphorus discharged to the Everglades or face regulation. The industry decided to pursue the proactive route and implement best management practices (BMPs). Teams of industry personnel were formed to develop the content of the Florida Container Nursery BMP Guide that contained the following chapters: 1) nursery layout, 2) container substrate and planting practices, 3) fertilization management, 4) container substrate nutrient monitoring, 5) irrigation water quality, 6) irrigation application, 7) irrigation uniformity, 8) erosion control and runoff water management, 9) pesticide management, and 10) waste management. Each team was to determine the content of their chapter, based on cultural practices producers were currently using, or could be using, which would minimize or reduce surface water movement of phosphorus from the nursery to adjacent water. Cultural practices, brought forth after a consensus was achieved by each team in concert with governmental agencies, associations, and allied industries, were meshed with research information, or the “best” information available from academic sources to ensure that the resolutions or BMPs that were written would contribute to resolving the confl ict (i.e., elevated total phosphorus in canal waters). Consensus development is a new challenge for most academicians but it is important because unbiased and science-based knowledge is needed to assist in BMP development. Furthermore, consensus of those directly and indirectly involved in the nursery industry helps facilitate the use of BMPs. Once the Florida Container Nursery BMP Guide is adopted by rule under the statutory authority of the Florida Department of Agriculture and Consumer Services, nursery operators voluntarily using the BMPs and keeping appropriate records will receive a waiver of liability from cleanup costs associated with contaminated ground or surface water, and be presumed to be in compliance with state water quality standards.

scholarly journals Six State Survey of Container Nursery Nitrate Nitrogen Runoff

1993 ◽  
Vol 11 (4) ◽  
pp. 206-208
Author(s):  
T. Yeager ◽  
R. Wright ◽  
D. Fare ◽  
C. Gilliam ◽  
J. Johnson ◽  
...  
Keyword(s):  
North Carolina ◽  
Drinking Water ◽  
Controlled Release ◽  
Best Management Practices ◽  
Management Practices ◽  
Best Management ◽  
Drinking Water Standard ◽  
Nitrogen Runoff ◽  
Controlled Release Fertilizers ◽  
Container Nursery

Abstract Container nursery bed runoff, reservoirs or ponds that contained runoff, wells, and surface water discharged from the property or at the property border were sampled at approximately 6-week intervals during April–October 1990 in Alabama, Florida, New Jersey, North Carolina, Ohio, and Virginia. Runoff from container beds averaged 8 and 20 ppm NO3-N, respectively, for nurseries using controlled-release fertilizers (CRF) and controlled-release fertilizers supplemented with solution fertilizers (CRFSS). Average NO3-N levels for runoff collection ponds, property borders, and wells were each less than 10 ppm, the drinking water limit, regardless of fertilizers used. However, ppm NO3-N for some samples exceeded the drinking water standard. In general, these data indicate reason for concern and nursery operators need to implement best management practices.

Watershed modeling using large-scale distributed computing in Condor and the Soil and Water Assessment Tool model

SIMULATION ◽  
2011 ◽  
Vol 88 (3) ◽  
pp. 365-380 ◽  
Author(s):  
Margaret W Gitau ◽  
Li-Chi Chiang ◽  
Mohamed Sayeed ◽  
Indrajeet Chaubey
Keyword(s):  
Water Quality ◽  
Best Management Practices ◽  
Large Scale ◽  
Management Practices ◽  
Assessment Tool ◽  
Swat Model ◽  
Watershed Modeling ◽  
Management Decisions ◽  
Water Assessment ◽  
Soil And Water

Models are increasingly being used to quantify the effects of best management practices (BMPs) on water quality. While these models offer the ability to study multiple BMP scenarios, and to analyze impacts of various management decisions on watershed response, associated analyses can be very computationally intensive due to a large number of runs needed to fully capture the various uncertainties in the model outputs. There is, thus, the need to develop suitable and efficient techniques to handle such comprehensive model evaluations. We demonstrate a novel approach to accomplish a large number of model runs with Condor, a distributed high-throughput computing framework for model runs with the Soil and Water Assessment Tool (SWAT) model. This application required more than 43,000 runs of the SWAT model to evaluate the impacts of 172 different watershed management decisions combined with weather uncertainty on water quality. The SWAT model was run in the Condor environment implemented on the TeraGrid. This framework significantly reduced the model run time from 2.5 years to 18 days and enabled us to perform comprehensive BMP analyses that may not have been possible with traditional model runs on a few desktop computers. The Condor system can be used effectively to make Monte Carlo analyses of complex watershed models requiring a large number of computational cycles.

scholarly journals Survey of Container Nursery Irrigation Practices in West-central Florida: An Educational Opportunity

2006 ◽  
Vol 16 (4) ◽  
pp. 682-685 ◽  
Author(s):  
Gisele Schoene ◽  
Thomas Yeager ◽  
Dorota Haman
Keyword(s):  
Best Management Practices ◽  
Management Practices ◽  
Educational Opportunity ◽  
Irrigation System ◽  
Primary Source ◽  
Educational Programs ◽  
Central Florida ◽  
West Central ◽  
Container Nurseries ◽  
Irrigation Requirements

A survey was conducted of nursery operators participating in workshops in west-central Florida. The purpose of the survey was to identify the irrigation best management practices (BMPs) adopted by container nurseries in west-central Florida and obtain information regarding emphasis of future extension educational programs. Workshops were conducted in Hillsborough County, Fla., and Manatee County, Fla., and participation was voluntary. Respondents were asked about BMPs used in the nurseries according to the irrigation system used and it was found that the majority of the nurseries relied on well water as the primary source for irrigation. While 69% of the nurseries monitored uniformity of microirrigation systems, only 35% monitored uniformity of overhead irrigation systems. Thirty-four percent of the nurseries collected irrigation or rain runoff and 9% knew the water holding capacity of their substrate. Most of the nurseries grouped plants by irrigation requirements (74%) and grouped container sizes by irrigation requirements (69%). The survey indicates that many BMPs are not widely adopted by nurseries in west-central Florida. The information from this survey can be used as a guide to focus the efforts of university extension educational programs to achieve greater adoption of BMPs.

scholarly journals DEVELOPMENT OF IRRIGATION AND FERTILIZATION BEST MANAGEMENT PRACTICES FOR CONTAINER NURSERIES.

HortScience ◽  
1995 ◽  
Vol 30 (3) ◽  
pp. 433d-433
Author(s):  
Tom Yeager ◽  
Donna Fare ◽  
Charles Gilliam ◽  
Alex Niemiera
Keyword(s):  
Best Management Practices ◽  
Management Practices ◽  
Environmentally Friendly ◽  
Late Summer ◽  
Regulatory Agencies ◽  
Best Management ◽  
University Personnel ◽  
The Future ◽  
Container Nurseries

More regulations have an impact on nursery industry today than 10 to 20 years ago, and additional regulations are likely in the future. In view of this, the southeastern nursery industry is taking proactive action by developing a handbook of irrigation and fertilization best management practices (BMP) for container nurseries. Using BMP would be voluntary but could “head off” additional regulations. Additionally, BMP would serve as guidelines for growers 1) attempting to be more environmentally friendly, 2) wanting to promote the fact they are environmentally friendly, and 3) dealing with a complaint from regulatory agencies. Our objective was to develop a BMP handbook that nursery managers could use to find answers quickly to management questions regarding irrigation and fertilization. The handbook was written by university horticulturists, but input and reviews were obtained from industry personnel, additional university personnel, and others associated with the nursery industry. The handbook will be distributed in late summer by the Southern Nurserymen's Association, Marietta, Ga.

Sign in / Sign up

Export Citation Format

Share Document