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Articles 1 - 9 of 9
Full-Text Articles in Agriculture
Identification And Management Of Phytophthora Aerial Blight Caused By Phytophthora Nicotianae On Catharanthus Roseus, Fulya Baysal-Gurel, Ravi Bika, Terri Simmons, Farhat A. Avin
Identification And Management Of Phytophthora Aerial Blight Caused By Phytophthora Nicotianae On Catharanthus Roseus, Fulya Baysal-Gurel, Ravi Bika, Terri Simmons, Farhat A. Avin
Agricultural and Environmental Sciences Faculty Research
Phytophthora nicotianae is the most common pathogen in nurseries and gardens, infecting both woody and herbaceous ornamental plants. Phytophthora aerial blight symptoms such dull water-soaked lesions on shoot tips and leaf petioles, girdling on the main stem, necrosis, and wilting of annual vinca were observed in a commercial greenhouse in Warren Co., Tennessee, USA in May 2016. The objective of this study was to identify the causal agent of Phytophthora aerial blight and develop a fungicide management recommendation for ornamental producers. Attempts to isolate the pathogen from symptomatic leaf tissue were conducted and excised leaf pieces were embedded in the …
Comparative Study Of Sensory Attributes Of Leafy Green Vegetables Grown Under Organic And Conventional Management, Kripa Dhakal, Ramasamy Ravi, Dilip Nandwani
Comparative Study Of Sensory Attributes Of Leafy Green Vegetables Grown Under Organic And Conventional Management, Kripa Dhakal, Ramasamy Ravi, Dilip Nandwani
Agricultural and Environmental Sciences Faculty Research
This study was carried out to compare the sensory qualities of leafy green vegetables (collard, kale, lettuce and swiss chard) grown under organic and conventional production systems. Four leafy greens were produced on an organically and conventionally managed research farm of Tennessee State University, Nashville, TN in Spring 2019 and 2020. Crops in a conventional field were grown in the open field, whereas in organic field crops were grown in the open and under three different row covers (agribon cloth, insect net and plastic). Row covers in organic systems were used to protect crops from insect damage. Plant samples were …
Automatic Identification And Monitoring Of Plant Diseases Using Unmanned Aerial Vehicles: A Review, Krishna Neupane, Fulya Baysal-Gurel
Automatic Identification And Monitoring Of Plant Diseases Using Unmanned Aerial Vehicles: A Review, Krishna Neupane, Fulya Baysal-Gurel
Agricultural and Environmental Sciences Faculty Research
Disease diagnosis is one of the major tasks for increasing food production in agriculture. Although precision agriculture (PA) takes less time and provides a more precise application of agricultural activities, the detection of disease using an Unmanned Aerial System (UAS) is a challenging task. Several Unmanned Aerial Vehicles (UAVs) and sensors have been used for this purpose. The UAVs’ platforms and their peripherals have their own limitations in accurately diagnosing plant diseases. Several types of image processing software are available for vignetting and orthorectification. The training and validation of datasets are important characteristics of data analysis. Currently, different algorithms and …
Effect Of Volatile Compounds Produced By Selected Bacterial Endophytes In Promoting Plant Growth, Asha Maheshwari, Margaret T. Mmbaga, Bandana Bhusal, Christine A. Ondzighi-Assoume
Effect Of Volatile Compounds Produced By Selected Bacterial Endophytes In Promoting Plant Growth, Asha Maheshwari, Margaret T. Mmbaga, Bandana Bhusal, Christine A. Ondzighi-Assoume
Agricultural and Environmental Sciences Faculty Research
Bacterial endophytes selected for their capability to suppress diverse fungal pathogens in vitro and in greenhouse studies have been shown to promote plant growth. The effect of volatile compounds emitted by selected bacteria on plant growth in Arabidopsis thaliana, tomato (Solanum lycopersicum), sweet pepper (Capsicum annuum), and cucumbers (Cucumis sativus) was evaluated on container-grown plants nested above bacterial cultures, with roots exposed to the volatiles without direct contact between bacterial cells and the plant roots. Significant increases in plant growth were observed in plant height, root length, leaf size, fresh weight, and chlorophyll content in all plants tested. Although diverse …
Assessing The Impact Of Organic Versus Conventional Agricultural Management On Soil Hydraulic Properties In A Long-Term Experiment, Abdelrahman Alfahham, Matthew T. Amato, Emmanuel Omondi, Daniel Giménez, Alain F. Plante
Assessing The Impact Of Organic Versus Conventional Agricultural Management On Soil Hydraulic Properties In A Long-Term Experiment, Abdelrahman Alfahham, Matthew T. Amato, Emmanuel Omondi, Daniel Giménez, Alain F. Plante
Agricultural and Environmental Sciences Faculty Research
Investigating the effects of various agricultural management systems on soil hydraulic properties in long-term field experiments allows farmers to evaluate their efficacy in mitigating the effects of droughts and floods, which are expected to intensify in the coming decades. This study's main objective was to quantify soil structural and hydraulic properties in plots under organic manure, organic leguminous, and conventional agricultural management and related tillage practices at Rodale Institute's Farming Systems Trial. Soil cores were collected at depths of 0–10, 10–20, and 20–30 cm and analyzed for soil water retention, saturated hydraulic conductivity (Ksat), soil organic C (SOC), bulk density, …
Can Agricultural Management Induced Changes In Soil Organic Carbon Be Detected Using Mid-Infrared Spectroscopy?, Jonathan Sanderman, Kathleen Savage, Shree R.S. Dangal, Gabriel Duran, Charlotte Rivard, Michel A. Cavigelli, Hero T. Gollany, Virginia L. Jin, Mark A. Liebig, Emmanuel Chiwo Omondi, Yichao Rui, Catherine Stewart
Can Agricultural Management Induced Changes In Soil Organic Carbon Be Detected Using Mid-Infrared Spectroscopy?, Jonathan Sanderman, Kathleen Savage, Shree R.S. Dangal, Gabriel Duran, Charlotte Rivard, Michel A. Cavigelli, Hero T. Gollany, Virginia L. Jin, Mark A. Liebig, Emmanuel Chiwo Omondi, Yichao Rui, Catherine Stewart
Agricultural and Environmental Sciences Faculty Research
A major limitation to building credible soil carbon sequestration programs is the cost of measuring soil carbon change. Diffuse reflectance spectroscopy (DRS) is considered a viable low-cost alternative to traditional laboratory analysis of soil organic carbon (SOC). While numerous studies have shown that DRS can produce accurate and precise estimates of SOC across landscapes, whether DRS can detect subtle management induced changes in SOC at a given site has not been resolved. Here, we leverage archived soil samples from seven long-term research trials in the U.S. to test this question using mid infrared (MIR) spectroscopy coupled with the USDA-NRCS Kellogg …
Attitudes Of Fruit And Vegetable Farmers Towards Organic Farming In Kathmandu Valley, Nepal, Dilip Nandwani, Dinesh Jamarkattel, Khem Raj Dahal, Ritikshya Poudel, Suman Giri, Toya Nath Joshi
Attitudes Of Fruit And Vegetable Farmers Towards Organic Farming In Kathmandu Valley, Nepal, Dilip Nandwani, Dinesh Jamarkattel, Khem Raj Dahal, Ritikshya Poudel, Suman Giri, Toya Nath Joshi
Agricultural and Environmental Sciences Faculty Research
Organic farming is increasingly popular among the farmers of Kathmandu valley. However, the organic growers have been facing issues in production, organic certification, and product marketing. To date, little is known about the challenges faced by the organic growers in Kathmandu valley. This study aimed to explore the status of organic farming, attitudes of farmers towards organic farming, their suggestions for improvement, and strengthening the value chain of organic products. Face-to-face interviews were conducted at Agriculture Knowledge Centre, Lalitpur, Nepal during December 2019 with 37 organic growers directly or indirectly involved in organic farming. The results showed that organic growers …
Application Of Drone And Worldview-4 Satellite Data In Mapping And Monitoring Grazing Land Cover And Pasture Quality: Pre- And Post-Flooding, Clement E. Akumu, Eze O. Amadi, Samuel Dennis
Application Of Drone And Worldview-4 Satellite Data In Mapping And Monitoring Grazing Land Cover And Pasture Quality: Pre- And Post-Flooding, Clement E. Akumu, Eze O. Amadi, Samuel Dennis
Agricultural and Environmental Sciences Faculty Research
Frequent flooding worldwide, especially in grazing environments, requires mapping and monitoring grazing land cover and pasture quality to support land management. Although drones, satellite, and machine learning technologies can be used to map land cover and pasture quality, there have been limited applications in grazing land environments, especially monitoring land cover change and pasture quality pre- and post-flood events. The use of high spatial resolution drone and satellite data such as WorldView-4 can provide effective mapping and monitoring in grazing land environments. The aim of this study was to utilize high spatial resolution drone and WorldView-4 satellite data to map …
Economic Sustainability And Multiple Risk Management Strategies: Examining Interlinked Decisions Of Small American Farms, Sudip Adhikari, Aditya R. Khanal
Economic Sustainability And Multiple Risk Management Strategies: Examining Interlinked Decisions Of Small American Farms, Sudip Adhikari, Aditya R. Khanal
Agricultural and Environmental Sciences Faculty Research
Economic viability of small farms and farming businesses depends on multiple factors. These farms have limited production and financial resources to maintain their operation. Therefore, to sustain farming, adopting appropriate risk management strategies is a pivotal decision for small farmers. We surveyed Tennessee’s small farms and utilized multivariate probit models to study factors influencing the adoption of various risk management strategies. Our findings suggest that the decisions related to the adoption of risk management strategies are significantly interlinked. Along with factors representing the operator’s age, education, and farm operator’s income and land holdings, we also found that the government incentives …