Tag: Daniel R. Dourte

Opciones de gestion agronomica para la variabilidad y para el cambio climatico: El riego localizado (HS1212)

Figure 1. Riego por goteo aplicado a la superficie para la producción de fresas. Créditos: Lincoln ZotarelliEsta publicación se enfoca en el uso del riego localizado para mejorar los sistemas de producción. This 5-page fact sheet was written by Lincoln Zotarelli, Clyde Fraisse, and Daniel Dourte, and published by the UF Department of Horticultural Sciences, January 2013.
http://edis.ifas.ufl.edu/hs1212

Agricultural Management Options for Climate Variability and Change: High-Residue Cover Crops (AE488)

Figure 2. Custom roller/strip-till implement by Myron Johnson of Headland, Alabama. While decision making in agriculture involves many aspects beyond climate, including economics, social factors, and policy considerations, climate-related risks are a primary source of yield and income variability. This 4-page fact sheet focuses on the use of high-biomass winter cover crops to improve production systems. Written by Joel Love, Jed Dillard, Kirk Brock, Daniel Dourte, and Clyde Fraisse, and published by the UF Department of Agricultural and Biological Engineering, August 2012.
http://edis.ifas.ufl.edu/ae488

Agricultural Management Options for Climate Variability and Change: Sod-Based Rotation (AE492)

A sod-based rotation is when a producer adapts a conventional peanut/cotton rotation by growing a perennial grass, such as bahiagrass, during two years of the rotation. The perennial grass can be grazed, cut for hay or harvested for seed for additional income. Using a sod-based rotation can improve soil water-holding capacity and potentially reduce impacts of dry spells and droughts. This 4-page fact sheet was written by David Wright, Jim Marois, Clyde Fraisse, and Daniel Dourte, and published by the UF Department of Agricultural and Biological Engineering, August 2012. http://edis.ifas.ufl.edu/ae492

Agricultural Management Options for Climate Variability and Change: Variable-Rate Irrigation (AE490)

Figure 1. Example of management zones in an irrigated field having substantial variability in soil properties and planted areas. Colored zones indicate areas where irrigation is reduced or eliminated.Most fields are not uniform because of natural variations in soil type or topography. When water is applied uniformly to a field, some areas of the field may be overwatered while other areas may remain too dry. Variable-rate irrigation technology gives farmers an automated method to vary rates of irrigation water based on the individual management zones within a field and avoid irrigating roadways, waterways, wetlands, and other non-farmed areas within a pivot. This 3-page fact sheet was written by Calvin Perry, Clyde Fraisse, and Daniel Dourte, and published by the UF Department of Agricultural and Biological Engineering, July 2012.
http://edis.ifas.ufl.edu/ae490

Agricultural Management Options for Climate Variability and Change: Sensor-Based, Variable-Rate Nitrogen Management (AE487)

Clemson-designed variable-rate nitrogen applicator that does not have onboard sensors; NDVI data were collected in a previous trip across the field (right).Nitrogen fertilizer cost represents about 10%–15% of total farm costs for corn, cotton, and wheat in the Southeastern United States. The efficiency of nitrogen use can be highly variable for producers, so a sensor-based, variable-rate nitrogen application (SVNA) system has been developed for irrigated and dryland row crops to reduce production costs. Using sensor-based N application, there is a minimum 20% reduction in N usage. If that rate reduction were applied to all the cotton, corn, and wheat grown in the United States, CO2 emissions from N fertilizer production would be decreased by 2.7 million tons.
This 4-page fact sheet was written by Wesley Porter, Ahmad Khalilian, Daniel Dourte, and Clyde Fraisse, and published by the UF Department of Agricultural and Biological Engineering, July 2012.
http://edis.ifas.ufl.edu/ae487

Agricultural Management Options for Climate Variability and Change: Microirrigation (HS1203)

Figure 1. Drip irrigation applied at the surface for strawberry productionMicroirrigation is the slow, frequent application of water directly to relatively small areas adjacent to individual plants through emitters placed along a water delivery line. A leading advantage of microirrigation is that evaporation that does not contribute to plant growth much less than with sprinkler irrigation. This 5-page fact sheet was written by Lincoln Zotarelli, Clyde Fraisse, and Daniel Dourte, and published by the UF Department of Horticultural Sciences, July 2012.
http://edis.ifas.ufl.edu/hs1203

Agricultural Management Options for Climate Variability and Change: Conservation Tillage (AE486)

Figure 3. Cover crop rolling and strip tillage in preparation for planting; note the substantial plant residues maintained on the soil surface. Custom roller/strip-till unit by Myron Johnson of Headland, AL.This 4-page fact sheet focuses on the use of conservation tillage in crop production systems as a strategy to minimize the risks associated with climate variability and change and to improve resource-use efficiency. Written by Kip Balkcom, Leah Duzy, Daniel Dourte, and Clyde Fraisse, and published by the UF Department of Agricultural and Biological Engineering, June 2012.
http://edis.ifas.ufl.edu/ae486

What is a Water Footprint?: An Overview and Applications in Agriculture (AE484)

Figure 1. Green, blue, and grey water flows in an agricultural system.Agriculture is by far the largest global consumer of freshwater. Comparing water footprints of different management practices in agriculture can help evaluate drought tolerance, water use efficiency, the effective use of rainfall, and the significance of irrigation. Scientists are thinking about ways to adapt agricultural systems to a changing climate, especially precipitation changes, so the water footprint is a useful measure to compare resilience of agricultural systems to droughts and dry spells. This 11-page fact sheet was written by Daniel R. Dourte and Clyde W. Fraisse, and published by the UF Department of Agricultural and Biological Engineering, January 2012.
http://edis.ifas.ufl.edu/ae484