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For the United States to effectively manage its remaining wetlands, their abundance, distribution, boundaries, and inherent characteristics must be better understood. As natural resource management becomes more holistic and moves towards ecosystem management, the synoptic view that remotely sensed data provide will become increasingly important. Remote observation of wetlands is particularly necessary because they are often difficult to access on the ground, and on-site mapping at the landscape scale is usually cost prohibitive. Remotely sensed images aid our understanding of wetlands within a wider landscape setting and help to ensure wetland preservation via an increased appreciation of the services that wetlands...
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The objective of this research was to investigate the effect of charring on near infrared spectra of materials likely to be present in forest fires in order to determine the feasibility of determining charred carbon in soils. Four materials (cellulose, lignin, pine bark and pine wood) and char from these materials created by charring for various durations (1 to 168 h) and at various temperatures (200 to 450°C) were studied. Near infrared spectra and measures of acidity (total acids, carboxylic acids, lactones and phenols as determined by titration) were available for 56 different samples (Not all samples charred at all temperatures/durations). Results showed spectral changes that varied with the material, temperature...
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The objective of this research was to investigate the effect of charring on near infrared spectra of materials likely to be present in forest fires in order to determine the feasibility of determining charred carbon in soils. Four materials (cellulose, lignin, pine bark and pine wood) and char from these materials created by charring for various durations (1 to 168 h) and at various temperatures (200 to 450°C) were studied. Near infrared spectra and measures of acidity (total acids, carboxylic acids, lactones and phenols as determined by titration) were available for 56 different samples (Not all samples charred at all temperatures/durations). Results showed spectral changes that varied with the material, temperature...
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To best preserve wetlands and associated ecosystem services, wetlands must be routinely monitored. Wetland mapping is an essential part of this monitoring program. Recently developed remote-sensing technologies and techniques have the potential to improve the detail and reliability of wetland maps and the ability to monitor important drivers of wetland condition and function, such as hydrology. One of these relatively new and reapidly developing technologies is laser altimetry, or light detection and ranging (LiDAR), which provides fine-scale information regarding 3-D topography, vegetation height, and plant structure, as well as hydropattern, across large areas.
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This data release includes winter cover crop field sampling data (2006-2021) collected from Maryland farms, along with two seasons of Maryland cost-share program field enrollment data (2019-20 and 2020-21) and associated satellite-derived vegetation index values, supporting the remote sensing analysis of winter cover crop environmental performance on fields receiving incentive payments. Files include: 1. CoverCropFieldData.csv - containing springtime field sampling data collected from 2006 to 2021 at the USDA ARS Beltsville Agricultural Research Center, Beltsville, Maryland, and from working farms on the Delmarva Peninsula, Maryland. 2. Maryland_20192020EnrollmentData.csv - containing winter cover crop cost-share...
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