Filters: Tags: Cultivation (X)
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This map service is an information surface representing the amount of available water storage (AWS) that is available to plants in the top 50cm (1.64 Feet) of soil. Available Water Storage (AWS) is expressed as centimeters of water, reported as the average of all components in the map unit. AWS is calculated from AWC (Available Water Capacity) which is commonly estimated as the difference between the water contents at 1/10 or 1/3 bar (field capacity) and 15 bars (permanent wilting point) tension, and adjusted for salinity and fragments. Available Water Storage (AWS) surfaces are available through arcgis.com for four soil depths, 25, 50, 100, and 150 centimeters from the surface of the soil. They are available...
Categories: Data;
Types: ArcGIS REST Map Service,
Map Service;
Tags: Cultivation,
moisture,
soil,
storage,
vegetables,
A natural rainfall study was conducted to evaluate the effect of tillage and herbicide application methods on crop residue cover, surface runoff volume, erosion, and herbicide losses with sediment and runoff water. Sediment, water, and three herbicides (atrazine [(6-chloro-N-ethyl)-N-(1-methylethyl-1,3,5 triazine)-2-4-diamine], metolachlor [2-chloro-N-(2-ethyl-6-methylphenyl)-N-(2-methoxy-1-methylethyl)], and cyanazine [2-{{4-chloro-6-(ethylamino)-1,3,4-triazin-2-yl}amino}-2-methylpropionitrile]) losses were measured from continuous corn runoff plots (1.7×12.0 m long) in 1993 and 1994. Four tillage/herbicide application treatments were studied: no-till/herbicide broadcast sprayed (NT), fall chisel plow-spring disk/herbicide...
Categories: Publication;
Types: Citation;
Tags: Cultivation,
Data Visualization & Tools,
Herbicide application methods,
Herbicide losses with runoff,
Landscapes,
This map service is an information surface representing the amount of available water storage (AWS) that is available to plants in the top 100cm (3.28 Feet) of soil. Available Water Storage (AWS) is expressed as centimeters of water, reported as the average of all components in the map unit. AWS is calculated from AWC (Available Water Capacity) which is commonly estimated as the difference between the water contents at 1/10 or 1/3 bar (field capacity) and 15 bars (permanent wilting point) tension, and adjusted for salinity and fragments. Available Water Storage (AWS) surfaces are available through arcgis.com for four soil depths, 25, 50, 100, and 150 centimeters from the surface of the soil. They are available...
Categories: Data;
Types: ArcGIS REST Map Service,
Map Service;
Tags: Cultivation,
SSURGO,
availble moisrue,
porosity,
soil,
Pulses of water availability characterize semiarid and arid ecosystems. Most precipitation events in these ecosystems are small (?10 mm), but can stimulate carbon flux. The large proportion of carbon stored belowground and small carbon inputs create the potential for these small precipitation events to have large effects on carbon cycling. Land-use change can modify these effects through alteration of the biota and soil resources. The goal of our research was to determine how small precipitation events (2, 5, and 10 mm) affected the dynamics of soil carbon flux and water loss in previously cultivated Conservation Reserve Program (CRP) fields and undisturbed shortgrass steppe. Total carbon loss and duration of elevated...
Categories: Publication;
Types: Citation,
Journal Citation;
Tags: Conservation Reserve Program (CRP),
Cultivation,
Ecological Research,
Land-use change,
Semiarid and arid ecosystems,
This map service is an information surface which displays the (nonirrigated) land capability class of each soil map unit based upon the dominant component in the soil map unit. Every soil component in the United States may be classified under one of the following land capability class categories: 1. Soils have slight limitations that restrict their use. 2. Soils have moderate limitations that reduce the choice of plants or require moderate conservation practices. 3. Soils have severe limitations that reduce the choice of plants or require special conservation practices, or both. 4. Soils have very severe limitations that restrict the choice of plants or require very careful management, or both. 5. Soils have...
Categories: Data;
Types: ArcGIS REST Map Service,
Map Service;
Tags: Cultivation,
Non-irrigated,
cultivated,
dryland farming,
soil,
Understanding spatial and temporal variation in net primary production (NPP), the amount of carbon fixed into biomass by vegetation, is a central goal of ecosystem ecologists. Optical remote sensing techniques can help address this need by providing accurate, consistent, and reliable approximations of photosynthetic activity at large scales. However, converting photosynthetic activity into NPP requires estimates of light-use efficiency, which has been shown to vary among vegetation types. In this study, we compare remotely sensed estimates of absorbed photosynthetically active radiation with ground-based NPP estimates to determine appropriate light-use efficiency values for grasslands and croplands. We contrast...
Categories: Publication;
Types: Citation,
Journal Citation;
Tags: Remote Sensing of Environment,
absorbed photosynthetically active radiation,
croplands,
cropping,
cultivation,
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