منابع مشابه
Measuring soil moisture with imaging radars
An empirical algorithm for the retrieval of soil moisture content and surface Root Mean Square (RMS) height from remote.ly sensed radar data was developed using scatterorneter data. The algorithm is optimized for bare surfaces and requires two co-polarized channels at a frequency between 1.5 G1lz and 11 GHz. It gives best results for kh <2.5, p, < 35% and 0230° Omitting the usually weaker hv-po...
متن کاملEvaluation and Calibration of a Soil Moisture Sensor for Measuring Poultry Manure or Litter Moisture Content
Moisture content (MC) of poultry manure or litter affects its ammonia (NH 3 ) emissions. Relating MC to ammonia emission of manure or litter is thus of importance to modeling and/or managing ammonia emissions from the manure sources. Development of such relationships would require the knowledge of ammonia emission and the concomitant MC of the manure or litter. This work was carried out to char...
متن کاملInvestigating the Effect of Soil Organic Matter on Gypsum Block Calibration for Measuring Soil Volumetric Moisture Content
Continuous soil moisture assessment and evaluation is essential for irrigation management and planning. One of the common methods for measuring the moisture content of the soil is the use of a gypsum block. The use of gypsum blocks in some cases, including the presence of organic matter in soil, may cause an error in the measurement of moisture. For this purpose, a laboratory study was conducte...
متن کاملSpatial soil moisture scaling structure during Soil Moisture Experiment 2005
Soil moisture state and variability control many hydrological and ecological processes as well as exchanges of energy and water between the land surface and the atmosphere. However, its state and variability are poorly understood at spatial scales larger than the fields (i.e. 1 km2) as well as the ability to extrapolate field scale to larger spatial scales. This study investigates soil moisture...
متن کاملSoil Moisture Content
The assessment of soil moisture content and surface roughness from remotely sensed data is of primary importance for improving agricultural techniques of conservation farming such as yield forecasts, scheduling irrigations, fertilization. SAR (Synthetic Aperture Radar) remotely sensed data may provide a powerful tool for indirectly retrieving these agricultural surface parameters over large are...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Eos, Transactions American Geophysical Union
سال: 2002
ISSN: 0096-3941
DOI: 10.1029/eo083i033p00358-05