نتایج جستجو برای: soil classification

تعداد نتایج: 667784  

Journal: :Remote Sensing 2015
Shuo Li Wenjun Ji Songchao Chen Jie Peng Yin Zhou Zhou Shi

To meet growing food demand with limited land and reduced environmental impact, soil testing and formulated fertilization methods have been widely adopted around the world. However, conventional technology for investigating nitrogen fertilization rates (NFR) is time consuming and expensive. Here, we evaluated the use of visible near-infrared shortwave-infrared (VIS-NIR-SWIR: 400–2500 nm) spectr...

Journal: Desert 2012
Gh.R. Zehtabian H.R. Matinfar M. Shirazi S.K. Alavipanah

Soil Salinity has been a large problem in arid and semi arid regions. Preparation of such maps is useful for Natural resource managers. Old methods of preparing such maps require a lot of time and cost. Multi-spectral remotely sensed dates due to the broad vision and repeating of these imageries is suitable for provide saline soil maps. This investigation is conducted to provide saline soil map...

Journal: :مدیریت اراضی 0
کامی کابوسی گروه مهندسی آب، واحد گرگان، دانشگاه آزاد اسلامی، گرگان، ایران

this study was conducted to investigate the characteristics of input and output wastewater of the bandargaz wastewater treatment plant on the basis of the data collected during operation and the samples taken during the study period. for this purpose, three samples were taken from the outflow wastewater and 25 quality parameters were tested. also, four soil samples were taken from the soils whi...

Journal: :Ecology 2007
Noah Fierer Mark A Bradford Robert B Jackson

Although researchers have begun cataloging the incredible diversity of bacteria found in soil, we are largely unable to interpret this information in an ecological context, including which groups of bacteria are most abundant in different soils and why. With this study, we examined how the abundances of major soil bacterial phyla correspond to the biotic and abiotic characteristics of the soil ...

2007
Raphael Linker

The need for rapid and inexpensive techniques for soil characterization has led to the investigation of modern technologies, and in particular those based on reflectance spectroscopy. While near-infrared has been traditionally used, midinfrared in the 400-4000 cm-1 range is becoming increasingly common due to the specificity of the absorbance bands in this spectral range. The present work discu...

2000
J. J. Fridgen

Site-specific management requires the development of agronomic strategies for sub-field management zones that are subject to a unique combination of potential yield-limiting factors. Creation of unique management areas has focused mainly on soil type surveys, yield mapping, and soil fertility management based on grid soil sampling. This paper discusses the use of the fuzzy k-means unsupervised ...

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