Results 81 to 90 of about 193,077 (311)

Evaluation of statistical and geostatistical models of digital soil properties mapping in tropical mountain regions

open access: yesRevista Brasileira de Ciência do Solo, 2014
Soil properties have an enormous impact on economic and environmental aspects of agricultural production. Quantitative relationships between soil properties and the factors that influence their variability are the basis of digital soil mapping.
Waldir de Carvalho Junior   +4 more
doaj   +1 more source

Tracing sources of cadmium in agricultural soils: a stable isotope approach [PDF]

open access: yes, 2018
Cadmium (Cd) is a biotoxic heavy metal, which is accumulated by plants and animals and thereby enters the human food chain (Gray et al. 2003). The application of phosphate fertilisers has also resulted in the long-term accumulation of Cd in agricultural ...
Salmanzadeh, Mahdiyeh
core  

Multiscale Soil Investigations: Physical Concepts And Mathematical Techniques [PDF]

open access: yes, 2008
Soil variability has often been considered to be composed of “functional” (explained) variations plus random fl uctuations or noise. However, the distinction between these two components is scale dependent because increasing the scale of ...
A. M. Tarquis   +31 more
core   +2 more sources

Transcription Factor Promiscuity Drives Regulatory Rewiring and Evolvability in Gene Networks in Bacteria

open access: yesAdvanced Science, EarlyView.
When a master transcription factor (TF) is lost, bacteria can rapidly rewire gene regulatory networks by co‐opting related regulators. Using experimental evolution in Pseudomonas fluorescens, we show that TF promiscuity (low‐level, non‐cognate binding) provides the raw material for rewiring. Successful co‐option follows a predictable hierarchy governed
Tiffany B. Taylor, Alan M. Rice
wiley   +1 more source

A comparative Digital Soil Mapping (DSM) study using a non-supervised clustering analysis and an expert knowledge based model - A case study from Ahuachapán, El Salvador [PDF]

open access: yes, 2020
DSM is the inference of spatial and temporal soil property variations using mathematical models based on quantitative relationships between environmental information and soil measurements.
Casares, Francisco   +5 more
core   +1 more source

Visible and near infrared spectroscopy in soil science [PDF]

open access: yes, 2010
This chapter provides a review on the state of soil visible–near infrared (vis–NIR) spectroscopy. Our intention is for the review to serve as a source of up-to date information on the past and current role of vis–NIR spectroscopy in soil science.
Mouazen, Abdul Moune   +3 more
core   +1 more source

Recent Advances in Laser‐Induced Graphene‐Based Gas Sensors: From Sensing Mechanisms to Biomedical Applications

open access: yesAdvanced Science, EarlyView.
Laser‐induced graphene (LIG) provides a scalable, laser‐direct‐written route to porous graphene architecture with tunable chemistry and defect density. Through heterojunction engineering, catalytic functionalization, and intrinsic self‐heating, LIG achieves highly sensitive and selective detection of NOX, NH3, H2, and humidity, supporting next ...
Md Abu Sayeed Biswas   +6 more
wiley   +1 more source

Comparing the Ability of Conventional and Digital Soil Maps to Explain Soil Variability using Diversity Indices

open access: yesمجله آب و خاک, 2017
Introduction: Effective and sustainable soil management requires knowledge about the spatial patterns of soil variation and soil surveys are important and useful sources of data that can be used.
zohreh mosleh   +3 more
doaj   +1 more source

Quantification of soil mapping by digital analysis of LANDSAT data [PDF]

open access: yes
Soil survey mapping units are designed such that the dominant soil represents the major proportion of the unit. At times, soil mapping delineations do not adequately represent conditions as stated in the mapping unit descriptions.
Hinzel, E. J.   +4 more
core   +1 more source

Multi-hazard risk assessment using GIS in urban areas: a case study for the city of Turrialba, Costa Rica [PDF]

open access: yes, 2002
In the framework of the UNESCO sponsored project on “Capacity Building for Natural Disaster Reduction” a case study was carried out on multi-hazard risk assessment of the city of Turrialba, located in the central part of Costa Rica.
Badilla Coto, Elena   +3 more
core   +4 more sources

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