Results 91 to 100 of about 33,462 (282)

Towards a universal lidar canopy height indicator

Canadian Journal of Remote Sensing, 2006
A light detection and ranging (lidar) canopy height study was conducted with 13 datasets collected using four different models of airborne laser terrain mapper (ALTM) sensors over 13 widely variable vegetation types ranging in average height from
Chris Hopkinson, Laura Chasmer, Kevin Lim, Paul Treitz, Irena Creed   +4 more
openaire   +1 more source

The nitrogen dilemma: Toward a novel fertilization management framework for reconciling productivity and diversity in grasslands

Grassland Research, EarlyView.
Nitrogen fertilization raises grassland productivity but steadily undermines plant diversity. Instead of applying the same rate everywhere every year, the PRISM framework is designed to rotate high‐ and low‐nitrogen paddocks across the farm over time. This spatiotemporal cycling aims to maintain farm‐scale productivity while creating periodic windows ...
André Fischer Sbrissia, Marilia Barbosa Chiavegato, Daniel Augusto Barreta, Sila Carneiro Da Silva, Maria Gabriela Pittaro, Rodrigo Amorim Barbosa   +5 more
wiley   +1 more source

Mapping Forest Height and Temporal Decorrelation With SAOCOM and GEDI Data

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
Polarimetric SAR interferometric (PolInSAR) methods have proven effective for estimating canopy height using airborne data, yet their application with spaceborne sensors remains limited.
Santiago Seppi, Carlos Lopez-Martinez, Marisa Jacqueline Joseau   +2 more
doaj   +1 more source

Smart Sensor‐Integrated Lysimeter System for Affordable on‐Farm Crop Water Monitoring and Irrigation Management

Irrigation and Drainage, EarlyView.
ABSTRACT Accurate monitoring of crop water use is critical for precision irrigation, yet conventional lysimeter systems remain too costly and complex for widespread adoption. This study presents the development and field validation of a low‐cost, information and communication technology (ICT)‐enabled weighing lysimeter system that integrates load cells,
Stephen Okwang, Younggu Her, Taeil Jang
wiley   +1 more source

Drought Risk in Mango and Avocado Orchards: Insights Into Plant Water Relations and Irrigation‐Related Agronomic Solutions

Irrigation and Drainage, EarlyView.
ABSTRACT Climate change is making water availability more uncertain, with growing consequences for the productivity and long‐term sustainability of tropical and subtropical fruit orchards. Mangifera indica L. and Persea americana Mill. both require large amounts of water to sustain growth and productivity.
Eleonora Cataldo
wiley   +1 more source

On the Change of Plant Canopy Height with Wind Velocity

Journal of Agricultural Meteorology, 1969
A following relation between roughness lenghth (Z0) and zero-plane displacement (d) in the wind profile of very rough surfaces has been deduced recently (TAKEDA, 1966):lnH-d/Z0=k2/αH-d/H (1)where k=0.4 (von Karuman's constant), α=0.087 and H denotes the roughness height.
TAKAMI, Shinichi, MAKI, Taichi
openaire   +2 more sources

Variable Rate Irrigation: A Long‐Term Simulated and Field Data Analyses of Irrigation Practices, Field Variability, Economic Feasibility and Profitability

Irrigation and Drainage, EarlyView.
ABSTRACT Long‐term economic analyses of variable rate irrigation (VRI) strategies were performed compared with uniform irrigation management (UIM) in a reference production field using the AquaCrop model. Five strategies to trigger irrigation were as follows: (Field Capacity‐VRI, Driest Soil Trigger‐VRI, Water Mining‐VRI, Conventional Uniform ...
Sahil Sharma, Suat Irmak, William Kranz
wiley   +1 more source

Mapping Forest Canopy Fuels in the Western United States with LiDAR–Landsat Covariance

Remote Sensing, 2020
Comprehensive spatial coverage of forest canopy fuels is relied upon by fire management in the US to predict fire behavior, assess risk, and plan forest treatments.
Christopher J. Moran, Van R. Kane, Carl A. Seielstad   +2 more
doaj   +1 more source

Characterising City Scale Heat Climatology for Australian Climate Zones

International Journal of Climatology, EarlyView.
The Urban Heat Island (UHI) effect in Australian cities peaks at night, intensifying under dry conditions, clear skies, increased solar radiation, and low wind speeds. Long‐term observations show that nighttime temperatures in major cities have warmed faster than their rural surroundings and future climate projections fail to capture this disparity ...
Vihan C. N. Weeraratne, Nikhil Garg, Raymond C. Z. Cohen, Valentijn R. N. Pauwels, Mahesh Prakash   +4 more
wiley   +1 more source

Wall‐to‐wall Amazon forest height mapping with Planet NICFI, Aerial LiDAR, and a U‐Net regression model

Remote Sensing in Ecology and Conservation
Tree canopy height is a key indicator of forest biomass, productivity and structure, yet measuring it accurately at regional or larger scales, whether from the ground or remotely, remains challenging.
Fabien H. Wagner, Ricardo Dalagnol, Griffin Carter, Mayumi C. M. Hirye, Shivraj Gill, Le Bienfaiteur Sagang Takougoum, Samuel Favrichon, Michael Keller, Jean P. H. B. Ometto, Lorena Alves, Cynthia Creze, Stephanie P. George‐Chacon, Shuang Li, Zhihua Liu, Adugna Mullissa, Yan Yang, Erone G. Santos, Sarah R. Worden, Martin Brandt, Philippe Ciais, Stephen C. Hagen, Sassan Saatchi   +21 more
doaj   +1 more source