Navigation Links
Research on satellite imagery aims to advance sustainable agriculture
Date:4/1/2011

CORDOBA, SPAINIrrigating agricultural crops places huge demands on water resources around the globe. In Spain for instance, where agriculture is a major contributor to the nation's economy, 85% of country's total water demand comes from the agricultural sector. The excessive use of irrigation water has resulted in serious environmental concerns in Mediterranean countries, where rising demand has deteriorated groundwater resources, depleted aquifers, and accelerated saltwater intrusion. Scientists in Spain are working on new technologies to classify and monitor irrigated crops with a goal of promoting sustainable agricultural practices.

"To encourage sustainable use of water resources, it is essential to develop advanced and accurate tools to classify and monitor irrigated crops and to estimate the surface occupied by each irrigated crop, each of which usually has different water requirements", said Francisca Lpez-Granados, lead author of a study published in a recent issue of the Journal of the American Society for Horticultural Science. Lpez-Granados and a team of researchers reported on field studies they designed to evaluate the potential of multispectral reflectance and seven vegetation indices in the visible and near-infrared spectral range for discriminating and classifying bare soil and several horticultural irrigated crops. According to the scientists, the research is the first step of a broader project with the overall goal of using satellite imagery with high spatial and multispectral resolutions for mapping irrigated crops.

The team collected on-ground reflectance data of bare soil and annual herbaceous crops (garlic, onion, sunflower, bean, maize, potato, winter wheat, melon, watermelon and cotton), perennial herbaceous crops (alfalfa and asparagus), deciduous trees (plum), and non-deciduous trees (citrus and olive) using a handheld field spectroradiometer in spring, early summer, and late summer. They applied three classification methods to discriminate differences in reflectance between the crops and bare soil: stepwise discriminant analysis and two artificial neural networks (multilayer perceptron and radial basis function).

"The results of the three classification methods showed that the highest percentage of accuracy was achieved with multilayer perceptron (MLP), followed by stepwise discriminant analysis and radial basis function (RBF)", said Lpez-Granados. The classification matrix from the MLP model using cross-validation showed that most crops discriminated in spring and late summer were 100% classifiable; the best overall classification was obtained in late summer, when fewer crop species were available.

"Our results show that the MLP model identified and recognized the differences between spectral signatures of bare soil and the most important horticultural irrigated herbaceous and tree crops at spring and late summer. They also indicate that the MLP neural network model should be considered for a successful classification of remote sensed data," concluded Lpez-Granados. "For future research, we recommend acquiring two multispectral satellite images taken in spring and late summer for monitoring and mapping these irrigated crops, thus avoiding costly field surveys".


'/>"/>

Contact: Michael W. Neff
mwneff@ashs.org
703-836-4606
American Society for Horticultural Science
Source:Eurekalert

Related biology news :

1. Office of Naval Research Supports Exercise at Arctic Test Range
2. From science fiction to research breakthrough
3. UC Riverside researcher receives $9 million USDA grant to study potato and tomato disease
4. Berkeley Lab researchers make first perovskite-based superlens for the infrared
5. ARVO Foundation for Eye Research honors Deisseroth with first Ludwig von Sallman Clinician-scientist Award
6. Kentucky researchers find a key to plant disease resistance
7. Cystic Fibrosis Foundation funds Marshall research
8. Research proves no 2 of us are alike, even identical twins
9. Altitude Research Center wins major Pentagon grants
10. Interventional radiologists advance MS research: Vein-opening treatment safe
11. Research shows not only the fittest survive
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:3/11/2016)... India , March 11, 2016 ... a new market research report "Image Recognition Market by ... Application (Marketing and Advertising), by Deployment Type (On-Premises and ... Forecast To 2022", published by MarketsandMarkets, the global market ... 2015 to USD 29.98 Billion by 2020, at a ...
(Date:3/9/2016)... March 9, 2016 This BCC Research report ... of the RNA Sequencing (RNA Seq) market for the ... instruments, tools and reagents, data analysis, and services. ... of the RNA-Sequencing market such as RNA-Sequencing tools and ... main factors affecting each segment and forecast their market ...
(Date:3/8/2016)... , March 8, 2016   Valencell ... technology, today announced it has secured $11M in ... GII Tech, a new venture fund being launched ... additional participation from existing investors TDF Ventures and ... funds to continue its triple-digit growth and accelerate ...
Breaking Biology News(10 mins):
(Date:5/19/2016)... , May 19, 2016  AdvancedFlow Systems Inc. ... (AGI), based out of Maple Ridge, ... Ltd. to its existing portfolio of contract manufacturing ... AFS along with its sister companies Surround Technologies ... vertically integrated industrial group that specializes in providing ...
(Date:5/19/2016)... Kansas City, KS (PRWEB) , ... May 19, ... ... and biomarker contract research organization (CRO) has welcomed Abu Siddiqui as Director, Large ... designing, managing and executing biologics, vaccine and translational biomarker discovery studies for preclinical ...
(Date:5/19/2016)... -- - I dati saranno presentati nel ... ° Congresso della Società Americana ... - Le conclusioni dello studio indicano un tasso di risposta ... il 90% presenta una d urata della risposta (Duration ... per cento dei pazienti ha riscontrato un beneficio clinico. ...
(Date:5/18/2016)... ... May 18, 2016 , ... ... Camp at The University of Toledo. This two-day camp will take place annually ... explore the field of pharmaceutical sciences in preparation for a university academic program. ...
Breaking Biology Technology: