Navigation Links
Digital cameras, remote satellites measure crop water demand
Date:7/17/2008

FRESNO, CA - Horticultural crops account for almost 50% of crop sales in the United States, and these crops are carefully managed to ensure good quality. But more information is needed about the crops' growth and response to seasonal and climatic changes so that management practices such as irrigation can be precisely scheduled. Existing research can be difficult to generalize because of variations in crops, planting densities, and cultural practices.

Determining growth stage, size, and water needs are especially important for horticultural crops because most crops are grown in limited water environments and require irrigation. The measurement of "canopy light interception" is a primary means of determining water and irrigation needs. Fractional canopy cover (CC) is a relatively easily measured property that is a good indicator of light interception. Canopy cover, the percent of the soil surface covered by plant foliage, is an important indicator of stage of growth and crop water use in horticultural crops. Methods of using remote sensors to determine canopy cover in major crops have been studied for years, but the studies have not included most horticultural crops.

Thomas J. Trout, Research Leader at the U.S. Department of Agriculture's Agricultural Research Service, along with colleagues from the NASA Earth Science Division, recently published a study that addresses the relationship of remotely sensed normalized difference vegetation index (NDVI) relative to canopy cover of several major horticultural crops in commercial fields.

The research team measured canopy cover of 11 different annual and perennial horticultural crops in various growth stages on 30 fields in California's San Joaquin Valley with a handheld multispectral digital camera. Canopy cover was compared with NDVI values calculated from Landsat 5 satellite imagery. According to Trout, "The NDVI was highly correlated and linearly related with measured CC across the wide
'/>"/>

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

Page: 1 2

Related biology news :

1. Entrust Digital Signatures Help Secure More Than 18 Million U.S. ePassports
2. Book is the first high-resolution digital mouse brain atlas designed for Web applications
3. FEBS Letters Structured Digital Abstracts experiment
4. Vobile Launches VideoDNA Live; Enables Real-Time Digital Content Protection for Live Broadcast Events
5. Fixing the education digital disconnect one video game at a time
6. New golden frog discovered in remote region of Colombia
7. Parus Interactive Awarded Patent for Speech-Activated Remote System Management
8. MIT: Remote-control nanoparticles deliver drugs directly into tumors
9. Climates remote control on hurricanes
10. Harlequin frog rediscovered in remote region of Colombia
11. Satellites witness lowest Arctic ice coverage in history
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Digital cameras, remote satellites measure crop water demand
(Date:9/16/2014)... XL pipeline (KXL) would likely increase oil sands extraction, ... by the non-profit organization Near Zero. The results are ... and includes both supporters and opponents of the pipeline. ... could lead to significantly higher greenhouse gas emissions, with ... , "This report examines three main scenarios discussed ...
(Date:9/16/2014)... DURHAM, N.H. From the salmon-rich waters of Southeast ... Coast to Downeast Maine,s lobster, lumber and tourist towns, ... their views about coastal environments divide along political lines. ... University of New Hampshire sociologists published this month in ... "We found a lot of environment-related differences from place ...
(Date:9/16/2014)... 2014  Valencell, Inc., a leader in performance biometric ... 18 "Showcase Companies" representing North Carolina,s ... Tech Venture Conference on September 16-17 th at ... Raleigh, North Carolina . Valencell,s President ... during the "Digital Health Spotlight Sector" on how the ...
Breaking Biology News(10 mins):Keystone XL would likely raise oil sands production and greenhouse gas emissions 2Politics divide coastal residents' views of environment, UNH research finds 2Politics divide coastal residents' views of environment, UNH research finds 3Valencell, Inc. Selected as 'Showcase Company' at CED Tech Venture Conference 2014 2
... researchers will embark on an unconventional approach to DNA research ... for the ideas to explore scientific frontiers. Chemist Patrick ... were the youngest researchers chosen among several hundred applicants. They ... a senior scientist, growth biology Prof. Rod Hill. The ...
... A long-term field and DNA study by the ... University of Miami, Field Museum of Chicago and others ... Bimini islands, Bahamas, tend to stay near their coastal ... typically focuses on baby sharks confined to shallow habitats, ...
... produced more cheaply using nanoparticle "inks" that allow them ... sides of buildings or rooftops to absorb electricity-producing sunlight. ... chemical engineer, is hoping to cut costs to one-tenth ... process for solar cells gas-phase deposition in a ...
Cached Biology News:Idaho researchers win grant to explore DNA frontier 2Scientists shed new light on behavior of shark 'tweens' and 'teenagers' 2Scientists shed new light on behavior of shark 'tweens' and 'teenagers' 3Lower-cost solar cells to be printed like newspaper, painted on rooftops 2
(Date:9/16/2014)... According to Jeff Howell, Partner of Nidea Corporate ... development in Downtown Toronto is expanding at a blistering ... storeys of new development last week (including three new ... the Toronto skyline for the foreseeable future in a ... new development. , As the Toronto city council met ...
(Date:9/15/2014)... UPTON, NYHeat drives classical phase transitionsthink solid, ... happen when the temperature drops. If phase ... where quantum mechanics reigns, subtle fluctuations can ... from the U.S. Department of Energy,s Brookhaven ... explored this frigid landscape of absolute zero ...
(Date:9/15/2014)... United States (PRWEB) September 16, 2014 ... Inhibitors, Cancer Vaccines, and Adoptive T-cell Therapies is ... This report focuses on the three principal types ... of research and development in cancer immunotherapy (which ... inhibitors, Therapeutic anticancer vaccines and Adoptive cellular immunotherapy. ...
(Date:9/15/2014)... SAN JOSE, Calif. , Sept. 15, 2014 ... for Proposals (RFP) for flexible, printed product demonstrators ... conducts a two-stage RFP process with pre-proposals due ... in January 2015.  Funds for proposals ultimately selected ... (ARL) and have a significant cost share by ...
Breaking Biology Technology:ITRA Global Reports Downtown Toronto Real Estate Development is in High Gear 2ITRA Global Reports Downtown Toronto Real Estate Development is in High Gear 3Elusive quantum transformations found near absolute zero 2Elusive quantum transformations found near absolute zero 3Cancer Immunotherapy Market: Immune Checkpoint Inhibitors, Cancer Vaccines, and Adoptive T-cell Therapies 2Cancer Immunotherapy Market: Immune Checkpoint Inhibitors, Cancer Vaccines, and Adoptive T-cell Therapies 3Cancer Immunotherapy Market: Immune Checkpoint Inhibitors, Cancer Vaccines, and Adoptive T-cell Therapies 4Cancer Immunotherapy Market: Immune Checkpoint Inhibitors, Cancer Vaccines, and Adoptive T-cell Therapies 5FlexTech Alliance Issues 2015 Request for Proposals in Flexible, Printed Electronics 2
... (OTC Bulletin Board: MNCN), an innovative, global wellness solutions company, ... the OTC Bulletin Board under the symbol "MNCN." The Company,s ... , "The move to the OTC Bulletin Board will ... investors and help improve our trading liquidity," said Patrick Sheridan, ...
... DOR BioPharma, Inc. (OTC Bulletin Board: DORB) ... announced today that it has received a European ... technology for the improved oral delivery of drugs. ... Reverse Micelle Compositions and Uses Thereof" covers lipid ...
... July 8 iZumi Bio, Inc. and Pierian, Inc. ... company, iPierian, Inc. Building on the iZumi infrastructure and ... cellular reprogramming to change the paradigm of drug discovery. ... development of new therapeutics using induced pluripotent stem (iPS) ...
Cached Biology Technology:DOR BioPharma Announces Issuance of European Patent for its LPM(TM) Oral Drug Delivery Technology 2DOR BioPharma Announces Issuance of European Patent for its LPM(TM) Oral Drug Delivery Technology 3DOR BioPharma Announces Issuance of European Patent for its LPM(TM) Oral Drug Delivery Technology 4DOR BioPharma Announces Issuance of European Patent for its LPM(TM) Oral Drug Delivery Technology 5iZumi Bio and Pierian Merge to Form iPierian to Advance Cellular Reprogramming 2iZumi Bio and Pierian Merge to Form iPierian to Advance Cellular Reprogramming 3iZumi Bio and Pierian Merge to Form iPierian to Advance Cellular Reprogramming 4iZumi Bio and Pierian Merge to Form iPierian to Advance Cellular Reprogramming 5iZumi Bio and Pierian Merge to Form iPierian to Advance Cellular Reprogramming 6
All serum is collected from U.S.D.A. fryers and broilers. Pricing: $15/unit for 1 - 10 units; $12/unit for 11 - 50 units...
Whole blood is collected from healthy pigs (mixed breed, either sex) at the time of slaughter, refrigerated within 6 hours, processed within 24 hours and frozen at -20ºC....
Human/Mouse/Rat Keap1 MAb (Clone 333116) Protein Family: Transcription Factor Regulators...
Collected from sexually mature, mixed sex, mixed breed guinea pigs. Pricing: $120/unit for 1 - 10 units...
Biology Products: