Skip all navigation and jump to content Jump to site navigation Jump to section navigation
NASA Home Page Goddard Space Flight Center Home Page
NASA Logo - Goddard Space Flight Center    + Visit NASA.gov
a directory of Earth science data and servicesGlobal Change Master Directory Web site
header 2 bullet Links bullet FAQ bullet Contact Us bullet Site Map
Home Data Sets Data Services Portals Add new dataset or dataservice records to GCMD What's New Participate CEOS IDN About GCMD
bullet Data Analysis And Visualization
bullet Data Management/Data Handling
bullet Education/Outreach
bullet Environmental Advisories
bullet Hazards Management
bullet Metadata Handling
bullet Models
bullet Reference And Information Services
bullet Web Services
bullet Display Feature Guide
bullet Earth Science Links
bullet Portal Collaborations
bullet Questions?
Record Search Query:

The Online Potassium Fertilizer Crop Response Model
 Entry ID: Potassium_Model-00

[ Update this Record ]

Summary
Abstract: The model calculates the effects of incorporating potassium fertilizer on the
yield and potassium uptake of 13 different vegetable and arable crops. It also
calculates the changes in both exchangeable and fixed soil-potassium and in the
activity ratio of potassium in soil solution. The model updates the variables
for each day during growth but only the values at harvest are shown in the
results.

... View entire text
Related URL
Link: VIEW RELATED INFORMATION
Description: Horticulture Research International (HRI) is the leading horticultural research
and development centre in the UK. Its research activities form a fully
integrated programme across the major scientific disciplines. They include
basic and strategic scientific studies on plant processes leading to practical
studies whose results can be taken up directly by industry. This progression
from research project to end-user is a vital link on which HRI lays great
importance and this particular Internet application is a good example of such
technology transfer.

A range of information systems and predictive models is available from
Horticulture Research International for commercial use.
Service Citation
Title: Potassium Crop Response Model
Provider: QPAIS
URL: http://www.qpais.co.uk/moda-djg/potass.htm
Service Keywords
MODELS >COMPONENT PROCESS MODELS Parameter Definition
Science Keywords
AGRICULTURE >AGRICULTURAL CHEMICALS >FERTILIZERS Parameter Definition
AGRICULTURE >SOILS >POTASSIUM Parameter Definition
AGRICULTURE >AGRICULTURAL PLANT SCIENCE >CROP/PLANT YIELDS Parameter Definition
AGRICULTURE >FOOD SCIENCE >FOOD QUALITY Parameter Definition
ISO Topic Category
FARMING
ECONOMY
GEOSCIENTIFIC INFORMATION
ENVIRONMENT
Quality This Web version of the model is a simplification of a more sophisticated one.
The simplifications include calculating the important relationships between K
activity ratio and exchangeable soil-K from the clay content and assuming a
constant soil water content instead of calculating it for each day from from
daily inputs of weather. Nevertheless existing evidence suggests that this Web
version can work well.
Use Constraints DISCLAIMER. The authors of this program and the associated World Wide Web
pages do not accept any responsibility for the purposes to which information
from the program and the pages may be put by other people. Therefore, if the
crop response to potassium fertilizer is more important to you than mere casual
interest, you should supplement the results presented here by consulting your
local agricultural or horticultural advisory services.
Ancillary Keywords
Horticulture
Nitrogen
Phosphate
Service Provider
QPAIS > Qualifying Professional Association, Institutions and Societies Supplemental Info
Service Organization URL: http://www.qpais.co.uk/

Service Provider Personnel
Name: DUNCAN GREENWOOD
Email: duncan.greenwood at hri.ac.uk
Contact Address:
Horticulture Research International
Wellesbourne
City: Warwickshire
Postal Code: CV35 9EF
Country: UK
Distribution Media
Distribution_Media: Electronic
Distribution_Format: HTML
Personnel
TYLER B. STEVENS
Role: SERF AUTHOR
Phone: (301) 614-6898
Fax: 301-614-5268
Email: Tyler.B.Stevens at nasa.gov
Contact Address:
NASA Goddard Space Flight Center
Global Change Master Directory
City: Greenbelt
Province or State: MD
Postal Code: 20771
Country: USA
Publications/References
Greenwood D.J. & Karpinets T.V. 1997 Dynamic model for the effects of K
fertilizer on crop growth, K-uptake and soil-K in arable cropping. 1.
Description of the model. Soil Use and Management 13: 178-183.
View entire list
Creation and Review Dates
SERF Creation Date: 2000-08-21
SERF Last Revision Date: 2006-04-27
  View Text Only Format
USA dot gov - The U.S. Government's Official Web Portal
+ Privacy Policy and Important Notices
NASA
Webmaster:  Monica Holland
Responsible NASA Official:  Lola Olsen
Last Updated: January 2012