Aug 15, 2010 by Melanie Bacou

HarvestChoice relies heavily on large sets of household survey data to evaluate the economic impact of biophysical productivity responses at the farm level and on target populations.

Household Attributes (Credits: http://www.flickr.com/photos/dadakim/1346547512/)

Aug 15, 2010 by Zhe Guo

HarvestChoice uses ESRI ArcGIS Server as a web-based spatial data sharing/exploration platform. This post presents a quick example application using Port Sheds dataset.

ArcGIS Server App Example: Port Sheds

Aug 13, 2010 by Kate Sebastian

Growing seasons define the period of time when temperature and moisture conditions are suitable for crop growth.

growing seasons

Aug 12, 2010 by Jawoo Koo

As a quick demonstration to estimate crop yield levels at regional-scale with various management assumptions, this post describes how crop systems models can be used to assess yield gap of rainfed maize due to the limited supply of soil nitrogen. This methodology can help researchers to find what is the most critical factor that limits crop yield productivity in a given environment condition and how to address the constraint.

Aug 11, 2010 by Jawoo Koo

As an appendix to the Harmonized World Soil Database (HWSD) v1.1, seven soil indicators have been published globally, at 5 arc-minute (10 km) resolution.

Soil

Aug 10, 2010 by Jawoo Koo

By modeling the decomposition of soil organic matter dynamics, crop systems models can simulate the effects of soil nutrient depletion under low-input extractive field management practices, as well as soil carbon sequestration under regenerative management practices.

Maize

Aug 10, 2010 by Jawoo Koo

Many of HarvestChoice’s spatial analyses are done using raster datasets at various spatial resolutions (e.g., 1 km, 10 km, or 50 km grids).

HCADMIN 1.0

Aug 9, 2010 by Zhe Guo

The travel time maps indicate the degree of accessibility from a pixel to a populated place. The patterns shown here describe the geographic accessibility between places in Sub-Saharan Africa. We define accessibility as the time in hours required to travel from a given single point (1x1km pixel) to the nearest market center. Travel time to market centers is used as a proxy for market accessibility and shows the likely extent to which farming households are physically integrated with or isolated from markets.

Market

Aug 8, 2010 by Zhe Guo

Global human settlements database comprises a global dataset of about 55,000 cities and towns with populations of 1,000 or more.

City

Aug 7, 2010 by Jawoo Koo

Through the collaboration with HarvestChoice, a team of scientists at the Universities of Georgia and Florida converted 3,404 soil profiles from the World Soil Information (ISRIC) WISE Global Soil Profile Database v1.1 to the DSSAT-compatible format.

Soil