One of the key challenges for AfSIS is how to measure soil functional properties on tens of thousands of georeferenced soil samples. Spectral diagnostics – the use of low cost, high throughput analytical techniques based on light reflectance – solves this problem. Infrared and x-ray spectroscopic analytical techniques that required minimal sample preparation are used as a front line screening tool. More expensive and time-consuming measurements of soil functional properties are then calibrated to the spectral measurements on a subset of samples.

Feb. 2009 -- Shamie Zingore and Jeroen Huising

1. Sentinel Site: Nogossire village, Kayes Region

Climate

The site is located in the semi-arid northern edge of the Sudan climatic zone. Annual rainfall averages about 600 mm/yr and falls in a unimodal pattern (June-August). 

April 13th -16th, 2009 -- Shamie Zingore and Jeroen Huising

1. Limpasi Irrigation Scheme, Nkatha Bay District

Location and Climate

The climate in Malawi is largely influenced by Lake Malawi, which covers almost two-thirds of Malawi’s eastern border.  Nkhata Bay District is located in northern Malawi and lies on the shore of Lake Malawi. The area experiences humid savanna climate with annual rainfall averaging 1700 mm. Rainfall distribution is unimodal (October-May).