Potential limitations for potato yields in raised soil field systems near Lake Titicaca

Raised Field Agriculture in the Lake Titicaca Basin: Putting Ancient Agriculture Back to Work

Symbolic landforms created by ancient earthworks near Lake Titicaca

Interesting landforms created by an ancient network of earthworks are shown, using Google satellite imagery enhanced by an image processing. This network covers a large part of the land near the Titicaca Lake. Satellite images clearly display the slopes of hills criss-crossed with terrace walls and the surfaces of the plains covered with raised fields, indicating that this was once a highly pro...

The Lake Titicaca Basin: A Pre-Columbian Built Landscape

Field Techniques: Soil Systems

This article deals with the principles of soil formation and shows the problems to recognize and visualize the many effects of man made stress in soils. Soils are transformation products of minerals and organic matter with a defined organization, morphology and structure. They are closely related to site factors and for this, the soil properties vary considerably in time and space. Due to many ...

Does Participation in Farmer Field School Extension Program Improve Crop Yields? Evidence from Smallholder Tea Production Systems in Kenya

Agricultural Extension services are among the most important rural services in developing countries. The services are considered to be a key driver of technological change and productivity growth in agriculture. In Kenya, like in the rest of the developing economies, agricultural extension has largely been delivered through supply–driven approaches. Due to perceived low impact of agricultural e...