There are many other examples.The knowledge and experience of the remaining indigenous people in the tropics can contribute decisively to increasing food production in the tropics—and in ways that will not destroy the croplands within a generation or two.ANTON HAUGEOsloSIR Mr Sachs provides a vivid interpretation of how structural difficulties handicap tropical countries.
We analyzed their relative abundance and habitat use at two spatial scales: (1) Local, where three different successional stages of tropical deciduous forest were compared, and (2) Landscape, where available habitats were compared in terms of landscape composition (proportion of forests, pastures and croplands within 113 ha).
Currently, CRP enrollment on over 25,000 ha of playas has returned 0.2 Tg C (95% CI: 0.1 0.3), only half the historic SOC lost by cropland conversion within CRP playas.
Both indices were tested in three woodland habitats: a mature forest, a young forest and a forest-cropland ecotone within the Parc Naturel Régional of Haute-Vallée de Chevreuse (France).
The location and extent of cropland and grassland within a reporting unit is derived from remote sensing data [22].
Given current population trends and projections in sub-Saharan Africa, it is anticipated that substantial intensification of agricultural cropland is certain within the next decades.
Fragmentation indices at the class level (wetland, forest with bushland, grassland and cropland) were measured within the collared serval's minimum convex polygon area (MCP) of home range.
Playas without grass buffers within cropland watersheds on average accumulated 8.5 cm of recent sediment and lost 30% volume of storage capacity, while those with grass buffers in mixed cropland watersheds accumulated an average of 1.8 cm of recent sediment and lost 7% volume.
To determine the compatibility of biological control and insect-resistant and herbicide-tolerant GM crop traits within integrated pest-management programs, this synthesis prioritizes understanding the bi-trophic and prey/host-mediated ecological pathways through which natural enemies interact within cropland communities, and how GM crops alter the agroecosystems in which natural enemies live.
