Atlas Of Weed Mapping Krahmer Hansjorg by Krahmer, Hansjorg 9781118720714, 9781118720721, 9781118720738, 1118720717, 1118720725, 1118720733 instant download after payment.

Weeds are plants interfering with man’s interest (Krähmer and Baur,
2013). On arable fields, they compete with crops and reduce yields,
some of them are toxic, some cause problems for harvesting, others have a negative impact on crop quality. Weed control is therefore a considerable economic factor in modern agriculture. Almost
$US17 billion were spent in 2010 on herbicides worldwide (Markets
and Markets, Dallas, Sept. 26, 2011; Wallstreet Online). At the same
time, weeds are indicators of ecological changes and of changes in
farming practices. Global trade is leading to a worldwide distribution of species which adapt to a wide range of environmental conditions. The Atlas of Weed Mapping provides an overview of the most
common weeds affecting the major crops in the world.

The approach to our objective is new insofar as we do not rely
on species distribution ranges in the first instance. To make it clear
from the beginning, we will not be able to achieve anything that is
comparable or comes even close to some of the outstanding maps
produced by several teams of ecologists in the last century, for
example, by Meusel et al. (1965, 1978; Meusel & Jäger 1992) . We
have a different aim as we do not want to produce new distribution
maps. We want to rank weeds according to frequency and we want
to show where the most frequent weeds occur in major crops.