Our meta-analyses indicate that, for the examined functional groups of non-target invertebrates, laboratory studies have, on average, been accurate or conservative in predicting effects of Bt crops on field abundance of trophic guilds.
More dire, the state's crop of field corn -- not served on the table, but used to make starch, corn oil and dog food, among other products -- may fall by as much as 30percentthis yearar.
While Western governments have long worried that its self-declared leaders, many of whom operate from Turkey, cannot jell into a coherent movement with unifying leaders, the fighting across the country has been producing a crop of field commanders who stand to assume just these roles.
We conclude that agri-environmental schemes should place more emphasis on facilitating the value of the cropped area of fields as a foraging and nesting habitat.
Non-crop vegetation of field margins provides resources for natural enemies of crop herbivores.
But, although I use photographs in the studio, I don't think it's appropriate to look at the work in ways derived from our experience of photography – cropping, depth of field, focus etc.
One idea is to plant a small area of traditional crops near fields of genetically modified ones.
With an enormous variety of crops, fields and farmers, there will be a variety of different practices used (including the investigation of wild-type relatives of staple crops), and we will need this variety in the coming decades.
Because of the large size of crop fields in Iowa, all homes with crops within 100 m and 101 250 m also had crop acreage at farther distances.
Across Madagascar, flooding wrecked over 300000 ha of crop fields, affecting 70% of the rice crop, and killed more than 13,000 cattle.
