This obviously low P use efficiency is unsustainable.

Root architecture, however, has been overlooked in intercropping studies despite the recognition that root placement may be more important for competition than root physiology (Schwinning and Weiner, 1998).

Leaves have sustained virtually all terrestrial ecosystems over the last 400 million years

Live- stock may be given access to the largest of these two mesas in the near future. Attempts had previously been made to construct a stock trail to its top; these efforts were being renewed in 1956

Knowing that other animals are as smart as us means we can appreciate them more, which could also help us to help them.

An outstanding feature of Theodore Roosevelt National Park (THRO) is the exceptionally old and undisturbed gallery forest of plains cottonwood (Populus deltoidessubsp. monilifera) along the Little Missouri River. THRO protects the oldest known plains cottonwoods in the world, established as early as the year 1641 and growing up to 1.66 m (5.45 ft) in diameter. As the largest and most abundant tree in theriparian ecosystem, cottonwoods provide important habitat for many other species (Brinson et al. 1981).

However, intraspecific patterns also provide useful information

Given the wide application of this proxy, calledleaf-margin analysis, it is surprising that the selective mecha-nisms driving the response of leaf margins to temperature areonly poorly known

How does bearberry cope with this wide range of environmental conditions, coupled with high levels of solar radiation?

In view of thesubstantial morbidity and even death5 associated withprolonged parenteral antibiotic treatment of Lyme dis-ease

The above results forced us to entertain two alternativemodels (Fig. 1) that could not be distinguished in the previousstudy. One model proposes that the gametophyte produces asignal that directly, or indirectly through its effects on sporo-phytic cells, causes pollen tube guidance to the ovule (Fig. 1A).

To investigate the nature and role of cell adhesion in plants,we analyzed the initial step of pollination in Arabidopsis: thebinding of pollen grains to female stigma cells.

But be that as it may, any complete statement about motives will offer some kind of

ourmotives

so that things done by man not be forgotten in time, and that great and marvelous deeds, some displayed by the Hellenes, some by the barbarians, not lose their glory

Since a given action can be done from many motives, the former must try to disparage it by selecting the worse motive of two, the latter to put the better construction on it.