In the context of a recent massive increase in research on plant root functions and their
impact on the environment, root ecologists currently face many important challenges to keep …

Nitrate is an important macronutrient and also acts as a signal for plant growth; however, its
levels in the soil solution can vary by three to four orders of magnitude. Consequently, plants …

Iron (Fe) deficiency and toxicity are the most widely prevalent soil-related micronutrient
disorders in rice (Oryza sativa L.). Progress in rice cultivars with improved tolerance has …

The decade since the publication of the third edition of this volume has been an era of great
progress in biology in general and the plant sciences in particular. This is especially true …

Nitrogen (N) availability plays a key role in terrestrial biosphere dynamics. To understand
and quantify the role of terrestrial N in the Earth system, we developed an advanced …

Physiological studies have established that plants acquire their NO− 3 from the soil through
the combined activities of a set of high-and low-affinity NO− 3 transport systems, with the …

Current global nitrogen fertilizer use has reached approximately one hundred billion kg per
annum. In many agricultural systems, a very substantial portion of this applied nitrogen …

THE high incidence of failure when late-successional conifer species are replanted on
disturbed forest sites is a considerable problem1–3. Here we advance a hypothesis that …

Nitrogen (N) is the most important, essential nutrient for all living organisms on earth; it is
present in a number of complex organic molecules and plays extremely important roles in …

There is a growing recognition that accurate predictions of plant and ecosystem responses
to global change require a better understanding of the mechanisms that control acquisition …