Nitrogen (N) is significantly related to crop photosynthetic capacity. Over-and-under-
application of N fertilizers not only limits crop productivity but also leads to negative …

This paper reviews the most important biological processes that determine the yield of winter
oilseed rape (Brassica napus L.). Biological yield is the product of growth rate and duration …

This new edition provides current information on the nutritional requirements of world crops.
It presents research on the acquisition, accumulation, transport, and functions of chemical …

The rate of N uptake of crops is highly variable during crop development and between years
and sites. However, under ample soil N availability, crop N accumulation is highly related to …

The environmental constraints to agriculture imply that nitrogen (N) fertilizer management
should be adjusted to crop N requirements determined by target yields. Nowadays for …

Mineral nitrogen fertilization has improved crop yield over the last century but has also
caused air and water pollution. Reduction of nitrogen inputs and maintaining high yields are …

Winter oilseed rape (Brassica napus L.) is the dominant oilseed crop in northern Europe.
Generally, it requires high amounts of nitrogen (N) but is characterized by low N-efficiency …

The concept of critical nitrogen concentration (% N c) has been proposed as the minimum%
N in shoots required to produce the maximum aerial biomassat a given time. Several …

Data from a field experiment (1995–2000) conducted on a fertile sandy loess in the
Hercynian dry region of central Germany were used to determine the productivity of winter …

Among the environmental factors that can be modified by farmers, water and nitrogen are
the main ones controlling plant growth. Irrigation and fertilizer application overcome this …