Recent research on ways in which N application to swards influences the growth and composition of grasses is reviewed, with particular emphasis on factors of concern to sward management. It is concluded that N application has considerable effects on tiller number and size, factors that can be...

The N nutrition of non-leguminous crop plants is reviewed broadly with the particular aim of highlighting the variable nature of the understanding of different aspects of the subject. Part 1 of the review considers N uptake, including movement to and uptake by roots, influx/efflux processes,...

In Part 2 of this broad review amined at highlighting the uneven understanding of different aspects of the N nutrition of crop plants, aspects considered are the effects of environment, including temp., light, water and salt stress, CO₂ enrichment and mineral nutrition on N uptake and distribution, ...