The aim was to study the genetic control of agronomic efficiency at low N availability in maize. Experiments were conducted seven environments a square lattice design with 49 hybrids, consisting 48 crosses and one commercial hybrid, evaluated without application top dressing. Grain yields (GYHN) (GYLN) nitrogen dressing assessed, these traits used calculate (AELN) harmonic mean relative perform...

Abstract The uptake of carbon dioxide (CO 2 ) from the atmosphere through photosynthesis is accompanied by an inevitable loss water vapor stomata leaves. rate leaf-level CO assimilation per unit stomatal conductance, i.e. intrinsic water-use efficiency (WUE i ), thus a key characteristic terrestrial ecosystem functioning that central to global hydroclimate system. Empirical evidence and theory ...

in the present experiment, the effects of nitrogen and phosphor fertilizer application in two methods of furrow and trickle irrigation on the yield and quality of sugar beet seed cultivar 7233 were studied. the experiment was conducted as a split factorial in a completely randomized block design with three replications during 2003 and 2004 in hamedan province. main plots were allocated to irrig...

in order to evaluate the effects of nitrogen levels and its split application on growth indices and their relationship with grain yield of rice (cv. khazar), a field experiment was conducted at rice research institute of iran with 11 treatments arranged in a randomized complete block design with 3 replications in 2008. nitrogen fertilizer levels (10, 20 and 30 kg.ha-1) were applied according to...

Functional traits can drive plant responses to short- and long-term stressful conditions, with potential effects on species persistence in local habitats, changes in population size and structure, and potential species range shifts in changing environments. We investigated whether ecophysiological traits in a rare cycad vary along environmental gradients and with ontogeny to understand intra-sp...