English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Tools annual

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Presents the access of premium content as premium feature

Premium Content

Global: Zendy Plus annual

Global: Zendy Free Plan

A comparative study on the response of six maize hybrids: two hybrids each   from the 1980s (8321-21 and 8425-8), 1990s (9801-11 and 9803-2) and 2000s   (0103-11 and 0103-15) to sub-optimal and optimal nitrogen fertilization was   conducted in Oke-Oyi, Nigeria. The trials were set up in a split plot with   three nitrogen levels (0, 30 and 90 kg N ha-1) as a main plot and six hybrids   as sub-plots. Significant interactions were observed between hybrid and N   level for all characters, with increasing in variation as the level of N   decreased. Mean grain yield reductions across eras were 73.8% at no-N and   32.6% at low-N, and those of optimal-N fertilization were 34.3% and 15.7% for   1980s and 1990s genotypes respectively. Depending on N treatment, grain yield   varied from 0.67 to 4.89 t ha-1. Kernel number was most severely reduced by N   stress, but had positive and highly significant (p≤0.01) correlation with   grain yield at all N levels. Genetic gains in grain yield were 42% (between   1980 and 2000 eras) and 9% (between 1990 and 2000 eras) under optimal-N   fertilization. The two modern hybrids of 2000 era (0103-11 and 0103-15) were   outstanding for all the agronomic traits and leaf chlorophyll concentration   at all N levels. Improving traits associated with fertilizer N response could   accelerate rate of genetic gains in maize yields

Genetic gains in three breeding eras of maize hybrids under low and optimum nitrogen fertilization