Leaf and must nitrogen content two complementary indicators of grapevine nitrogen status

Optimal Leaf-to-Root Ratio and Leaf Nitrogen Content Determined by Light and Nitrogen Availabilities

Plants exhibit higher leaf-to-root ratios (L/R) and lower leaf nitrogen content (N(area)) in low-light than in high-light environments, but an ecological significance of this trait has not been explained from a whole-plant perspective. This study aimed to theoretically and experimentally demonstrate whether these observed L/R and N(area) are explained as optimal biomass allocation that maximize...

Depth of nitrogen fertiliser placement affects nitrogen accumulation, translocation and nitrate-nitrogen content in soil of rainfed wheat

A field experiment was conducted to examine the effects of different depths ofnitrogen (N) fertiliser placements on N accumulation, remobilisation and NO3−-Ncontent in soil of rainfed wheat. Nitrogen was applied on the surface (D1) and inthe 10 cm (D2), 20 cm (D3) and 30 cm (D4) soil layers from 2010 to 2012.Compared with D1 and D2, D3 and D4 treatments obtained significant higher Ndistribution...

Growth and nitrogen content of sunflower as affected by the rate and form of nitrogen

Complementary functioning of two components from nitrogen-fixing bacteria.

Use of alternate substrates (acetylene, azide, cyanide) for estimating N(2) fixation confirmed that recombined fractions from different bacteria are functional but restricted in complementarity.

Leaf Photosynthetic Capacity, Chlorophyll Content, and Specific Leaf Nitrogen Relationships in Sunflower Crops Prior to Anthesis