Accurate yield estimation is of utmost importance for the entire grape and wine production chain, yet it remains an extremely challenging process due to high spatial temporal variability in vineyards. Recent research has focused on using image analysis vineyard estimation, with one major obstacles being degree occlusion bunches by leaves. This work uses canopy features obtained from 2D images (...

[i] Nitrate (NO^~) leakage from forested watersheds due to disturbance is a well documented but not well understood process that can contribute to the degradation of receiving waters through eutrophication. Several studies have shown that large-scale defoliation and deforestation events in small forested watersheds in the eastern United States cause immediate and dramatic increases in NO^ flux ...

Tolerance to defoliation can be defined as the degree to which productivity is affected by photosynthetic area reduction. This trait was studied in grain amaranth (Amaranthus cruentus and A. hypochondriacus), which are considered to be a highly defoliation-tolerant species. The physiological and biochemical responses to increasing levels of mechanical leaf removal up to total defoliation were q...

This experiment was conducted to determine the effect of defoliation time on productivity maize, forage and in vitro digestibility maize leaves (ML). The response grain yield, plant height, days 50% silking, ear height leaf yield as well chemical composition ML variety "Obasuper" were evaluated a randomized complete block design with four treatments 3, 6, 9 weeks after planting (WAP) undefoliat...

High nutrient availability and defoliation generally reduce ectomycorrhizal colonization levels in trees, but it is not known how this affects the functional aspects of mycorrhizal symbiosis. It was therefore investigated whether (1) defoliation or increasing substrate N availability reduce C allocation from the plant to the fungus and N allocation from the fungus to the plant (symbiotic resour...

To understand the responses to external disturbance such as defoliation and possible feedback mechanisms at global change in terrestrial ecosystems, it is necessary to examine the extent and nature of effects on aboveground-belowground interactions. We studied a temperate heathland system subjected to experimental climate and atmospheric factors based on prognoses for year 2075 and further expo...

The removal of the top stem bud independently or in combination with the leaves, known as decapitation, can lead to changes in the physiological state of plants at the same age. The decapitation procedure reverses the symptoms of senescence which makes it an effective physiological approach to study the control mechanisms of delayed leaf senescence and rejuvenation. The process of rejuvenation ...

This study evaluated the leaf area index (LAI) recovery mechanisms and forage accumulation rates on regrowth of different grass species subjected to defoliation intensities. For that purpose, plots Pennisetum clandestinum (kikuyugrass), Lolium multiflorum (annual ryegrass), Avena strigosa (black oats) were defoliated from 20 80 % their initial heights (25, 20, 25 cm, respectively). At increment...