نتایج جستجو برای: spring frost

تعداد نتایج: 56164  

Journal: :Tree physiology 2013
Manuel Pramsohler Gilbert Neuner

In deciduous trees, measurement of stem water potential can be difficult during the leafless period in winter. By using thermocouple psychrometry, osmotic water potentials (Ψo; actual Ψo: Ψo(act); Ψo at full saturation: Ψo(sat)) of expressed sap of bark and bud tissue were measured in order to test if the severity of winter desiccation in apple stems could be sufficiently assessed with Ψo. Wate...

2016
Ahmed Sallam Mustapha Arbaoui Mohamed El-Esawi Nathan Abshire Regina Martsch

Frost stress is one of the abiotic stresses that causes a significant reduction in winter faba bean yield in Europe. The main objective of this work is to genetically improve frost tolerance in winter faba bean by identifying and validating QTL associated with frost tolerance to be used in marker-assisted selection (MAS). Two different genetic backgrounds were used: a biparental population (BPP...

Journal: Desert 2008
E. Fattahi K. Noohi

Frost is one of the atmospheric phenomena which seriously threaten crop production. It also causes numerousaccidents in mountainous roads. In this research the Spatial Synoptic Classification SSC method was employed toclassify the type of air masses. For the classification, such meteorological data as: temperature, dew point, mean sealevel pressure, cloudiness, direction and speed of wind were ...

Journal: :Molecules 2018
Xin Li Ji-Peng Wei Eric R Scott Jian-Wei Liu Shuai Guo Yang Li Lan Zhang Wen-Yan Han

The unprecedented early spring frost that appears as a cold stress adversely affects growth and productivity in tea (Camellia sinensis L.); therefore, it is indispensable to develop approaches to improve the cold tolerance of tea. Here, we investigated the effect of pretreatment with exogenous melatonin on the net photosynthetic rate, the maximum photochemical efficiency of PSII, chlorophyll co...

Journal: :Monthly Weather Review 1911

Journal: :Journal of Advanced Concrete Technology 2021

Concrete structures serving in cold and wet regions usually suffer frost damage thus have server deterioration. Many researches been conducted to reveal the damaging mechanism damaged mechanical properties of concrete under effect action. It has widely known that strength stiffness without using air-entraining agent decrease room temperature. However, there will be a different story if frost-da...

Journal: :Agriculture 2022

Leguminous service crops (SCs) can provide multiple services to cropping systems, reducing the reliance on external resources if sufficient biomass is produced. However, rapid light and temperature reductions limit post-harvest cultivation of SCs in Northern Europe. A novel practice intercropping two consecutive (spring–winter cereal) extend period growth, hence improve yield reduce weeds, was ...

Journal: :Atmosphere 2021

Spring frosts damage crops that have weakened freezing resistance after germination. We developed a machine learning (ML)-based frost-classification model and optimized it for orchard farming environments. First, logistic regression, decision tree, random forest, support vector models were trained using balanced Korea Meteorological Administration (KMA) Automated Synoptic Observing System (ASOS...

2015
Guillaume Wos Yvonne Willi Zhulong Chan

The study of latitudinal gradients can yield important insights into adaptation to temperature stress. Two strategies are available: resistance by limiting damage, or tolerance by reducing the fitness consequences of damage. Here we studied latitudinal variation in resistance and tolerance to frost and heat and tested the prediction of a trade-off between the two strategies and their costliness...

2011
Alan W. REMPEL

The deformation of the ground surface that is produced by frost heave has motivated almost a century of concerted laboratory, field and theoretical studies. Well before the development of equipment capable of resolving the microscopic films that support liquid transport towards growing ice lenses, early investigators predicted their occurrence and noted their importance. Idealized experiments c...

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