نتایج جستجو برای: transpiration can be determined precisely using field measurements however

تعداد نتایج: 7769488  

Journal: :Agricultural Water Management 2022

Tillage practices are known to affect soil water retention, plant available and, consequently, crop production. Impacts can be determined by assessing hydraulic properties and characteristics. In this study, three tillage were investigated with respect vertical distribution development of soybean. A specific focus was set on determining evaporation transpiration as fractions evapotranspiration ...

Journal: :Bio Systems 2014
Dolores Marín Mercedes Martín Patricia H. Serrot Bartolomé Sabater

Experimental and theoretical flux models have been developed to reveal the influence of sun flecks and increasing CO2 concentrations on the energy and entropy balances of the leaf. The rapid and wide range of fluctuations in light intensity under field conditions were simulated in a climatic gas exchange chamber and we determined the energy and entropy balance of the leaf based on radiation and...

2009
Todd M. Scanlon William P. Kustas

Partitioning of eddy covariance flux measurements is routinely done to quantify the contributions of separate processes to the overall fluxes. Measurements of carbon dioxide fluxes represent the difference between gross ecosystem photosynthesis and total respiration, while measurements of water vapor fluxes represent the sum of transpiration and direct evaporation. Existing flux partitioning pr...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه محقق اردبیلی - دانشکده علوم کشاورزی 1391

abstract: the potato tuberworm, phthorimaea operculella (zeller), is an important insect pest of potato (solanum tuberosum l.) in the storage and field in most parts of the world especially in tropical and subtropical regions due to its close relationship with the host, high reproductive potential and high economic losses. information on host preference, life table parameters and digestive en...

2014
Thibault Nordey Mathieu Léchaudel Marc Saudreau Jacques Joas Michel Génard

Fruit physiology is strongly affected by both fruit temperature and water losses through transpiration. Fruit temperature and its transpiration vary with environmental factors and fruit characteristics. In line with previous studies, measurements of physical and thermal fruit properties were found to significantly vary between fruit tissues and maturity stages. To study the impact of these vari...

2005
M. S. Sheshshayee H. Bindumadhava R. Ramesh T. G. Prasad M. R. Lakshminarayana M. Udayakumar

Experimental evidence is presented to show that the O enrichment in the leaf biomass and the mean (timeaveraged) transpiration rate are positively correlated in groundnut and rice genotypes. The relationship between oxygen isotope enrichment and stomatal conductance (gs) was determined by altering gs through ABA and subsequently using contrasting genotypes of cowpea and groundnut. The Peclet mo...

2005
Yao-Li Chuang Ram Oren Andrea L. Bertozzi Nathan Phillips Gabriel G. Katul

1 Linking sap flow in tree boles to plant transpiration continues to be a fundamental and 2 practical research problem in physiological ecology and forest hydrology. Many models have 3 been proposed to describe water movement within trees with varying degrees of success. The 4 prevailing resistance-capacitance (RC) circuit models have the advantage of being easy to 5 implement. However, RC mode...

2006
Jianwu Tang Paul V. Bolstad Brent E. Ewers Ankur R. Desai Kenneth J. Davis Eileen V. Carey

[1] Combining sap flux and eddy covariance measurements provides a means to study plant stomatal conductance and the relationship between transpiration and photosynthesis. We measured sap flux using Granier-type sensors in a northern hardwood-dominated old growth forest in Michigan, upscaled to canopy transpiration, and calculated canopy conductance. We also measured carbon and water fluxes wit...

Journal: :journal of artificial intelligence in electrical engineering 2014
shahin shafei

this paper mainly focused on implementation of aes encryption and decryption standard aes-128. all the transformations of both encryption and decryption are simulated using an iterativedesign approach in order to minimize the hardware consumption. this method can make it avery low-complex architecture, especially in saving the hardware resource in implementing theaes inversesub bytes module and...

Journal: :journal of medical signals and sensors 0
maryam atarod parvaneh shokrani

background: because of the adverse effects of ionizing radiation on fetuses, prior to radiotherapy of pregnant patients, fetal dose should be estimated. fetal dose has been studied by several authors in different depths in phantoms with various abdomen thicknesses (at). in this study, the effect of maternal at and depth in fetal dosimetry was investigated, using peripheral dose (pd) distributio...

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