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

تعداد نتایج: 7769488  

2000
Jon C. Gottschalck Robert R. Gillies Toby N. Carlson

Increasing levels of atmospheric CO2 concentration [CO2] has caused a debate in the scientific community over how vegetation responds to this increase — specifically in the stomatal resistance increase (SRincrease) and the transpiration decrease (TRdecrease). This paper presents results in changes of stomatal resistance and transpiration from two canopy model simulations under varying environme...

A. Eskandarlo, H. Gholam-hosseinian, K. Ghazi-khanlou Sani, M. Mohammadi,

Background: In conventional radiation therapy, regarding normal tissue tolerance, the treatment of bulk tumors is one of the remaining challenges. Grid Radiation Therapy (GRT) is a technique to deliver high doses, approximately 15 – 20 Gy per fraction, to several small volumes located in a large radiation field. This can be performed using a grid block. The current work has concentrate...

2017
Allen L. Thompson Derrel L. Martin John M. Norman Judy A. Tolk James R. Gilley Arlan D. Schneider

Field water balance measurements using monolithic lysimeters were used in validating the Cupid-DPE model for predicting water loss partitioning during sprinkler irrigation from a moving lateral system fitted with impact sprinklers and spray nozzles. The model combines equations governing water droplet evaporation and droplet ballistics with a comprehensive plant-environment energy balance model...

Journal: :medical journal of islamic republic of iran 0
alimohamad asghari ent research center, rasoulakram hospital, iran university of medical sciences, tehran, iran. iran.سازمان اصلی تایید شده: دانشگاه علوم پزشکی ایران (iran university of medical sciences)سازمان های دیگر: ent research center rasoulakram hospital, shahin rajaeih rasoulakram hospital, iranuniversity of medical sciences, tehran, iran.سازمان اصلی تایید شده: دانشگاه علوم پزشکی ایران (iran university of medical sciences)سازمان های دیگر: rasoulakram hospita fatemeh hassannia rasoulakram hospital, iranuniversity of medical sciences, tehran, iran.سازمان اصلی تایید شده: دانشگاه علوم پزشکی ایران (iran university of medical sciences)سازمان های دیگر: rasoulakram hospita negah tavakolifard iran university of medical sciences, tehran, iran.سازمان اصلی تایید شده: دانشگاه علوم پزشکی ایران (iran university of medical sciences) hamed fattahi neisyani

background :soft tissue profile can be widely different in various populations. furthermore, this profile can be also continues to change throughout life. however, there are few studies that quantitatively evaluate the soft tissue profile in iranian population. in order to determine normal reference values of facial parts in our populations, we aimed to measure standards for facial soft tissue ...

پایان نامه :دانشگاه بین المللی امام خمینی (ره) - قزوین - دانشکده مهندسی معماری و شهرسازی 1388

nowadays,tourism industry considered as one of the main sources of income of a country.unfortunately and despite of owning plenty of cultural historical and natural attractions, iran has not reached to a proper position in this field. besides, the historical cities of a country are considered as the income resource and national wealth of it. qazvin with a rich cultural precedent, have suitable ...

2010
Juliana S. Medeiros William T. Pockman

Juvenile woody desert perennials often exhibit higher rates of transpiration than co-occurring adults, which may facilitate establishment by increasing carbon gain when water is plentiful, but increase the risk of hydraulic failure during drought. We tested three hypotheses regarding the role of hydraulic limits in two size classes of Larrea tridentata: 1) small plants grow faster and use more ...

2003
GUILLAUME SIMIONI

The spatially explicit and mechanistic model TREEGRASS was used to test the effects of tree density, tree spatial distribution, and tree size distribution on radiation absorption, net primary production (NPP), and, water fluxes for a West African savanna . The model has previously been shown to adequately predict radiation absorption, production, and soil water balance in humid savannas . Using...

2012
Jorge Antonio Sánchez-Molina Francisco Rodríguez José Luis Guzmán Manuel R. Arahal

Monitoring the greenhouse transpiration for control purposes is currently a difficult task. The absence of affordable sensors that provide continuous transpiration measurements motivates the use of estimators. In the case of tomato crops, the availability of estimators allows the design of automatic fertirrigation (irrigation + fertilization) schemes in greenhouses, minimizing the dispensed wat...

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