نتایج جستجو برای: msavi2

تعداد نتایج: 40  

Journal: :Geocarto International 2023

Hailstorms have increased in frequency and intensity over the past decade causing substantial losses agriculture. Since hailstorms often hit a wide area with no detectable pattern, relying on traditional field-based methods to assess crop damage is difficult. The aim of this study was develop test new four-stage normalized vegetation index approach for detecting severity hailstorm sugarcane pla...

Journal: :Journal of Central European Agriculture 2022

The present study aimed to analyze and evaluate the barley crops, also estimate production by analyzing satellite images. was conducted at Didactic Experimental Resort (DER) of BUASVM Timisoara, Timis County, Romania. PlanetScope platform used for study, with a spatial resolution 3 m. images were taken in Remote Sensing System, 7 different moments, between 27 March June 2020. Based on spectral ...

Mahnoosh Pourhadi Mohammad Mahdavi, Saeed Mohtashamnia,

Ecotones are zones of gradual changes from an ecological system to another.Ecotones monitoring could be important to find out the reason for changes and limits. Inthis research satellite data were used to analyze the ecotone boundary in Fars steppicrangelands using IRS LISS III and Pan data of year 2006. The real vegetation map andecotones prepared through Geo-eye images from Google earth softw...

Journal: :journal of rangeland science 2013
mahnoosh pourhadi saeed mohtashamnia mohammad mahdavi

ecotones are zones of gradual changes from an ecological system to another.ecotones monitoring could be important to find out the reason for changes and limits. inthis research satellite data were used to analyze the ecotone boundary in fars steppicrangelands using irs liss iii and pan data of year 2006. the real vegetation map andecotones prepared through geo-eye images from google earth softw...

Journal: :Agronomy 2023

The maximum quantum efficiency of photosystem II (Fv/Fm) is a widely used indicator photosynthetic health in plants. Remote sensing Fv/Fm using MS (multispectral) and RGB imagery has the potential to enable high-throughput screening plant agricultural ecological applications. This study aimed estimate spring wheat at an experimental base Hanghou County, Inner Mongolia, from 2020 2021. images we...

Journal: :Remote Sensing 2016
Pablito M. López-Serrano José J. Corral-Rivas Ramón A. Díaz-Varela Juan G. Álvarez-González Carlos A. López-Sánchez

Solar radiation is affected by absorption and emission phenomena during its downward trajectory from the Sun to the Earth’s surface and during the upward trajectory detected by satellite sensors. This leads to distortion of the ground radiometric properties (reflectance) recorded by satellite images, used in this study to estimate aboveground forest biomass (AGB). Atmospherically-corrected remo...

ژورنال: :علوم آب و خاک 0
ندا زاهدی فرد n. zahedifard سیدجمال الدین خواجه الدین s. j. khajeddin احمد جلالیان a. jalalian

در حال حاضر با پیشرفت فن آوری، استفاده از داده های ماهواره ای به علت برداشت پوشش تکراری، یکپارچه بودن اطلاعات، تهیه اطلاعات در قسمت های مختلف طیف الکترومغناطیس و امکان به کارگیری سخت افزارها و نرم افزارها در دنیا با استقبال خاصی روبه رو شده است. هدف پژوهش حاضر عبارت است از: بررسی قابلیت داده های سنجنده tm، ماهواره لندست برای تهیه نقشه کاربری اراضی حوضه آبخیز بازفت (استان چهارمحال بختیاری). برای...

Journal: :مهندسی بیوسیستم ایران 0
نیکروز باقری دکتری، دانشگاه تهران حجت احمدی دانشیار، دانشگاه تهران محمود امید استاد، دانشگاه تهران سیدکاظم علوی پناه استاد، دانشگاه تهران

the present research was carried out with the aim of site-specific nitrogen fertilizer management, through aster imagery. a 23 ha corn field in pakdasht town in southern tehran province constituted the research area. plant sampling was carried out simultaneous with the passing by of the satellite sensor over, throughout the farm. a total of 53 pixels were selected through systematic randomized ...

Journal: :Agronomy 2021

Meeting food demand for the growing population will require an increase to crop production despite climate changes and, more particularly, severe drought episodes. Sorghum is one of cereals most adapted that feed millions people around world. Valorizing its genetic diversity improvement can benefit from extensive phenotyping. The current methods evaluate plant biomass, leaves area and plants he...

حجت احمدی سیدکاظم علوی‌پناه محمود امید, نیکروز باقری,

پژوهش حاضر به منظور تهیه نقشه تغییرات نیتروژن با استفاده از تصویرماهواره ای ASTER انجام شد. منطقه مورد مطالعه، یک مزرعه ذرت 23 هکتاری در شهرستان پاکدشت در جنوب استان تهران انتخاب شد. عملیات نمونه برداری همزمان با عبور ماهواره از منطقه صورت گرفت. تعداد53 نمونه با استفاده از روش نمونه برداری تصادفی منظم انتخاب شدند. درصد نیتروژن نمونه ها، با استفاده از روش کجدال به دست آمد. خطای تصحیح هندسی تصوی...

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