نتایج جستجو برای: growth degree days gdd

تعداد نتایج: 1402068  

2012
Sven Köhler Supriya Gulati Gongjing Cao Quinn Hart Bertram Ludäscher

In many areas of science unbounded (potentially infinite) data streams need to be processed in a continuous manner, e.g., to compute running aggregates or sliding window aggregates. One important example is the computation of Growing Degree Days (GDD) from a stream of temperature data, which provides a heuristic tool to predict plant development and the maturity of crops. The process of data ac...

Journal: :Annals of botany 2003
Gregory S McMaster W W Wilhelm D B Palic John R Porter P D Jamieson

Extensive research shows temperature to be the primary environmental factor controlling the phyllochron, or rate of leaf appearance, of wheat (Triticum aestivum L.). Experimental results suggest that soil temperature at crown depth, rather than air temperature above the canopy, would better predict wheat leaf appearance rates. To test this hypothesis, leaf appearance in spring wheat ('Nordic') ...

Journal: :Current Trends in Natural Sciences 2021

The soil and climate conditions in Romanian Northeastern area are favorable for cherry cultivation, but some times can occurred calamities. paper presents a study which during 2020 at the Research Station Fruit Growing (N-E of Romania), using five sweet genotypes as research material: ‘Van’, ‘Croma’, ‘Elaiași’, ‘HC920402’, ‘HC930208’. Observations determinations were performed regards to frostd...

Journal: :پژوهش های تولید گیاهی 0
سلیم فرزانه بهنام کامکار دانشیار گروه زراعت دانشگاه علوم کشاورزی و منابع طبیعی گرگان فرشید قادری فر دانشیار گروه زراعت دانشگاه علوم کشاورزی و منابع طبیعی گرگان محمد علی چگینی دانشیار موسسه اصلاح و تهیه بذر چغندر قند

background and objectives: the most important determining factor in sugar beet root yield is seed quality. seeds with germination percentage are lower; the germination is slow and non-uniform, will produce plants that initial growth is slow. according to various studies indicate that harvest time is an important factor influencing the quality of sugar beet seed. in the early harvest of sugar be...

2013
J. Grira Y. Bédard S. Roche

The aim of this research is to design a collaborative framework that integrates risk analysis activities into the geospatial database design (GDD) process. Risk analysis is rarely undertaken iteratively as part of the present GDD methods in conformance to requirement engineering (RE) guidelines and risk standards. Accordingly, when risk analysis is performed during the GDD, some foreseeable ris...

2013
Gholam Reza ZAMANI Reza SHERVIN-BADV Ali NIKSIRAT Houman ALIZADEH

OBJECTIVE Central Nervous system (CNS) malformations are one of the most important causes of global developmental delay (GDD) in Children. About one percent of infants with GDD have an inherited metabolic disorder and 3-10 percent have a chromosomal disorder. This study aimed to survey the frequency of brain structural anomalies and their subtypes among the variety of etiologic factors in child...

Journal: :Bulletin of the Entomological Society of America 1985

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