نتایج جستجو برای: biological index
تعداد نتایج: 843745 فیلتر نتایج به سال:
Microzooplankton plays an important role in aquatic food web and they act as trophic intermediates between the phytoplankton and higher trophic levels. The purpose of this investigation was to study the ecological situation of bahmanshir base on biological indexes calculation. Biological indexes of zooplankton in coastal region of bahmanshir waters were investigated. Samples were collected usin...
in order to study the effects of different irrigation regimes and nitrogen fertilizer levels on yield and yield components of chickpea (ilc482), a field experiment involving chickpea genotype ilc482 was conducted as factorial arrangement based on a randomized complete block design with four replications in the agricultural research station, ferdowsi university of mashhad during growing season o...
Summary The vast, uncoordinated proliferation of bioinformatics resources (databases, software tools, training materials etc.) makes it difficult for users to find them. To facilitate their discovery, various services are being developed to collect such resources into registries. We have developed BioCIDER, which, rather like online shopping 'recommendations', provides a contextualization index...
Ratooning means regrowing of rice plant after harvesting of first product which is specific physiologic characteristic of rice plant. It is an effective method for increasing of efficiency of production along with less investment and also lack of necessity for increasing of the field of rice plant. Ratooning more over, affects on the optimal usage of agricultural field. In order to achieve this...
Fertilizer management plays an important role in obtaining satisfactory yields from maize. In addition, fertilizer management is essential for achieving sustainable agriculture and protecting the environment. This research was conducted by split plot experiment based on randomized complete block design with four replications. Main factor was integrated with chemical and biological fertilizers i...
An experiment was conducted to study the effects of some agro-technical factors (plant density, sowing date and cultivar) on qualitative and quantitative yield in two cultivars of Red bean (Phaseolus vulgar cv. Saiad, Naze) under the climatic conditions of Zanjan. The experiment was executed as split-plot factorial based on randomized complete block design with three replication. Sowing date w...
Identifying selection indices is the most important step of a breeding project that aims to improve grain yield. The definition of the selection index is usually done by evaluating the variables in multivariate statistical methods. In the present study, the relationship between grain yield and its components in bread wheat genotypes was determined by multivariate statistical methods. The experi...
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