salinity is one of the most restrictions in plant growth in dry and semi dry land which effects production of many crops such as sesame. in order to study the phenology and morphology characteristics of 43 ecotypes and line of sesame (sesamum indicum l.) under salinity of irrigation water (5.2 ds.m-1) a field experiment was conducted at research farm of center of excellence for special crops, f...

Sea buckthorn fruits are a pharmacopoeial raw material used to produce sea oil. Other parts of the plant (bark, leaves, and shoots) objects research aiming expand base use limited natural resources rationally. leaves rich in biologically active compounds, including flavonoids. The aim study was develop validate an analytical procedure for quantification flavonoids using spectrophotometry visibl...

 Rosemary (Rosmarinus officinalis L.) is an important medicinal plant that contained a wide range of secondary metabolites such as rosmarinic acid. In this study, essential oil content and composition and rosmarinc acid were determined at three phenological stages (before flowering, full flowering and fruit set stages). Hydro distillation method was used for essential oil extraction and GC and ...

Crop depends on its canopy to intercept solar radiation to drive both assimilation and water, nutrient absorption for its growth. Field experiments, involving three sowing time and three sowing rate, were conducted at Luancheng Station to investigate the effects of canopy size and development on crop growth and radiation use efficiency (RUE) of winter wheat during 2009/2010 and 2010/2011 gr...

Background: Thymus daenensis is on e of the endemic aromatic species in Iran that its essential oil is used in food and pharmaceutical industries. Objective: In this study, the effects of plant growth stages and distillation methods on essential oil content and thymol percentage of this species were evaluated. Methods: The aerial parts of Th. daenensis were collected in three stages of plan...

The objectives of this work were to determine the heliotropic movements of the upper trifoliates for two soybean cultivars, BR 16 and Embrapa 48, during a daily cycle, in three phenological stages and two water regimes, and to estimate the impact of irrigation and daily leaflet movements on agronomic characteristics and grain yield. Heliotropic movements were studied in three phenological stage...