In this study, aerial parts of Lippia citriodora Kunth were harvested at three phenological stages (i.e. vegetative, full flowering and fruit set). The essential oil isolated by hydro distillation for 3 h using a Clevenger-type apparatus and the oil was analyzed by GC and GC-MS. The yields of oils (w/w%) in different stages was in the order of: full flowering (0.9%), vegetative (0.48%) and frui...

Humic acids are the most active components of soil organic matter and have been shown to have an hormone-like activity thus stimulating plant growth. The objective of this work was to verify the quantitative and qualitative yield responses of the table grape cv. Italia after the application of a humic acid at various phenological stages. The humic acid used in this study has been extracted from...

The polarimetric behaviour of rice fields at different phenological stages has been analysed by using time series of TerraSAR-X images. These are X-band copolar dual-pol images available for the whole growth cycle. As plants grow, changes in their morphology produce clear signatures in various polarimetric observables. Based on this sensitivity to phenology, a physically based retrieval approac...

in order to study of efficiency total dual purpose herbicide and mixed granestar and acsiyal herbicides, and response of wheat at growth various stages to the aforementioned herbicides, an experiment with randomized complete block design with three replications were conducted during 2008-2009 in a field experiment at ramin agricultural and natural resources university, khouzestan. treatments in...

safflower oil seed has high adaptability to different kinds of abiotic stresses such as drought and salinity. the aim of this study was to evaluate the effects of drought stress at different phenological stages on relative water content (rwc), leaf canopy temperature, seed yield and its components in spring types of safflower. the study was carried out in east azarbaijan research center for agr...

in this study, aerial parts of lippia citriodora kunth were harvested at three phenological stages (i.e. vegetative, full flowering and fruit set). the essential oil isolated by hydro distillation for 3 h using a clevenger-type apparatus and the oil was analyzed by gc and gc-ms. the yields of oils (w/w%) in different stages was in the order of: full flowering (0.9%), vegetative (0.48%) and frui...

Knowledge on habitat characteristics and nature of regional vegetation inrangelands is a prerequisite for any planning and proper range management along withsustainable development of renewable natural resources. Rangelands in southern andwestern highlands of Kashan, Iran are of good vegetation diversity but unfortunately,palatable and desirable species are endangered in recent years. This rese...

determination of chlorophyll content and chlorophyll fluorescence has the potential needed to analyze the efficiency of photosynthesis in plants against environmental stresses, especially salinity, and its simplicity facilitates stress evaluation. in order to study the response of different photosynthetic characters to salinity stress at different sugar beet growth stages, two separate experime...