objective: importance of management of gardens weeds is an issue that unfortunately has less been investigated by weeds researchers of country. one of the most important restrictive agents of cultivated surface and producing crops of citrus orchards are weeds. methods: to achieve this purpose, a research was performed in plot of valencia orange trees of citrus fruits of dezful in 2013. this pro...

Objective: Importance of management of gardens weeds is an issue that unfortunately has less been investigated by weeds researchers of country. One of the most important restrictive agents of cultivated surface and producing crops of Citrus orchards are weeds. Methods: To achieve this purpose, a research was performed in plot of Valencia orange trees of citrus fruits of Dezful in 2013. This pro...

Objective: Importance of management of gardens weeds is an issue that unfortunately has less been investigated by weeds researchers of country. One of the most important restrictive agents of cultivated surface and producing crops of Citrus orchards are weeds. Methods: To achieve this purpose, a research was performed in plot of Valencia orange trees of citrus fruits of Dezful in 2013. This pro...

We examined the effects of fertilization and gypsy moth defoliation of hybrid poplar (Populus ×canadensis Moench ‘Eugenei’) on ectomycorrhizal (ECM) and arbuscular mycorrhizal (AM) fungal colonization, ECM richness, and ECM composition in the summers of 1997 and 1998. The factorial experiment included two levels of defoliation (defoliated and control) and fertilization (100 kg N·ha–1 and contro...

Echinacea purpurea (L.) Moench, a member of the Asteraceae family, is a plant rich in flavonoids, essential oils, phenolic compounds, saponins, polysaccharides and glycoproteins. The aim of the study was to evaluate the protein content in dried roots of Echinacea purpurea (L.) Moench after homogenization of roots with liquid nitrogen, extraction in 0.01 mol L-1 phosphate-buffered saline (PBS) a...

Several groundwater experts have recently observed that groundwater in developing countries is by and large being left unmanaged (e.g. Katar Singh 1995; Van Steenbergen 1997). They have repeatedly deplored the absence of effective regulatory mechanisms. Nevertheless, a consensus now seems to be growing that groundwater is too valuable to be left unmanaged ; law and administration are needed to ...

El objetivo del estudio fue comparar la selección directa, indirecta e índices combinados de selección, en el mejoramiento rendimiento grano y los componentes número peso sorgo (Sorghum bicolor L. Moench). Se usaron cuatro poblaciones F2 una generación progenies F3, diferentes tamaño granos. trabajo se realizó Universidad Nebraska, EEUU. La evaluación las hizo 1997 localidad, progenie F3 (99 fa...