The rice plant need the silicon element more than other nutrition elements, but its importance has not been clearly known. In order to study of silicon effect on the growth and yield of rice (Tarom Hashemi variety), an experiment was carried out in pot and field conditions with three replicates in the greenhouse and in the field of Rice Research Institute of Iran (Amol) in 2009 and 2010. Three...

Environmental stresses such as deficit irrigation and ultraviolet radiation can influence plant growth and development. Among the environmental variables, ultraviolet radiation is an important factor in plant response to other stresses, such as deficit irrigation. The purpose of this study was to investigate the effects of ultraviolet B radiation (UV-B), irrigation stress and combined effects o...

Soil erosion is one of the most serious environmental issues in the world. Vegetative buffer strips include a specific plant being passed by flow before entering the waterways, so it causes to reduce runoff volume, deposited pesticides and other pollutants of the flow through infiltration, absorption and sediment deposition. The present study has been carried out with aim to investigate the eff...

Despite its economic importance, not much information exists on growth and productivity of durum wheat in Iran and Isfahan. In order to evaluate growth, grain yield, and attributes in three durum wheat genotypes, Osta/Gata, Dipper-6, and PI40100, with five planting densities of 200, 275, 350, 425 and 500 seeds/m2, a four-replicate RCBD field study with a spilt-plot layout was carried out in win...

In order to investigate the effects of plant density and pruning on yield characteristics and growth of two bell pepper cultivars, a 2×3×2 factorial experiment was conducted in a complete randomized block design with three replications and three factors of plant density (2.5, 3 and 3.5 plants per m2), shoot pruning at two levels (without pruning and training plants with 3 main stems) and two be...

A greenhouse study was undertaken to assess the salt tolerance of two citrus rootstocks, namely, Bakraii (Citrus sp.) and Trifoliate orange (Poncirus trifoliata). A factorial experiment through a completely randomized design (CRD) with three replications and four levels of salt including 0, 20, 40 and 60 mM NaCl was conducted. After eight weeks of treatment, number of leaves, plant height, leaf...

Root-knot nematodes cause physiological and anatomical disorders in plants. The present study contains the results of an investigation of the effect of Meloidogyne incognita race2 on the growth of roots and aerial organs of tomato under greenhouse conditions. The experiment in a completely randomized design split split plot on two susceptible (Falat Y) and tolerante (Gina VF) tomatoes variety w...

Abstract Since economic growth affects many economic indexes such as employment, poverty, distribution of income, health, etc., investigating the factors influencing economic growth is of great importance. This would be even more important in developing countries, which face such problems as poverty, unemployment etc. Considering the fact that the VAT is becoming more popular in developing cou...