Silvicultural operation need to notice the species diversity. To this study Gomarlang district in marivan region, northern zagros forest was selected. In this study 30 circle sample plots (500 m2) were collected by random method. In every sample plot the kind of species and number of trees and shrub were recorded. In the sample plots the micro plots of 5 m by 5 m (i.e. area of 25 m2) were desig...

Understanding species diversity and disturbance relationships is important for biodiversity conservation in disturbance-driven boreal forests. Species richness and evenness may respond differently with stand development following fire. Furthermore, few studies have simultaneously accounted for the influences of climate and local site conditions on species diversity. Using forest inventory data,...

Trees on agricultural fields can have a positive or negative impact weed seedbank (WSB) due to diverse environmental and soil characteristics. Therefore, samples were drawn in six cropping systems [two agroforest (AFS): guava, mango; three horticulture (HCS): mango, Indian gooseberry; annual crop system (ACS)] at two landscape positions (lowland upland) depths (0-15 cm 15-30 cm) using factorial...

In 1942, Henry Sigerist questioned the idea that "the German way in public health was to enforce health through the police while the English way consisted in acting through education and persuasion".2 Contrasts of this kind have, however, remained commonplace throughout the twentieth century.3 In the 1950s, George Rosen sought to reframe the history of public health in order to understand how i...

We present the results of first ever research on biodiversity and biogeography marine benthic diatoms from coral reefs tropical islands Indonesia, including West Borneo, East Java, South Celebes, Komodo, Rinca Flores. The sampled offer a broad range reef microhabitats host diatom assemblages seaweeds, sea grass, dead corals, scrapes other biological surfaces, sand, rocks solid surfaces. this st...

Intercropping of corn and soybean is widely practiced in agricultural production. However, few studies have investigated the effect intercropping fertilizer reduction on yield. In present study, were interplanted 2:2, 2:3 2:4 ratios. Two levels (normal: 600 kg/ha VS. reduced: 375 kg/ha) set. The effects planting patterns growth yield soybeans studied based changes enzyme activities related to n...