The aim of the study was to evaluate how specific cutting energy is influenced by variation wood basic density in Eucalyptus spp. clones. Five clones, 10 years old, were used study: three hybrids grandis x urophylla, one and urophylla. From each clone, five trees cut down divided into 2.0 m long logs. In two axial regions trunk (from 2.5 4.5 from 6.5 m) logs boards reduced specimens with dimens...

functional response of trichogramma brassicae bez. to different densities of eggs of two host species anagasta kuehniella zell. and plodia interpunctella hub. was studied under laboratory conditions (24±1°c, 65±10% rh and 16: 8 l:d photoperiodism). one day old eggs of either host were offered to individual females of t.brassicae in densities 2, 4, 8, 16, 32, 64 and 128 respectively in 21, 15, 1...

the ever increasing rate of power consumption has led to an increase in public exposure to extremely low frequency magnetic fields (elf-mfs) and brought severe concerns about their health effects. considering previous studies and the facts about potential health effects of these fields, the present study aimed to evaluate the elf-mf flux densities from power distribution lines near hospitals in...

The distribution pattern of Bullacta exarata was studied in different seasons of 2004 at south shore of Hangzhou Bay, China. We found that the distribution pattern of B. exarata was aggregated in each season by Taylor's power regression and Iwao's plot regresses methods (P < 0.001). Based on two-way ANOVA analysis, the results indicated that the densities were significantly affected by the fact...

Abstract The migration of nitrogen (N) from farmland to lake aggravates eutrophication. Riparian buffer strips (RBSs) are crucial in alleviating into water bodies. This study examined the impacts different RBS patterns on removal. effects RBSs various widths (5, 15, 30, and 40 m), with vegetation types (Taxodium hybrid ‘Zhongshanshan’, poplar (Nanlin-95), a mixed forest T. ‘Zhongshanshan’ popla...