Abstract This paper aims to thoroughly analyze the effect of polyethylene terephthalate (PET) plastic aggregate on concrete compressive strength using a meta-analysis. Forty-three datasets for containing PET coarse and 60 data sets fine were collected. The input variables used percentage nominal maximum size along with mix proportions. Main plots, contour surface plots expressions presented dem...

this experiment was conducted to improve the nutritive value of barley stubble for two consecutive years. after harvesting crop, at first year, a completely randomized design, with a 3 × 3 factorial experiment was conducted in which 27 plots were divided into nine treatments. the treatments including zero, 2.5 and five percent urea each with zero, three and six percent molasses were mixed with ...

Background Pseudomyxoma peritonei (PMP) is a rare disease, with the rate of overall survival (OS) influenced by many factors. The present study aimed to define independent predictors and establish nomogram for individual risk prediction in PMP patients. Methods One hundred forty-seven patients were consecutively included between June 1, 2013, November 22, 2019. log-rank test was used compare OS...

weed's behaviors differ in a multiweed-crop competition system compare to a mono weed-crop competition system. the present investigation was carried out in mashhad, iran, to study the effect of weeds, which emerged naturally in a multi species community along side with melon, on quantitative and qualitative characteristics of the crop during 2007. thirty five plots were selected randomly in a g...

some criteria of density in beech saplings were studied in various forest associations (mainly galio odorati-fagetum typicum) growing in the submontane region near zurich (swiss central plateau). the sample plots were established in regeneration gaps resulting from swiss irregular shelter wood system (femelschlag). five sample plots, each 2x2m in 3 transects (a total of 15 plots in each gap, x ...

Infestations by the weedy perennial plant Lantana camara L. (lantana) cause major disruptions to biodiversity; however, the effects of lantana on soil fungal communities are poorly understood, yet may interrupt important mutualisms in natural and semi-natural ecosystems. This research is aimed at understanding the impacts of lantana on the soil fungal community of five sites on contrasting soil...

We estimated carbon allocation to belowground processes in unfertilized and fertilized red pine (Pinus resinosa Ait.) plantations in northern Wisconsin to determine how soil fertility affects belowground allocation patterns. We used soil CO(2) efflux and litterfall measurements to estimate total belowground carbon allocation (root production and root respiration) by the carbon balance method, e...

In view of evident changes in the reaction of European beech (Fagus sylvatica L.) to environmental changes, five plots with young trees of the same age were established and studied on natural beech sites. Beech trees were equally distributed along the light gradient and were divided according to light conditions. The parameter used for evaluation of light conditions was the indirect site factor...