Here, the growth-differentiation balance hypothesis (GDBH) was tested by quantifying temporal variation in the relative growth rate (RGR), net assimilation rate (NAR), and phenylpropanoid concentrations of two willow species (Salix sericea and Salix eriocephala) across five fertility levels. Initially, RGR increased and total phenylpropanoids declined (although every individual phenolic did not...

Soil nutrient is an important aspect that contributes to the soil fertility and environmental effects. Traditional evaluation approaches of soil nutrient are quite hard to operate, making great difficulties in practical applications. In this paper, we present a series of comprehensive evaluation models for soil nutrient by using support vector machine (SVM), multiple linear regression (MLR), an...

Introduction: North Khorasan province has experienced fertility decline and negative population growth during the last decade. Attitude towards value of children is one of the main determining drivers of fertility. Method: The research method was cross-sectional survey. The sample size was 166 married women aged 15-49 that were selected by multistage sampling method. Data collection instrument...

Restoring biological soil crusts (biocrusts) in degraded drylands can contribute to recovery of ecosystem functions that have global implications, including erosion resistance and nutrient cycling. To examine techniques for restoring biocrusts, we conducted a replicated, factorial experiment on recently abandoned road surfaces by applying biocrust inoculation (salvaged and stored dry for two ye...

introduction: the theory of value of children refers to the needs which children provide for their parents. considering the close relationship between the value orientation of people with the decisions in organizing life and forming a family, including having children, and according to decreased fertility rate in iran, the present study was performed with aim of intergenerational comparison of ...

BACKGROUND Despite growing consumer demand for organically produced foods, information based on a systematic review of their nutritional quality is lacking. OBJECTIVE We sought to quantitatively assess the differences in reported nutrient content between organically and conventionally produced foodstuffs. DESIGN We systematically searched PubMed, Web of Science, and CAB Abstracts for a peri...