Common wild rice (Oryza rufipogon Griff.) is important to broaden the narrow genetic diversity of cultivated rice. To better understand the genetic variation, heritability and genetic correlations of agronomically important traits, 156 F2:3 families derived from the cross between rice (Oryza sativa) and wide rice (O. rufipogon Griff.) were evaluated under field conditions. The Analysis of Varia...

An experiment was conducted using a randomized complete block design to estimate genetic variability of ten rice genotypes. Analysis of variance for yield and yield contributing traits showed significant (p<0.01) variation among the genotypes. Results of genetic analyses showed a higher phenotypic coefficient of variation compared to their corresponding genotypic coefficient of variation for al...

Plastic film mulching (PM) is widely utilized for maize production in China. However, the effect of PM on the grain yield of crops has not been established, and the biochemical mechanism underlying the increase or decrease in grain yield under PM is not yet understood. Grain filling markedly affects the grain yield. The objective of this study was to investigate the effects of PM on maize grain...

Two field experiments were carried out in a newly reclaimed sandy soil under sprinkler irrigation system at El Ismailia Agricultural Research Station, Governorate, Egypt during the winter seasons of 2017/2018 and 2018/2019, to study effect organic amendment (compost FYM) different rates nitrogen fertilizer (control, 75 100 % recommended dose) on fertility wheat productivity. The treatments arra...

Abstract A field experiment was carried out in the Um Al-Akf region,(5 km from center of Al-Muthanna Governorate), season (2021-2022), with aim studying effect tillage systems and foliar spraying boron on growth yield characteristics soft wheat. The according to Split Block Design method, using sector design. Completely randomized (RCBD) three replications, included two factors, first factor (n...

The ultraviolet energy distribution of quasars shows a sharp steepening of the continuum shortward of 1000 Å (rest-frame). We describe how we came to consider the possibility that this continuum break might be the result of absorption by carbon crystallite dust grains.

We propose a simple model for density fluctuations of aerodynamic grains, embedded in a turbulent, gravitating gas disc. The model combines a calculation for the behaviour of a group of grains encountering a single turbulent eddy, with a hierarchical approximation of the eddy statistics. This makes analytic predictions for a range of quantities including: distributions of grain densities, power...