The effect of plant residual on establishment of crops

In order to evaluation of plant residual on establishment of crops an experiment was conducted during 2006- 2007 in Sharood Universiy of Technology in Iran. The experiment was as factorial in Completely Randomized Design with 4 replications. The residual of Triticum aestivum, Beta vulgaris, Zea mays and Brassica napus and distilled water as check were tested on themselves and other crops. The results showed residual of crops had different effect on growth of themselves and other crops. Germination percentage, speed of germination, root dry weight, stem dry eight, root length, stem length, root/shoot ratio and plant growth traits were significantly affected by residual of Beta vulgaris, Zea mays, Triticum aestivum and Brassica napus respectively

The study of azotobacter-chroococumInoculationon yieldand post harvest quality of wheat

In order to evaluation of the effect of Azotobacter-chroococum on two varieties of wheat grown under field conditions, an experiment was carried out in Agricultural Research Station of Shahrood University of Technology during 2004-2006. results showed that wheat yield was affected when cultivars inoculated. Inoculation resulted in improving post harvest seed germination and nitrogen content of the seed

The study of phenotypic variation and cluster analysis for quantitative traits of corn (Zea mays L.)

In order to study the relationships between grain yield an experiment was carried out in randomized complete block design with four replications in Shahrood Agricultural Research Station during 2006-07. Cluster analysis with minimum ward variance method grouped the hybrids in 4 groups. In order to proving the truth of the classification obtained from cluster analysis discriminate function analysis and multivariate analysis verified the accuracy of classification from cluster analysis and grouped the hybrids in 4 groups. Result of four methods of multivariate analysis of variance Wilk's lambda showed that there were significant differences between 4 groups resulted from the cluster analysis

Relation of Inoculation of Bradyrhizobium japonicum and Mycorrhizal Fungus with Root Colonization, Quantity and Quality of Soybean (Glycine max) Yield in Different Levels of Potassium

The effect of inoculation of Bradyrhizobium and mycorrhizal fungus on root colonization, yield quantity and quality of soybean (Glycine max) in different levels of potassium, Studied by field experimental in Shahrood University Agricultural Research Station during growing season of 2012. The experiment was a factorial experiment based on randomized complete blocks design (RCBD) with three replications. The factors included mycorrhizal inoculation (non-inoculated and inoculated with Glomus intraradices), nitrogen fixation bacteria inoculation included (non-inoculated and inoculated with Bradyrhizobium japonicum) and potassium fertilizer (0, 100 and 200 kg.ha-1). Results showed that mycorrhizal factor significantly affected all of studied traits except number of seeds per pod, number of pods per plant and grain yield.Mycorrhizal inoculation significantly increased pod dry weight, root colonization percent, protein percent, oil percent and biological yield. Bradyrhizobium inoculation factor significantly affected all of studied traits. The potassium fertilizer factor significantly affected all of studied traits except number of seeds per pod trait. In most cases between 100 kg.ha-1and 200 kg.ha-1of fertilizer was not significant difference. Dual inoculation of mycorrhizal and Bradyrhizobium bacteria interactions significantly affected number of pods per plant, oil percent and root colonization percent. Bradyrhizobium, mycorrhizal fungi and potassium interactions significantly affected all of studied traits except number of seeds per pod

Correlation coefficient analysis between grain yield and İts components in corn (Zea mays L.) hybrids

In order to study of the correlation coefficient analysis between grain yield and its components in maize hybrids an experiment was carried out in randomized complete block design with four replications in Shahrood Agricultural Research Station during 2006-07. The result of correlation analysis between grain yield and other traits showed that number of grains per ear and 100 grain weights had high and positive direct effects and ear length had positive and moderate direct effect on yield. Furthermore, ear height had low and negative direct effect on grain yield