Due to having spring and autumn genotypes and adaptation to weather conditions, rapeseed is considered as a point hope to provide edible oil of country. Two separate experiments were set up as split-plot in a RCBD design with three replications in two fall and winter seasons during two years (2014-2015 and 2015-2016) at the research field of Seed and Plant Improvement Institute to investigate the effect of sowing season and date on the quantitative and qualitative yields of rapeseed genotypes in Karaj, Iran. In this study, the main plots were sowing dates (7, 17, and 27 October in fall sowing and 9 and 19 February, and 1 March in winter sowings) and sub-plots consisted of genotypes (RGS003, Dalgan, Zabol10, Hyola401, and Hyola4815). Rapeseed genotypes GRAIN and oil yields were 4330 and 1840 kg ha-1 in fall sowing, respectively, while these traits were decreased 43.3 and 46.6% respectively, when rapeseed genotypes were planted in winter season. The highest GRAIN and oil yields (5033 and 2202 kg ha-1) belonged to 7 October sowing date in fall sowing, while 9 February had the highest GRAIN and oil yields (2996 and 1248 kg ha-1) in winter sowing. In general, the Dalgan genotype is recommended for cultivation due to suitable agronomic traits such as number of silique per plant, number of GRAIN per silique, silique length, 1000-GRAIN weight, as well as high GRAIN and oil yields in cold temperate regions with arid and semi-arid climates such as Karaj, Iran.

To assesse the iron and silicon effects on the yield and physiological characteristics of green pea, Wando cultivar by ASGrow Corporation was used in three levels of iron chelate (0.05, 0.1 and 0.3 gr per l-1) and silicon (0, 14 and 28 mg per l-1), as a factorial experimental in completely randomized design with three replications. In this experiment, characterisics such as fresh and dry weight of GRAIN, the number of GRAIN per pod, concentration of Fe, Cu, Mn, Zn and Si in leaf and GRAIN were measured. Results showed that the interaction of Fe and Si was significant at p<0.01 on GRAIN fresh and dry wigeht, concentratin of leaf and GRAIN Fe, leaf Mn, leaf and GRAIN Zn and leaf Si and the application of Fe and Si was significant separately, on other traits such as number of GRAIN per pod, concentration of leaf and GRAIN Cu, Mn and Si in GRAIN.  The Mean squares showed that the application of Fe and Si significantly increased fresh and dry GRAIN weight and Si laef concetration and decreased the concentratin of leaf and GRAIN Fe and Mn as well as GRAIN Mn.  The enhancement of Fe and Si application separately decreased the concentration of Mn, Cu and zinc leaf and GRAINs, but the Si concentration of leaf and GRAIN were increased by Si application. The concentration of Fe, Mn, Cu and Zn were decreased in leaf and GRAIN because of antagonistic effects. It can be concluded that Si reduces the harmfull effects of high levels of iron toxicity and the application of 0.1 g/l and 25 mg/l can be recommended as the best treatments.

In order to identify the correlations and relationships between different traits in the bread wheat, 30 genotypes were investigated as sub-factors under the split plot experiment in the completely randomized design in greenhouse and the randomized complete block design in the field with three replications under the normal irrigation and post-anthesis water stress conditions. The results of the canonical correlation analysis showed that at both normal and moisture stress levels, there was a significant correlation between the pair of canonical variables obtained from the phenological traits and the yield components. Under the normal conditions in the greenhouse, to increase the spike density and length, the number of days to 50% flowering can be considered as a suitable selection criterion. According to the results of canonical correlation analysis, under the stressed conditions in greenhouse, to increase the spike length, the number of days to the heading, maturity and 50% of flowering were among the important and effective factors. Under the optimum irrigation conditions in the field, the number of days to maturity was considered as one of the factors influencing the seed weight per spike. The results of canonical correlation analysis under the field stress conditions showed that to increase the 1000-seed weight, the number of days to maturity can be considered an appropriate selection criterion.

Henbane has a high medicinal value due to the presence of hyoscyamine and scopolamine alkaloids. Improving the quality and quantity of henbane alkaloids using modern breeding methods requires evaluating the genetic diversity. The genetic diversity of henbane has been investigated using morphological, biochemical and molecular markers in several studies and the superiority of molecular markers over other markers has been proven. To this end, in 2018, the genetic diversity of 96 henbane genotypes collected from the habitats of northwest Iran was investigated using IRAP and REMAP molecular markers. For IRAP markers, out of 36 possible combinations obtained from eight LTR primers, seven combinations had a fine and scalable amplification. In the REMAP technique, the combination of 11 ISSR primers with eight LTR primers was used, and 12 combinations could be scored out of 88 possible combinations. The average amount of polymorphic information for IRAP and REMAP markers was 0. 30 and 0. 32, respectively, and the average marker index for these two markers was estimated as 2. 59 and 2. 47. Based on these criteria, REMAP marker was more efficient than IRAP in estimating the genetic diversity of henbane. In the analysis of molecular variance using IRAP and REMAP markers, intra-population variability was estimated to be higher than inter-population, which indicates the high diversity of these populations in northwestern Iran. Cluster analysis based on IRAP marker failed to separate species and populations, but REMAP marker was able to separate H. pusillus and H. reticulatus species to a high degree. A high shannon index in this research suggests that IRAP and REMAP retrotransposon markers resulted in a high genetic diversity within henbane populations with a high insertion in the genome of henbane populations.

To investigate the response of corn to combined application of chemical fertilizers with rhizobacteria plant growth promoting, an experiment was conducted in 2017 at Research farm of Agricultural and Natural Resources Campus of Tehran University, Karaj, Iran, in a randomized complete block design with four replications. Four nutritional treatments including T1 (Control treatment without applying fertilizer), T2 (Just PGPRs), T3 (Use chemical fertilizers based on soil test) and T4 (T3 + PGPRs) were considered. According to the results, the highest total dry weight (3.9 kg/m2), crop growth rate (79.8 g.m-2.day-1), net assimilation rate (15.3 g.m-2.day-1) and GRAIN yield (18.2 ton.ha-1) were observed in T4 treatment and T2 treatment produced the highest  leaf area index (5.3), leaf area duration (205.2) and specific leaf weight (78.5 g.m-2) . Also, the lowest value of all traits was observed in in T1 (control) treatment. The results showed that the presence of rhizobacteria plant growth promotioninduction in the corn nutrition program increased the growth and growth indices of the plant. Combined application of chemical fertilizers with rhizobacteria plant growth promoting resulted in the highest growth and final GRAIN yield of corn.

In order to investigate the effects of temperature and radiation on rate and duration of GRAIN filling and final GRAIN weight in rice cultivars, a split plot experiment based on randomized complete block design with three replications was conducted at different transplanting times at the research field of University of Guilan, Rasht, Iran in 2013. Factors were: transplanting dates in main plots (5 May, 20 May and 5 June) and rice cultivars (Hashemi, Ali Kazemi, Sangejo, Khazar, Dorfak and Gouhar) in sub plots. The greatest GRAIN weight (31.9 mg) was obtained in Gouhar at 20 May and the smallest GRAIN weight (20.4 mg) was observed in Sangejo at 5 June transplanting dates. The longest effective filling period (32.9 days) was achieved in Gouhar at 5 May transplanting date and the shortest GRAIN filling duration (13.9 days) was obtained in Hashemi. The greatest GRAIN filling rate (1.62 mg day-1) was obtained in the Hashemi and the smallest rate (0.92 mg day-1) was observed in Gouhar. Significant correlations were observed between cumulative temperature and radiation with final GRAIN weight (R = 0.689). There were significant and positive correlations between the cumulative temperature and irradiance with GRAIN filling duration, in contrary to negative correlations with GRAIN filling rate and GRAIN filling period. The results of this experiment showed that the GRAIN filling duration plays a greater role, than GRAIN filling rate, in determination of the GRAIN weight. It could be concluded that an early transplanting (5 May) brings about favorable temperature and radiation conditions for an appropriate GRAIN filling period and a greater final GRAIN weight.

To evaluate and identify high yielding triticale lines syuiable to cold, temperate and warm agro-climatic conditions of Fars province, a field experiments were carried-out in Eqlid, Zarghan, and Darab agricultural research stations in 2012-2013 growing season. Twenty-nine triticale advanced lines (received from CIMMYT) were cultivated along with Juanilo 92 variety (check) in randomized complete block design with three replications. Each plot was four meters long with 1.2 meter in width. Fertilizers were applied based on soil analysis. The results showed that the highest GRAIN yield (7450 kg ha-1) obtained from Darab and the lowest (2800 kg ha-1) from Eqlid. In Zarghan, Juanilo 92 variety had the highest GRAIN yield (7300 kg ha-1). In Darab, the highest GRAIN yield belonged to lines no. 2 and 21 with 8966 and 8900 kg ha-1, respectively. The results showed that the average GRAIN yield of lines no. 8, 7 and 21 in all three locations were 1.8, 3.5 and 12.9 percent higher than Juanilio 92, respectively.

This study was conducted during summer and winter of 2018- 2019 in the agricultural research field of Shahid Chamran University. Experimental design was split- plot based on RCBD with three replications. The main plot was the type of agricultural system in three levels including conventional (Conv), organic (Org) and sustainable (Sust) (integrated between Conv and Org) and sup- plot was the type of pre- cultivated crop in sequence with wheat including cultivation of mung bean (M- W), corn (C- W), sesame (S- W) and fallow (F- W). Yield quantity (yield and its component) and quality (GRAIN protein), an estimate of photosynthesis matter transfer index of wheat and soil organic carbon (SOC) after one double-cropping were measured. The result showed that the highest (545.04 g/m2) and the lowest (409.28 g/m2) seed yields were obtained in Conv and Org respectively. In contract, with the changing type of system from Conv to Org, GRAIN protein was increased significantly (from 8.3 to 9.6 %). In addition, the highest (535.47 g/m2) yield of wheat was obtained from M- W double cropping. On the other hands the highest remobilization and current photosynthesis matter were obtained in the organic agricultural system with M- W and conventional with M- W double cropping. The situation of SOC showed that the highest (33.18 mg/g) SOC was obtained in the organic agricultural system with C- W double cropping. The reason for improving SOC in the organic and sustainable agricultural system was application of organic matter (compost and vermicompost) and crop residue management. Totally, from the crop ecology point of view, sustainable agricultural method with a sequence of M- W was the most desirable system.