KEYWORDS Micronutrient SoybeanWater deficit stress Yield parameters ABSTRACTEffects of foliar application of molybdenum and iron either individually or in combination on the yield properties of soybean crop were investigated under water deficit condition at research farm of Sari Agricultural Sciences and Natural Resources University, Sari, Iran during the cropping season of 2014. This experiment was laid out in factorial arrangement based on completely randomized block design with three replications. The two irrigation regimes were used (Irrigation after 65 and 130 mm evaporation from Class A pan) as primary factors while spray application of micronutrient (water as control Fe, Mo and Fe + Mo) were considered as the secondary factors. Result of study revealed that drought stress and micronutrient sprays have effect on all studied parameters such as pod number, seed number, yield and weight of 1000 seeds. Also, the interactions were statistically significant among studied parameters. According to the results drought stress severely impressed the number of pods, total seed numbers, seed yield, seed protein and seed oil. Furthermore, using of micronutrients spray particularly Fe+Mo on soybean crop is environmentally acceptable strategy and reduced the damages caused by water deficit condition.

<p>This study was conducted to evaluate the effect of three polyamines (PAs) on antioxidants capacity, free radical scavenging and vase life improvement of spray carnation cut flowers. Hence, the cut flowers were dipped in different concentrations (0, 1, 2 and 3 mmol) of putrescine (Put), spermidine (Spd) and spermine (Spm) for 24 h. After treatment, the cut flowers were placed in distilled water and kept at 20 °C ± 2 °C, 70-80 % RH. All concentrations of Put treatment improved the vase life of cut spray carnation flowers as compared to control. The highest positive influence on vase life (with 13 days) was related to 2 mmol Put treatments. Result showed that applying Put and Spm treatments at 1 or 2 mmol concentration significantly minimized the percentage of mass loss compared to the control. A significant inhibition of anthocyanin degradation was observed with Put 1 or 2 mmol and Spm 1 mmol Significantly higher activities of catalase and DPPH radical scavenging activity were observed in petals when cut carnations were treated with 1 mmol Put. It can be concluded that application of polyamines such as putrescine can play a key role to prevent or delay deterioration in cut flowers.</p>

In order to investigate the effect of salicylic acid under salinity stress as an allelopathy stimulator in rice cultivars a hydroponic and pot experiment was carried out in factorial arrangement. Rice cultivars (Tarom and Neda) were grown under different levels of salinity stress (0, 4dS/m and 8dS/m) until 5 leaf stage, also at the same time the salicylic acid was used as foliar (0, 1% and 2%). The root exudates were collected and used as a growth bio-inhibitor in barnayardgrass pot culture. The highest inhibitory effects on chlorophyll, leaf area, root and nitrogen contents of barnyardgrass was obtain when the SA (%2) + EC (4dS/m) treatment was used (with 38%, 60%, 38% and 37.5% inhibition, respectively). Also, chlorophyll content was closely correlated with nitrogen content. Therefore, it may be possible to recommend that, the foliar application of SA 2% will be suitable for better stand of rice seedlings and more allelopathic potential on barnyardgrass in moderate saline conditions of paddies.

In order to investigate the effects of zinc and Azotobacter on maize production properties under different regime of urea as mineral fertilizer, an experiment was conducted at research field of Sari Agricultural Sciences and Natural Resources University during the cropping season of 2014. The nitrogen mineral fertilizer in 100, 200 and 300 amounts of kg urea ha -1 , Azotobacter (inoculation and non-inoculation) and foliar application of zinc (Zn1 = 1000 mg l -1 zinc sulfate, Zn2 = 500 mg l -1 zinc sulfate and Zn3 = 0 mg l -1 ) were considered as the applied treatments. Grain yield, biological yield (dry matter), and total protein content of each treatment were assessed. Results indicated that foliar applications of Zn had a significant effect on all studied traits. The highest grain yield was related to Zn1 treatment in each urea application and also between biological fertilizer treatments the highest yield was observed in inoculation treatment. Between all studied treatments the maximum grain yield (with 10.23 ton ha -1 ) was obtained through non-inoculation treatment × Zn1 for 300 kg urea ha -1 . The highest biological yield was observed in Zn1 + inoculation treatment. There were no significant differences between Azotobacter inoculation and non-inoculation for each level of zinc applications in 300 kg urea ha -1 treatment. Finally, it might be concluded that using of mineral fertilizer could be reduced by combining some management strategies in maize production.