Showing 2 results for A. Ghasemi
L. Mosharaf, A. Ghasemi,
Volume 8, Issue 2 (summer 2004)
Abstract
In this study the effects of four quince harvesting times (at 10 - day intervals), in 2 years on fruit quality during cold storage for 5 months at 0˚C and 85% Relative Humidity were investigated. Fruits were picked from orchards in Flavargan region of Isfahan. Every month, pH, sugar content, acidity, TSS, tissue firmness of fruits were determined. Variance analysis shows that the effect of year on TSS, sugar content, and pectin was siginificant (α =1%) as well as on tissue firmness (α =5%). Harvesting time effect was only significanrt on sugar content while storage time showed a significant effect on TSS, Sugar content and acidity of fruits. Year and harvesting time interaction effect on sugar content and TSS was significant ( α=1%). Year and storage time interaction effect on pH, pectin and tissue firmness was significant while no significant effect on measured parameter was observed for harvesting time and storage time interaction. Simultaneous effect of year, Storage time and harvesting time on pH, pectin and tissue firmness was significant ( α=1%). Meanwhile average analysis by Duncan test showed that different harvesting times had no significant effect on measured parameters except on fruit sugar content. Acidty , pH., and TSS values were changing significantly durig storage. Sugar content of 4th and 5th months of storage was maximum. Pectin content, acidity and tissue firmness showed the maximum level at the first harvesting time while pH was maximum at the 2nd harvesting time. It was concluded that 4th harvesting time (181 days after flowering period) and 5 months of cold storage are the optimum conditions to keep the quality quince.
S. A. Ghasemi , Sh. Danesh,
Volume 16, Issue 61 (fall 2012)
Abstract
In this research, the quality of the effluent from the City of Mashhad wastewater treatment plants was evaluated based on Ayers and Westcot irrigation water quality guideline, and the potential impacts of these effluents on soil and plants were assessed. For this purpose, the effluent from each of the three existing wastewater treatment plants was sampled on a regular basis, for a period of one year, and their parameters of importance in regard to the agricultural use such as pH, electrical conductivity (EC), concentrations of Sodium, Calcium, Magnesium, Chloride, Boron, Nitrate (NO3-N), bicarbonate and heavy metals were measured. Based on the obtained results, the agricultural use of the effluents from the wastewater treatment plants has severe restriction in regard to the bicarbonate concentrations (8-12.1 meq/L). Also, in view points of parameters such as EC (1250-1874 µS/cm), Sodium (5.8-8.7 as SAR), Chloride (3.2-6.5 meq/L) and adj RNa (7.8-11.7), the effluents were categorized in the class of waters with low to moderate restrictions. However, the measured values of pH (7.3-8), Boron (0.2-0.8 mg/L), Nitrate Nitrogen (0.5-4.2 mg/L) and heavy metals did not indicate any restrictions for agricultural use. From the results of this research, it can be concluded that the use of effluent as irrigation water requires careful planning, monitoring and management strategies.
