TY - JOUR T1 - Evaluation the Effect of Water Quality and Soil Nitrogen Content on Glyphosate Efficacy on Common Lambsquart(Chenopodium album L.) control TT - ارزیابی تأثیر کیفیت آب و محتوای نیتروژن خاک بر کارایی علف‌کش گلیفوسیت در کنترل علف هرز سلمه تره (Chenopodium album L.) JF - JCPP JO - JCPP VL - 4 IS - 11 UR - http://jcpp.iut.ac.ir/article-1-2044-en.html Y1 - 2014 SP - 27 EP - 39 KW - Calcium carbonate KW - Dry mater KW - Herbicide KW - Water hardness. N2 - In order to study the effect of soil nitrogen content and water hardness on glyphosate efficacy on common lambsquart control, an experiment was carried out as a completely randomized design in a factorial arrangement with three replications in 2011 at the College of Agriculture, Ferdowsi University of Mashhad. Experimental treatments were included soil nitrogen content at 5 levels (0, 50, 90, 200 and 300 mg/kg soil), glyphosate doses at 7 levels (0, 75, 100, 125, 150, 175 and 200 % dose guideline glyphosate for common lambsquart), calcium carbonate concentration in water as index of water hardness at 5 levels ( 0, 100, 300, 600 and 1200 ppm). Spray was done at 8-10 common lambsquart leaf stage. 30 days after glyphosate spray, plants survival and shoot dry matter was measured. Results showed, herbicide rate, soil nitrogen content and water hardness had significantly affect (P M3 ER -