Baghestani, M. AS., and. Zand. 2003. Review of the biology and control of wild mustard (Sinapis arvensis L.). Research Institute of pests and plant diseases. Page 56. (In Persian).
Bayat, M., B. Rabie, M. Rabie, and A. Believers. 2008. Relationships between yield and agronomic traits in rapeseed as paddy cultivation. Journal of Agricultural Sciences and Natural Resources. No. 45. (In Persian).
Colnenne, C., J.M. Meynard, R. Reau, E. Justes, and A. Merrien. 1998. Determination of a Critical Nitrogen Dilution Curve for Winter Oilseed Rape. Annals of Botany. 81: 311-317.
Daheshshahraki, A., A. Kashani, M., Mesgarbashy, M. nabipour and M. kohi dehkourdi. 2008. Effect density and time consuming of nitrogen on some properties of canola. Journal of Research and Development in Agriculture and Horticulture. Number 79. Pp. 17-11. (In Persian).
Daneshmand, A., A.H. Shiranirad, GH. Nourmohammadi, GH. Zarei and J. Daneshian. 2006. Effects of water stress and different values of nitrogen fertilizer on grain yield, yield components, nitrogen uptake and nitrogen and water use efficiency in two cultivars of canola. Iranian Journal of Crop Science. No. 8. Pp. 342-323. (In Persian).
Daneshvarrad, Z., M. Esfahani, M.H. Peyman, M. Rabieei, and H. Sameizadeh. 2008. Effect of tillage methods on yield, yield components and some of specifications of growth in canola grown in paddy fields. Journal of Agricultural Sciences and Natural Resources. Year 12. No. 46. (In Persian).
Faraji, A. 2004. Effect of row spacing and seed rate on yield and yield components of rapeseed (quantum cultivars) in the Gonbad, Seed and Plant Journal. Volume 20. No. 3. (In Persian).
Fathi, G. 2008. Reaction of canola cultivars yield to different plant densities. Iranian Journal of Crop Science. Volume 39. Number 1. Pp. 10-1. (In Persian).
Foladivanda, S.A., A. Ayneband, and F. Alahnazoki. 2010. Evaluation of different tillage methods and seed rate on yield of canola under dry land conditions. Iranian Agricultural Research magazine. Volume 8. No. 2. Pp. 224-213. (In Persian).
Gislum, R., B. Boelt. 2009. Validity of accessible critical nitrogen dilution curves in perennial ryegrass for seed production. Field Crops Research. 111 152-156.
Greenwood, D.J., G. Lemaire, G. Gosse, P. Cruz, A. Draycott, and J.J. Neeteson. 1990. Decline in percentage N of C3 and C4 crops with increasing plant mass. Ann. Bot. 66: 425- 436.
Hajilari, A. 2005. Canola, planting, Conservation and harvesting. Department of Agriculture of Agriculture Organization of Golestan province. (In Persian).
Justes, E., M.H. Jeuffroy, and B. Mary. 1997. Wheat, barley and durum wheat. In: Lemaire G, ed. Diagnosis of the nitrogen status in crops. Berlin Heidelberg. 73-89.
Lemaire, G., and F. Gastal. 1997. N uptake and distribution in plant canopies. In: Lemaire, G. (Ed.). Diagnosis of Nitrogen status in Crops. Springer-Verlag, Berlin. Pp: 3-41.
Lemaire, G., and J. Salette. 1984. Relation entre dynamique de croissance et dynamique de prelevement dazote pour un peuplement de gramine. es fourrage' res I. Etude de l'effet du milieu. Agronomie 4: 423-430.
Lemaire, G., and M. Chartier. 1992. Relationships between growth dynamics and nitrogen uptake for individual sorgum plants growing at different plant densities. In: Proceeding of the 2nd ESA congress. Warwick University. England. 98-99.
Lemaire, G., B. Onillon, G. Gosse, M. Chartier, and J.M. Allirand. 1991. Nitrogen distribution within s lucerne canopy during regrowth: Relation with light distribution. annoals of Bonaty 68: 483-489.
Lemaire, G., E. Van Oosterom, J.E. Sheehy, M.H. Jeuffroy, A.Massignam, and L. Rossato. 2007. Is crop N demand more closely related to drymatter accumulation or leaf area expansion during vegetative growth? Field Crops Research. 100: 91–106.
Lemaire, G., M. Jeuffroy, and F. Gastal. 2008. Diagnosis tool for plant and crop N status in vegetative stage Theory and practices for crop N management. Europ. J. Agronomy. 28: 614–624.
Liyong, H., C. Hao, Z. Guangsheng, and F. Tingdong. 2007. The influence of drought on (Brassica napus L.) development under different nitrogenous level. 235-236. Proceeding of the 12th International Rapeseed Congress Sustainable Development in Cruciferous Oilseed Crops Production. 26-30 March Wuhan, China. Science Press USA Inc.
Malekahmadi, H., H. Alizadeh, N. Majnonhosseini and A.H. Shiranirad. 2009. Effect of plant density and nitrogen fertilizer on winter rapeseed yield and some morphological characters (Brassica napus L.). Iranian Journal of Crop Science. Volume 40. (4). Pp. 182-173. (In Persian).
Millsa, A., D.J. Moot, P.D. Jamieson. 2009. Quantifying the effect of nitrogen on productivity of cocksfoot (Dactylis glomerata L.) pastures. Europ. J. Agronomy 30: 63–69.
Nordestgaard, A. 1992. Split nitrogen application in perennial rye grass (Lolium perenne L.) for seed production. SP beretning. 163–168 .
Rossato, L., P. Laine, and A. Qurry. 2001. Nitrogen storage and remobilization in (Brassica napus L.) during the growth cycle: nitrogen fluxes within the plant and changes in soluble protein patterns. J. Exp. Bot. 52: 1655-1663.
Safahani, A.R., A. Zand, N. Baqrani, and M. Bagheri. 2007. The effect of growth indexes on the competitive ability of canola (Brassica napus L.) with wild mustard (Sinapis arvensis L.). Iranian Agricultural Research magazine. Volume 5. No. 2. Pp. 313-301. (In Persian).
Shabani, A., A.A. Kamkarhagig, A. Spaskhah, Y. Imam, and T. Honar. 2009. Effects of water stress on physiological characteristics of canola. Journal of Agricultural Sciences and Natural Resources. Year 13. Number 49. Pp. 42-31. (In Persian).
Shiresmaeili, G.H. and M. Haiderisultanabad. 2009. Effect of tillage systems and seeding rate on machine parameters and yield of canola. Iranian Journal of Crop Science. Volume 11. No. 3. (In Persian).
Soleymanzadeh H., S. Latifi and A. Soltani. 2007. Relationship between phenology and physiological traits with grain yield in different cultivars of rapeseed (Brassica napus L.) under dry land conditions. Journal of Agricultural Sciences and Natural Resources. Volume 14. No. 5. (In Persian).
Tei , F., P. Benincasa, and M. Guiducci. 2002. Critical nitrogen concentration in processing tomato. Europ. J. Agronomy. 18 45-55.
Ulrich, A. 1952. Physiological bases for assessing the nutritional requirements of plants. Annu. (review). Plant Physiol. 3: 207–228.
Zangani, A., A. Kashani, G.A. Fathi and M. Mesgarbashi. 2006. Scrutiny effect and efficiency different levels nitrogen on qualitative and quantitative yield and yield components in two rapeseed cultivars in Ahvaz. Journal of Agricultural Sciences, Iran. Volume 37. Number 1. Pp. 45-39. (In Persian).
Zeinali, A., A. Soltani, S.A. Galeshi, and A. Movahedinaini. Unpublished. Evaluation of nitrogen nutrition index of wheat in Gorgan. (In Persian).