introduction growth analysis has been widely used in breeding programs to identify the important plant developmental phases and components related to higher yield under a particular set of environmental conditions. castor bean (ricinus communis l.) is an important commercial crop. castor oil based by products is used in manufacturing of several commercially important commodities like surfactant...

Manipulation of stomatal density was investigated as a potential tool for enhancing drought tolerance or nutrient uptake. Drought tolerance and soil water retention were assessed using Arabidopsis epidermal patterning factor mutants manipulated to have increased or decreased stomatal density. Root nutrient uptake via mass flow was monitored under differing plant watering regimes using nitrogen-...

to evaluate the effect interference of mustard on yield and yield components of canola, and observation competition difference of mustard in pot and field condition, experiments were conducted in 2006 and 2007 in the greenhouse and farm of college of agriculture, ramin agricultural and natural resources university of khouzestan, respectively. pot experiment the factorial set of treatments was a...

We introduce a theoretical framework that predicts the optimum planting density and maximal yield for an annual crop plant. Two critical parameters determine the trajectory of plant growth and the optimal density, N(opt), where canopies of growing plants just come into contact, and competition: (i) maximal size at maturity, M(max), which differs among varieties due to artificial selection for d...

studies on floristic composition of weeds in an agricultural zone could help to reach a better weed control management strategies. the goal of this article was the study of the floristic composition of lentil weeds grown filds in khorramabad, during 2007-2008. sampling was done on 9 point of each field according to w method in 21farm. in each plat per plate of all weed species were counted sepa...

The effects of density on the vital rates of the modular seaweed Ascophyllum nodosum (L.) Le Jol. were investigated in 2 areas of the northern Atlantic Ocean: the Isle of Man, in the Irish Sea, and Tjärnö, on the Swedish west coast. The densities of plants (genets) were manipulated in the field. The impact of density on survival, growth and reproduction of plants >2 cm was estimated over 1 yr. ...

abstract petroleum pollution is one of the most common and dangerous pollutions that is due to petroleum industries such as refineries, and consequently of oil pipes and tanks leak causing environmental pollutions. one of the newest born technologies in this area is phytoremediation, in which plants are used for decreasing of petroleum pollution. this technology is used for remediation of soil,...