In this study the effect of four levels of nitrogen fertilizer (0, 50, 100, 150) kg/ha and four levels of super phosphate triple (0, 50, 100, 150) kg/ha were investigated on Rubia Inctorum L. (madder) under salinity stress. A factorial experiment was carried out in a research farm in Roaddasht, Isfahan based on complete randomized blocks with three replications. The results of the variance anal...

An experiment was conducted in twelve 200-m2 earthen ponds at the Asian Institute of Technology, Thailand, for 91 days from 11 September to 11 December 1998. The experiment was designed to determine the optimal rate of nitrogen fertilization in cool season, to determine which of the nitrogen fertilization rates evaluated to produce Nile tilapia had the greatest profitability, and to develop a f...

To survey the effects of chemical and biological phosphorus on the yield and essential oil of Satureja hortensis L. as an important medicinal plant, factorial experiment was conducted based on randomized complete block design with three replicates at Research Station of Faculty of Agriculture, Urmia University in 2011. The treatments were chemical phosphorus fertilizer with four levels (0, 50, ...

Growth and production strains need to be capability tested in many different environmental conditions. The research aims obtain efficient against the use of phosphate fertilizer best dose TSP for growth soybean strains. study used two-factor Factorial Group Randomized Design (RAKF) method. first factor is with 3 levels, namely P1=25 kg/ha, P2=50 P3=75 kg/ha.The second Factor 5 treatments were o...

mixing herbicides is an essential for weed management strategy of reduce herbicide using and reducing the risk of side-effects and costs of herbicides. therefore, to study the effect of clopyralid and glyphosate and their mixtures on acroptylon repense control, a field trial was conducted as split plot based on a completely randomized block design with 35 treatments (as dose-response arrangemen...

In Agricultural practices pesticides are used for crop production and to produce high yield. But indiscriminate and excessive use of pesticides in agriculture leads to environmental pollution and in soil it is not degrading. A pesticide disturbs the activities of soil enzymes and soil micro biota. So we investigated in laboratory conditions that the effect of two insecticides, Thiodicarb (Dimet...