water shortage is the most important factors on crop production in the world. several methods of deficit irrigation are solutions for reduction of irrigation water. to understand the effects of conventional deficit irrigation and partial root zone drying treatments on yield, yield components and water use efficiency of sunflower (farrokh cultivar), one study was carried out. the research was co...

The Mandelbrot set is arguably one of the most beautiful sets in mathematics. In 1991, Dave Boll discovered a surprising occurrence of the number π while exploring a seemingly unrelated property of the Mandelbrot set. Boll’s Þnding is easy to describe and understand, and yet it is not widely known — possibly because the result has not been rigorously shown. The purpose of this paper is to prese...

this study was conducted to evaluate the impact of deficit irrigation and growth stages on yield and yield components of potatoes and water use efficiency. a field experiment was conducted at shahrekord agricultural research station over three years of crop seasons using a randomized complete block design with three replications. plots were assigned to five levels of deficit irrigation treatmen...

Understanding the critical host plant factors that determine oviposition behavior and survival of boll weevil, Anthonomus grandis grandis Boheman, on cotton, Gossypium hirsutum L., is important for developing successful pest management strategies. However, published information is both conßicting and limited regarding how different cotton fruit sizes affect boll weevil oviposition choices and s...

Abstract Declining water levels in the southern Ogallala Aquifer and associated reduction irrigation capacities increasing pumping costs necessitate adoption of deficit/limited practices for sustaining cotton production Texas High Plains (THP) region. The overall goal this study was to evaluate response crop stress different growth stages suggest efficient growth-stage-based deficit (GSBD) sche...

A split plot factorial experiment in RCBD with 3 replications was performed in 2012-2013. Three sesame cultivars namely Biarjomand native, Dashtestan 2, and Darab 1 in the main plot were subjected to drought stress at different growth stages, i.e., control (full irrigation), withdrawing irrigation at 69 BBCH (end of flowering stage) and withdrawing irrigation at 79 BBCH (fully grown fruits). Tw...

The photosynthetic performance of the canopy boll-leaf system (BLS) reflects material and energy exchange abilities between plant external environment. A two-year field experiment determined response to irrigation regimes [600 (W1), 480 (W2), 360 (W3) m3 ha-1] cotton BLS physio-biochemical traits. Decreasing irrigation, photochemical quenching coefficient, electron transfer rate PSII, chlorophy...