Conservation agriculture (CA) is characterized by three principles: minimum tillage, even the total absence of tillage in case direct seeding (NT), permanent soil cover mulch, and diversification crops. Its main objective to control degradation conserving physical biological properties fertility soil, which leads an improvement productivity, while preserving environment. Conventional (CT) used ...

BACKGROUND It has been suggested that anti-hypertensive medications may worsen leg ischemia in peripheral artery disease (PAD) patients. We undertook a meta-analysis to assess the effect of anti-hypertensive medications on measures of leg ischemia including maximum walking distance (MWD), pain free walking distance (PFWD) and ankle brachial pressure index (ABPI). A meta-regression was performed...

lack of sufficient information on conservation tillage systems leads to the dominating use of conventional tillage practice in most parts of iran. testing other management practices may help in decision making regarding the types of tillage systems that reduce soil deterioration. a three- years field experiment was conducted to study the effects of conventional (ct), reduced (rt) and no-till (n...

estimating fetal weight in utero, for better management of pregnancy and appropriate timing of delivery especially in high-risk pregnancies is necessary. our purpose to evaluate a simple method in estimating fetal weight in iranian pregnant patients and also to compare was with a previous western study. this study was carried out in arash hospital, tehran university of medical sciences in 1996-...

Inflammation is associated with increased sympathetic drive in cardiovascular diseases. Blood-borne proinflammatory cytokines, markers of inflammation, induce cyclooxygenase 2 (COX-2) activity in perivascular macrophages of the blood-brain barrier. COX-2 generates prostaglandin E(2), which may enter the brain and increase sympathetic nerve activity. We examined the contribution of this mechanis...

Biochar, as a carbon-rich material, may have notable influence on carbon balance, especially that in soil mediums. The oxidation of biochar modifies the biochar’s effects soil’s dynamics. To evaluate alteration storage, biochars derived from wheat straw (WS) and wood residues (WR) produced at 350, 450, 550 °C (marked BWS350, BWS450, BWS550, BWR350, BWR450, BWR550) were oxidized with hydrogen pe...

In the recent years horizontal drilling (HD) has become increasingly important in oil and gas exploration because it can increase the production per well and can effectively rework old and marginal vertical wells. The key element of successful HD is accurate navigation of the drill bit with advanced measurement-while-drilling (MWD) tools. The size of the MWD tools is not significantly restricte...

A 10-year-long field trial (between 2001 and 2010) was conducted to investigate the effect of paddy-upland rotation on rice yield, soil properties, and bacteria community diversity. Six types of paddy-upland crop rotations were evaluated: rice-fallow (control; CK), rice-rye grass (RR), rice-potato with rice straw mulches (RP), rice-rapeseed with straw incorporated into soil at flowering (ROF), ...

in other to evaluation of morphological and phenological traits of 24 populations, from four species chamomile of the genus of anthemis, an experiment were carried out using randomized completely blocks design (rcbd) in three replications in alborz research station in karaj, iran during 2011-12. 13 traits including: length and width of canopy diameter, plant height, number of flower, shoot fres...