abstract water is the most common carier used to dilute herbicides and their application. researches had shown that water quality is an important factor in some herbicide efficacy. in order to study the effect of water hardness on 2,4-d efficacy, an experiment was carried out under controlled conditions in 2010 at the college of agriculture, ferdowsi university of mashhad. experimental treatmen...

ABSTRACT- In the past few decades, accumulation of heavy metals, such as lead (Pb), in soils has increased as a result of human activities.The environmental hazard associated with soil enrichment in heavy metals is related to their mobility and plant availability. Application of various materials such as humic may influence the amount of Pb taken up by plant. Four levels of each of liquid and s...

abstract the critical period of weed control (cpwc) is a period in the crop growth cycle during which weeds must be controlled to prevent yield losses. in order to determine the critical period of weed control (cpwc) of corn in hamedan, an experiment was conducted in 2007 at agricultural research station of bu-ali sina university of hamedan. the experiment was carried out as a randomized comple...

ARTICLE INFO ABSTRACTIn the past few decades, accumulation of heavy metals, such as lead (Pb), in soils has increased as a result of human activities.The environmental hazard associated with soil enrichment in heavy metals is related to their mobility and plant availability. Application of various materials such as humic may influence the amount of Pb taken up by plant. Four levels of each of l...

according to the contradictory reports of researchers, tillers may have positive or negative effect on wheat yield. thus, this study was conducted to investigate the role of tillers on wheat yield under two row spacing of 12.5 and 25 cm and four plant densities of 125, 250, 375 and 500 plants per m2, at gorgan university of agricultural sciences and natural resources farm in anbare-ololum reign...

Growth trial of thirteen weeks’ duration was carried out on 24 pigs (2 months age; 12.5 kg b. wt.) which were divided into four groups of 6 pigs each and were fed with control diet concentrated feed mixture (CFM) (T0), CFM plus polyherbal superliv (500 g/ton) (T1), CFM plus polyherbal Ruchamax (500g/ton) (T2) and CFM plus AV/AGP/10 polyherbal (500g/ton) (T3). The dry mater intake (DMI) (g/d) in...

in order to investigate the effect of insufficient irrigation on remobilization percent and plant dry mater in three spring safflower (cartamus tinctorius l.) genotypes, a field experiment was conducted at research farm, faculty of agriculture, the university of birjand, iran, during 2008-2009, as a spilt plot arrangement based on randomized complete block design with four replications. irrigat...

To examine the genetic variation for drought stress in chamomile, eight accessions belonging to four species were evaluated under both field and greenhouse conditions using normal and late season drought stress. In the field experiment drought stress were initiated with irrigation cease at the commencement of flowering time. In greenhouse experiment, irrigation carried out at flower initiation ...