paraquat herbicide weed control efficacy in stale seedbed practices was evaluated by split plots arrangement according to a randomized complete block design with three replications in lorestan province during 2009 and 2010. the common bean seed rate (in three levels: 100, 150 and 200 kg.ha-1) and weed management in seven levels (1. trifluralin ppi; 2. paraquat pre; 3. bentazon+acifluorfen post;...

crop rotation affect on crop nitrogen uptake and nitrogen use efficiency (nue). crop rotations with high nue decrease energy use and increase level of sustainability in agro ecosystems. the objectives of this research were to determine the suitable double cropping system for enhancing nue and evaluate the effects of crop rotation, n fertilizer rate and return of crop residue on nue. this study ...

Highlight: Two tallgrass prairie areas burned annually for 20 (grazed) nnd 48 (un. grazed) years ar different fimeS showed differences in soil chemical and physical properties. Winter, early-spring, and mid-spring burned ungrared plots were generally higher in soil pH, organic ma~fer, and K than late-spring burned or unburned plots. Late-Jpring and winter burning lowered soil N on ungrazed and ...

in order to study the effects of different nutrition systems (organic, chemical and integrated) and biofertilizer (pgpr) on phenology period, grain yield and its component in sunflower (helianthus annuus l.) an experiment was conducted using alestar cultivar at the research farm of college of agriculture, tarbiat modares university in 2007. five levels of nutrition systems including f1 (100% or...

The use of sex pheromones as an option to control wireworms via mass trapping and the biology of Agriotes lineatus (L.) were investigated in a long-term field experiment at an organic research farm in North Rhine-Westphalia, Germany. Plots supplied with sex pheromone traps were compared with untreated control plots. Over 5 years, a total of 12,378 male adults of A. lineatus, Agriotes obscurus (...

in this study, the effects of weed control treatments and plant density on lentil (lens culinaris) yield and yield components as well as weed control efficacy were investigated. the study was conducted according to a split-plot arrangement based on randomized completely block design in three replicates in karaj in 2007-2008. the weed control chemical treatments in four levels (trifluralin herbi...

The experiment was conducted at Sher-e-Bangla Agricultural University farm, Dhaka, Bangladesh during the period from March to June 2007 with seven treatments viz; T1: Hand picking of infested fruits of bitter gourd at 7 days interval; T2: Neem seed kernel at 5 gm/l of water at 5 days interval +T1; T3: Spray of shobicron 425EC @ 2ml/l of water at 7 days interval + T1; T4: Micronutrient-Zn @ 6.72...

Effect of several soil fumigants on plant-parasitic nematodes, weeds, and snapdragon ( Antirrhinum majus L.) production were evaluated in a commercial site in southeast Florida in 2002-03. Treatments consisted of methyl bromide (98%) + chloropicrin (2%), metam sodium, metam sodium + chloropicrin, and a nontreated control. All fumigant treatments reduced (P < 0.05) weed populations compared to t...