use of efficient methods of weed control with as regards environmental sustainability as well as increased crop yield and also weed resistance to herbicides is essential. in order to, an experiment was conducted in 2012 in the damavand jaban in iran. experiment treatments were compared in a split plot design by a randomized completely block design with 3 replication. the used variety of maize w...

â increase in wastage of soil resources in watershed is a persistent challenge that with increase in population and pressure on natural sources and unstable plantation on gradient farms and soils cause production reduces on farms, and also decrease in daily ratio of farms to population can cause more pressure on lands and natural resources.lavarefin watershed placed in 60 km from bandarabass in...

S . . . . . . . . . . . . . . . . . . . . . . . Mine Drainage abstracts, listed alphabetically by last name of first author. Page numbers are listed in Author Index at the back of this volume. AUTHOR INDEX . . . . . . . . . . . . . . . ,431433 A ac Bq bu cal cm cmol CPS "C d dS ft g gal P d P m h ha hL hp Hz in J K kcal kg kHz km kmt kN kPa kV L lb m M rnA me'l UNIT OF MEASURE ABBREVIATIONS USE...

• Quantity of annual carbon sequestration by terrestrial ecosystems can be measured at a reasonable accuracy; • Median measure of current NEP or sequestration by forested ecosystems is 3 metric tons per hectare per year; • Current calculated global TBCS for forests is ~3Gt C per yr; • Estimated future TBCS capacity is 200-250 Gt C using available knowledge and current technology and management ...

soil organic carbon is a key factor in productivity and quality of soil and environment particularly in semi arid regions. in this article, the role of farm soil organic matter management in soil and in land is discussed. the variability of soil organic carbon in drylands is mainly controlled by tillage and crop residue management. results of this study indicated that usage of correct tillage m...

elham ahmadi   agricultural zoology research department, iranian research institute of plant protection, tehran, iran       received: 16 november 2010 accepted: 21 april 2011     *corresponding author: email: [email protected]       abstract     one of the effective managing methods for slugs control is cultural method. a field study on the effect of different irrigation times on slug (agriol...