in order to investigate biodiversity of industrial crop in iran, an investigation was made based on the statistical data available on acreage and production of this crop in the country. cultivated area of industrial crop from 29 provinces were analyzed and shannon biodiversity index was calculated. the highest biodiversity index compare to the total crop species was observed in golestan, semnan...

Tajikistan is a hotspot of plant and animal species diversity and endemism andis important for the conservation of biodiversity on a global scale. The country is located ata biological crossroads. Species from Central and Northern Europe, Central Asia, theMiddle East, and North Africa mingle here with endemics found nowhere else. Therichness of Tajikistan‘s biodiversity shows up at the genetic,...

tajikistan is a hotspot of plant and animal species diversity and endemism andis important for the conservation of biodiversity on a global scale. the country is located ata biological crossroads. species from central and northern europe, central asia, themiddle east, and north africa mingle here with endemics found nowhere else. therichness of tajikistan‘s biodiversity shows up at the genetic,...

abstract improving nitrogen use efficiency (nue) is an important objective of the agroecosystem management. a field experiment was conducted to study the effect of different competition patterns on nitrogen balance in the wheat agroecosystem. experimental design was split–plot based on randomized complete blocks with four replications. the main plots consisted of different nitrogen rates (i.e. ...

to study the effect of strip intercropping pattern with cowpea and soybean on sorghum fodder yield an experiment was conducted at research farm of university of tehran (karaj) during 2005. the experiment was arranged in a randomized complete block design of four replications. the plant proportions included pure culture of sorghum (sss); cowpea (ccc) and soybean (ggg) each in 12 rows; vs differe...