| dust accumulation and leaf pigment content in vegetation near the national highway at sambalpur, orissa, india. | an investigation on the seasonal variation in dust accumulation on leaves and leaf pigment content of six plant species of mixed habits was carried out at the side of the national highway (nh 6) at sambalpur, orissa, india. the plants selected for study were pongamia pinnata, tabernaemontana divaricata, ipomea carnea, ficus relogiosa, ficus benghalensis, and quisqualis indica. the observed trend of dust accumulation was in the order t. divaricata>i. carnea>p. pinnata>f. religiosa>f. benghalensis ... | 2005 | 15546639 |