Vol 63, No. 9;Sep 2013 106 Jokull Journal Growth Promotion and Biochemical Activities of Capsicum annum using 1 Azospirillum brasilense under Deficit Fertigation 2 Mohd Fauzihan, K 1 , A’fifah, A. R. 1 , Razi, M. I. 1* , Radziah, O. 1 , Halimi, M. S. 2 , 3 Zulkarami, B. 1 , Naher, U.A. 1,3 and Panhwar, Q.A. 4 4 1 Institute of Tropical Agriculture, Universiti Putra Malaysia, 43400 UPM Serdang, 5 Selangor, Malaysia. 6 2 Department of Agriculture Technology, Faculty of Agriculture, Universiti Putra 7 Malaysia, 43400 UPM Serdang, Selangor, Malaysia. 8 3 Bangladesh Rice Research Institute, Gazipur 1701, Bangladesh 9 4 Department of Land Mangement, Faculty of Agriculture, Universiti Putra Malaysia, 10 43400 UPM Serdang, Selangor, Malaysia. 11 * Corresponding author: razi@upm.edu.my 12 13 ABSTRACT: 14 The study was conducted under rain shelter condition at Universiti Putra Malaysia to 15 evaluate the effect of Azospirillum brasilense Sp7 inoculation on chili plants grown in 16 coconut coir dust media (with and without compost) and moderate (40 %) water 17 deficient condition. Five treatments were tried; Inoculated compost and full irrigation 18 (T 1 ), inoculated compost and moderate irrigation (T 2 ), non-inoculated compost and full 19 irrigation (T 3 ), non-inoculated compost and moderate irrigation (T 4 ), control (non- 20 inoculated and full irrigation). Inoculation increased plant biomass, fruit yield (580 g 21 plant -1 ) and improved nutrient element uptake in both full and moderate irrigation 22