Application of lime and N-P-K fertilizer for chilli on Rangsit soil series-very acid phase

ates of marl, by 8.29 cmol kg before experiment to 5.69, 2.39, 1.33 and 0.51 cmol kg as liming at the rate 0 3.1 6.2 and 9.3 t ha , respectively at the end of the experiment. Average maximum profit from 3 years by marling at the rate of 9.3 t ha with chemical fertilizer at the rate of 87.5-87.5-50 kg ha of N-P 2 O 5 -K 2 O was 66, 156 bahts ha which was not different from average profit from 3 years by marling at the rate of 3.1 t ha with chemical fertilizer at the rate of 50-62.5-25, 87.5-87.5-50 kg ha of N-P 2 O 5- K 2 O, which were 62,512 and 62,768 bahts ha , respectively. Regarding the application of chemical fertilizer alone, the average profit of about 24,868-24,875 and 30,056 bahts ha in the first the second and the third year, respectively, and it was also obtained. Hence those farmers who have the limited budget, may not apply marl they can also get some profit by using only chemical fertilizer. Keywords: liming, N-P-K fertilizers, Rangsit soi