Asian Journal of Research in Biology

A pot experiment was conducted at Experimental area, Agronomy Department PMAS- University of Arid Agriculture Rawalpindi to see the effect of Poultry Manure, Farm Yard Manure and NPK on the growth and physiological traits of NARC-21 Soybean Plant during March, 2022. Completely randomized designed was applied along with three replications. Seeds of NARC-21 Soybean were collected from NARC Islamabad. 10 seeds of NARC-21 Soybean were sown in each pot having 10 kg soil. Three plants were maintained in each pot. Organic (Poultry Manure and Farm Yard Manure) as well as inorganic fertilizers (NPK) played a significant role in the growth and physiology of soybean crop. NPK treatment is the best among other three treatments and attained the highest plant heights in three times (5.50, 11.75 and 26 cm) respectively. However, FYM results are approximately statistically at par with NPK. Inorganic fertilizer (NPK) gained the highest position number of leaves per plant in three times data (4, 12, 26) respectively. FYM data are comparable with NPK indicating delayed availability of nutrition to the plant system. NPK, poultry manure and FYM nutrition played a key role in the enhancement of leaf area values; however NPK nutrition had the top position (10.61 and 23.49) during two times respectively. Without nutrition minimum leaf area was observes in control treatment (3.0825 and 6.745) respectively in two times.  Nutrition played a key role in the growth as well as physiology of soybean crop. NPK treatment is the best option attaining the highest values of leaf area index (10.03 and 40.02) respectively in two times. Three nutrition treatments performed better than control i.e. without nutrition. NPK, FYM and poultry manure nutrition had statistically significant effect on crop growth rate of soybean plants, however direct and fast availability of nutrition through NPK treatment attained the highest value (0.1482) which was statically at par with FYM treatment.  NPK treatment had the top position in leaf area duration (357.52) but FYM and poultry manure values having minute difference with NPK and higher than control.  Three nutrition nutrients produced the highest values of net assimilation rate than control and NPK gained the highest value (8.12) which was statistically at par with FYM nutrition (6.25). NPK fertilizer is an inorganic fertilizer avails the nutrition the plant fastly than other two nutrition treatments and showed better performance.