Vol. 10, Issue 10 (2021)

Author(s):
Lalduhawmi Fanai, Arun Alfred David, Tarence Thomas, Narendra Swaroop and Amreen Hassan

Abstract:
The field experiment was conducted to study the effect of different levels of Sulphur and Potassium on the properties of the soil as well as on the growth and yield of Onion (Allium cepa L.) at the Research Farm of Soil Science, SHUATS, Prayagraj, India, during the winter season of 2020-21. Experimental layout was done in a Factorial Randomised Block Design (RBD) with 9 treatments which is replicated 3 times. Treatments consists of three levels of Potassium i.e. 0, 25 and 50 kg ha^-1 and three levels of Sulphur i.e. 0, 15, 30 kg ha^-1 where the treatments are assigned randomly. The results indicated that the maximum average plant height (64.02 cm), bulb length (4.99 cm), bulb diameter (6.99 cm), total bulb yield (13.72 q ha^-1) showed significantly better results with the treatment T₉ (Potassium at 50kg ha^-1 and Sulphur at 30 kg ha^-1). The same treatment also showed better results in the physical properties of the post-harvest quality of the soil like increase in% pore space, decrease in bulk and particle density of the soil and also showed a gradual increase on the chemical properties of the soil like increase in pH, OC% and N, P, K, S values in the soil after harvest. Hence the results revealed that the treatment combination i.e. Potassium at 50 kg ha^-1 and Sulphur at 30 kg ha^-1 was found to be the most beneficial and significantly improved the growth parameters and bulb yield of onion grown under Prayagraj agromatic conditions.