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Farming & Management

Deteravailable phosphorus status in soils for production of mining Brassica nigra L. and Sinapis alba L. in Vaishali region of Bihar 


DOI: 10.31830/2456-8724.2025.FM-171    | Article Id: FM-171 | Page : 109-114
Citation :- Deteravailable phosphorus status in soils for production of mining Brassica nigra L. and Sinapis alba L. in Vaishali region of Bihar. Farm. Manage. 10: 109-114
RINGU KUMARI AND SURENDRA KUMAR PD ringukumari@gmail.com
Address : Department of Botany, Patna University, Patna-800005, Bihar, India
Submitted Date : 5-09-2025
Accepted Date : 14-10-2025
Online Published:

Abstract

Phosphorus (P) deficiency is a major soil constraint influencing the growth and productivity of oilseed crops in the Indo-Gangetic plains. In the Vaishali region of Bihar, variable soil fertility and inconsistent phosphorus levels significantly affect yield performance and nutrient uptake efficiency. The present investigation was undertaken to evaluate the physicochemical properties of soil and their impact on the productivity of Brassica nigra (black mustard) and Sinapis alba (white mustard) across different agro-ecological blocks of Vaishali district. The research was conducted during 2024–2025 at the Department of Botany, R. P. S. College, Vaishali (Bihar, India), with the objective of correlating soil phosphorus availability with the yield attributes of mustard crops cultivated in six major blocks as Bidupur, Hajipur, Sahdai Buzurg, Mahnar, Desri, and Naubatpur. A randomized block design (RBD) with three replications was employed. Soil samples from each block were analyzed for pH, organic carbon, and available NPK contents. Field experiments were laid out using graded phosphorus levels (0, 25, 50, 75 and 100 kg P₂O₅/ha). Yield parameters such as seed weight, plant height, and chlorophyll content were measured, and data were statistically analyzed using ANOVA at p ≤ 0.05. Results revealed significant spatial variation in productivity. B. nigra recorded the highest seed weight in Bidupur Block (26.4 ± 4.2 mg/plant), followed by Naubatpur (19.2 ± 3.5 mg/plant) and Hajipur (13.8 ± 3.1 mg/plant). S. alba attained maximum seed weight in Bidupur (26.8 ± 4.5 mg/plant) and Hajipur (26.5 ± 3.9 mg/plant), with the lowest in Mahnar Block (3.0–5.5 mg/plant). These differences reflect the influence of phosphorus variability and adaptive efficiency between species. Brassica nigra demonstrated greater tolerance under low-phosphorus conditions, whereas Sinapis alba responded better to moderate phosphorus availability. Balanced P fertilization (≈ 75 kg P₂O₅/ha) is recommended for sustainable yield improvement in the Vaishali region.

Keywords

Brassica nigra phosphorus availability productivity Sinapis alba soil fertility 

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