Effect of graded doses of Boron and grey water on soil properties and yield of tomato in calcareous soils of Bihar
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Date
2020
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DRPCAU, Pusa
Abstract
The present investigation was carried out as a part of ongoing experiment under AICRP on IWM Project, during Rabi, 2018-19 at Mansor chawania area of RPCAU, Pusa, Bihar. The experiment was designed in Split Plot Design (SPD) which includes three main plots and four sub-plots, replicated three times. Main plots receiving irrigation levels (I1, I2, I3) of 100% Fresh water, 50% Fresh water + 50% Grey water and 100% Grey water respectively and subplots receiving Boron levels (B1, B2, B3, B4) of 0.0, 0.5, 1.0 ,1.5 kg ha⁻¹respectively as Boric acid. Tomato crops were grown as test crop with recommended doses of fertilizer viz. 120:80:80 kg ha⁻¹ of N: P2O5:K2O applied as Urea, DAP and MOP, respectively. The current trial was conducted to investigate the effect of grey water in combination with graded doses of B on soil and response of tomato crop in calcareous soils of Bihar. Based on the results, it was noticed that 100 % (I3) grey water application enhanced overall concentration of micro and macronutrients in post-harvest soil. However, the nutrient status of the post-harvest soils viz. Na, N, K, org. carbon, B, S, Zn & Fe increased by 149.84%, 34.23%, 17.60%, 7.54%, 41.61%, 7.80%, 22.50%, 11.13% respectively over control. Therefore, application of 50 % grey water and 50 % fresh water combining with Boron @ 1.0 kg ha⁻¹ emerged as the best amongst all the treatments and produced better response to tomato crop in respect of yield as
well as uptake in B deficient calcareous soil. Hence, in the short term, the grey water used in this analysis does not allow salts and trace metal cations to accumulate in soil.