: Status And Response Of Boron To Lentil [Lens Esculenta ]Rainfed Acidic Upland Soils of Ranchi

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Date
2006
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Birsa Agricultural University, Ranchi
Abstract
An attempt was made to delineate extent of soil acidity, status of organic carbon and available nutrients in typical rainfed uplands of Ratu and Khijari blocks of Ranchi district. Altogether, 50 surface soil samples (0-0.15) were collected from farmer’s field in the cluster of each five villages of Khijari block viz, Bargawa, Tikra- Toli, Tonka-Toli and saparom and five villages of khijari Block viz, Bargawa, Bara- Kauali, Ghaghra- bassti, chhota –kauali and Khijari- basti. A filed experiment was conducted with lentil BR-25 during Rabi season of 2005-2006 at experimental area of the department of Soil Science and agricultural chemistry to study the effect of boron application under limed and unlimed condition on crop yield, nutrients content (N.P.S and B), nutrient uptake (N,P,S and B), protein content and protein yield of lentil crop. Analyses of the upland of the farmer’s field reveal that soil were acidic in reaction (pH4.0 to 6.2), poor in organic carbon content (2.1 to 5.3g kg-1), and coarse in texture (50.8 to 51.8%) sand, 25.2 to26.1% silt% and 22.4 to 23.0% clay). Available nutrients in these farmer’s field soil ranged from 68.0 to 238.6 Kg N ha-1 and 0.20 to.46 mg B Kg-1. The magnitude of nutrients level in these soils are rated to be more than 80 percent soil samples low in organic carbon content and low in plant available nutrients status (N,P,K, S, and B). Soil available S and B indicated positive correlation ships with organic carbon and clay content in upland of both Ratu and Khijari Blocks of Ranchi District. Results of the field experiment indicated that response of boron application to lentil was evident at 0.5Kg B ha-1 under limed condition and at 1.0Kg B ha_1 under unlimed condition , Further increase in the B levels crop yield decreased linearly under both limed and unlimed condition. Content of nutrient ( N, P, S and B) increased significant with increasing in levels of B application in both limed and unlimed soil. However, total uptake of these nutrients was evident up to 1.kg B ha-1 application. The content and uptake of these nutrients by crop was more in limed as compared to unlimed soils, protein content and protein yield of crop were also affected considerable with boron and liming. An additional net profit of Rs. 4976/- was obtained with 0.5 kg B ha-1 along with RDF and 250 kg ha-1 lime application. Liming to rainfed upland soils increased availability of N.p.K.S. and B after crop harvest in the experimental plot. .
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