Drying kinetics and quality characteristics of beetroot slices under hot air followed by microwave finish drying

  • Kulwinder K
  • A. K
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Abstract

Tests were conducted aimed at studying the combination of different uses of soil cultivated with white oats cv. IPR 126 during winter with different of nitrogen (N) fertilization managements in corn in succession. Oats management regimes included grazing with 10 or 20 cm of residue heights (G10 or G20); mechanically cut (for haymaking) with 10 or 20 cm of residue heights (C10 or C20); without grazing or cutting with tillage (ST); and without grazing or cutting with conventional (SC) soil preparation. Nitrogen management schemes included 100:0:0; 0:25:75; 0:50:50; 0:75:25; 0:100:0; and 0:50:50 (during pre-sowing and V4 and V8 growth stages). The experiment was conducted on Oxisol as a randomized block design in a layout of plots (soil regimes) with split plots (management of N) with three replications. The quantity and characteristics [concentrations of carbon (C) and N] of the straw deposited by oats as well as yield components and grain yield of corn were investigated. The ST and SC soil regimes provided greater deposition of straw with less concentration of N but greater concentration of C, with, consequently, a greater C:N ratio. Addition of C to soil was greater in soil regimes where the oats were not grazed or cut. The management of N did not affect the characteristics of the corn cultivation, and the foliar-N content and productivity were lower in soil regimes ST and SC. The corn had limited productivity when established in succession to white oats with straw higher than 4000 kg ha-1 and a C:N ratio more than 34. The use of white oats for grazing or cutting on 10- and 20-cm residue heights did not affect negatively the productivity of corn introduced in succession. Independent of the quantity and C:N ratio of straw in coverage, N management did not alter the foliar-N content, the characteristics of the plants, or the yield components and grain yield of corn. Key

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Kulwinder, K., & A., K. S. (2014). Drying kinetics and quality characteristics of beetroot slices under hot air followed by microwave finish drying. African Journal of Agricultural Research, 9(12), 1036ā€“1044. https://doi.org/10.5897/ajar2013.7759

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