Influence of Rice Residue Management Techniques on Physical Properties of Soil and Root Density of Wheat (Triticum Aestivum L.)
2010
Brar, Amandeep Singh | Walia, U S
An experiment was conducted at the Department of Agronomy, Punjab Agricultural University, Ludhiana (India) during rabi season of 2004–05 and 2005–06 with five rice residue management treatments i.e. no rice residue, surface application of rice residues @ 5, 6 and 7 t ha⁻¹ under zero till and incorporation of rice residues @ 5 t ha⁻¹ under zero till and incorporation of rice residues @ 5 t ha⁻¹ under conventional tillage. Treatments were replicated thrice. Lower bulk density (1.48 kg m⁻³ in 0.15 cm soil depth) and soil strength (9.86 deci MPa in 0–5 cm soil depth) were observed under rice residue incorporation treatment as compared to surface application of residue and no rice residue treatments. However, in the lower layers the trend was reverse and highest bulk density (1.66 kg m⁻³ in 30–60 cm soil depth) and soil strength (24.76 deci MPa in 30–35 cm soil depth) were observed under rice residue incorporaiton treatment. Cumulative water infiltration was up to 16.13 per cent higher under rice residue incorporation treatment than no rice residue treatment. In upper layers (0–30 cm) higher root density was recorded in rice residue incorporation treatment followed by surface application of rice residues @ 6, 7 and 5 t ha⁻¹ and rice residue removal treatment. In the deeper layers (30–90 cm) root density was higher under surface application of rice residue and no rice residue treatments as comared to incorporation treatment.
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