Effect of Previous Crop Roots on Soil Compaction in 2 Yr Rotations under a No-Tillage System
نویسندگان
چکیده
Compacted soils affect global crop productivity and environmental quality. A field study was conducted from 2014 to 2020 in the northern Great Plains, USA, evaluate effect of various rooting systems on soil compaction 2 yr rotations camelina (Camelina sativa L.), carinata (Brassica A.) a cover mix planted place fallow with durum (Triticum D.). The designed as randomized complete block three replications no-tillage system. classified Dooley sandy loam (fine-loamy, mixed, superactive, frigid Typic Argiustolls) derived glacial till parent material. Three measurements penetration resistance (PR) were taken penetrometer depth 0–30 cm within each plot. Soil moisture contents determined using TDR sensor at time PR measurements. Both monitored prior planting spring after harvest. Initial results showed that all plots had an average 2.244 MPa between 8–20 depth, due history tillage wheel traffic caused by activities. Covariance analysis indicated not significantly affected type content. After one cycle rotation, 2016 compacted layer existed same initial depths. However, two cycles, values reduced 1.480, 1.812, 1.775, 1.645 2018 1.568, 1.581, 1.476, 1.458 under camelina, carinata, mix, treatments, respectively. These findings indicate previous roots could effectively improve penetrating layer, decompose over form voids root channels. Although these are novel significant, further research is needed different crops support our making any conclusion.
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ژورنال
عنوان ژورنال: Land
سال: 2021
ISSN: ['2073-445X']
DOI: https://doi.org/10.3390/land10020202