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  • noun

Synonyms for subsoil

the layer of soil between the topsoil and bedrock


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In the presence of subsoiling, the seed treatments [T.sub.1] (imidacloprid + thiodicarb) and [T.sub.2] (thiamethoxam) did not differ from [T.sub.4] (fipronil + pyraclostrobin + thiophanate methyl) and conditioned higher rice yields than the treatments [T.sub.3] (carbofuran) and [T.sub.0] (Table 2).
Considering each seed treatment, the treatments of subsoiling did not affect rice yield significantly.
(2012), on the other hand, observed that subsoiling and sporadic chiseling in soils under no-tillage system did not interfere with plant development or corn yield.
RP increased with soil depth and reached values from 2,755 to 3,460 kPa in the experiment with subsoiling and higher values, from 3,674 to 4,108 kPa, in the experiment without subsoiling (Figures 2A and 2B), agreeing with Cunha et al.
About 2 weeks later SS was performed by a subsoiling fertilization machine (1ST-4
Table 2: Effects of subsoiling on soil water storage in the 0-300 cm depth in fallow period of dry-land wheat
SWS at the soil depth of 0300 cm were tested in the fields with or without subsoiling treatment (Table 2).
As the concentration of N increased the SWS declined in plots under subsoiling treatment at the over-wintering jointing booting and anthesis stages of dry-land wheat while similar pattern was observed in the non-tilled fields at the over-wintering jointing and booting stages (Table 3).
The experiment included three tillage treatments: (i) NT after wheat harvest in year 1, subsoiling after wheat harvest in year 2, and NT after wheat harvest in year 3 (NT/ST/NT); (ii) subsoiling after wheat harvest in year 1, NT after wheat harvest in year 2, and subsoiling after wheat harvest in year 3 (ST/NT/ST); (iii) conventional tillage for years l-3 (CT).
Subsoiling used a subsoiling chisel point with adjustable wings that was designed at China Agricultural University in 1992.
Previous studies suggested that the degree of rainfall infiltration and soil water evaporation differed according to the degree and depth of soil disturbance under NT, subsoiling, and CT treatments, and that the soil water-holding capacity differed with tillage practices (Huang et al.
Summary of benefits attributed to soil loosening in Australia Intervention technique Primary benefit Subsoiling Five commercial subsoilers differing shank, coulter, tine, and wing configurations.
During this period, the plots had developed very different surface residue and soil organic matter characteristics in the top 100 mm of the soil profile, but the subsoils were similar, having been uniformly managed with in-row subsoiling throughout the previous 18 yr (Karlen et al., 1996; Hunt et al., 1996, 1997).
The subplots comprised different subsurface tillage regimes (no subsoiling vs.
Whole profile soil strength mean values were lower for the treatment with paraplow subsoiling (Table 2).