Nitrogen requirements associated with improved conservation tillage for corn production

Langdale, G. W.; Box, J. E.; Plank, C. O.; Fleming, W. G.

doi:10.1080/00103628109367224

Cited by 7 publications

(1 citation statement)

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“…Taylor and Bruce (1968) found that subsoiling soils in Alabama resulted in increased cotton yields at two locations, did not affect yields at four locations, and decreased yields at the remaining two locations. Langdale et al (1981) reported an improvement in corn ( Zea mays L.) yield with subsoiling compared with no‐till planting. Tollner et al (1987) found that paraplowing effects on soil physical properties in the Piedmont persisted for more than 2 yr but crop yield was not improved.…”

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Comparison of Tillage Types and Frequencies for Cotton on Southern Piedmont Soil

Schomberg¹,

Langdale²,

Franzluebbers³

et al. 2003

Agronomy Journal

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creased cotton yields at two locations, did not affect yields at four locations, and decreased yields at the re-Tillage to disrupt root-restricting, consolidated soil zones can immaining two locations. Langdale et al. (1981) reported prove rooting capacity and crop production, but costs increase with the need for more powerful tractors. Between 1992 and 1996, agro-an improvement in corn (Zea mays L.) yield with subnomic and economic consequences of annual or less frequent soil soiling compared with no-till planting. Tollner et al. disruption treatments were evaluated for cotton (Gossypium hirsutum (1987) found that paraplowing effects on soil physical L.) on a Typic Kanhapludult. Two soil-disruptive treatments, fall properties in the Piedmont persisted for more than 2 yr paratillage (PT) and in-row chisel (IC) at planting (spring), were but crop yield was not improved. Clark et al. (1993) compared with two shallow-tillage treatments, coulter planting plus concluded fall chiseling with a paratill needed to be weed control with sweeps (ST) and conventional disk tillage (DT). conducted annually for Piedmont soils to ensure min-The IC, PT, and ST treatments were applied annually or in Years 3, 4, and 5. Lint yield with annual IC was 15 to 20% greater than with imizing the effects of soil compaction on crop growth. DT each year. In 1994, yields ranged from 0.53 to 0.84 Mg ha Ϫ1 with Several studies have compared the effects of using annual IC and were better than with annual ST or PT. In 1995, yields different types of deep tillage implements and the effects ranged from 0.92 to 1.29 Mg ha Ϫ1 , with the top yield associated with of deep tillage vs. conventional tillage and no-tillage current-year IC application. In 1996, no differences in yield were (Busscher et al., 1988; Reeder et al., 1993; Kanwar et observed among tillages; however, yields of two IC treatments were al., 1997; Raper et al., 2000a, 2000b). Few studies have among the top five. For Years 3, 4, and 5, cotton yields were numericompared tillage type and frequency, especially for soils cally greater with annual IC than with annual PT and ST. Yields with PT, ST, and DT were not different. Average annual net returns from of the Southern Piedmont and cotton production sysannual IC were $450, $403, and $287 ha Ϫ1 greater than those with tems. Raper et al. (2000a) showed that shallow in-row annual DT, PT, and ST, respectively. In-row chisel appears to be a chiseling in the fall was equally or more effective than more economically viable production practice for heavy Piedmont deeper tillage to disrupt an impeding clay layer and soils compared with PT, ST, and DT.

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