Increasing wheat yields in north-eastern Victoria by liming and deep ripping

Coventry, David; Reeves, TG; Brooke, HD; Ellington, A; Slattery, WJ

doi:10.1071/ea9870679

Cited by 37 publications

(10 citation statements)

References 8 publications

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“…It has also received great acceptance by the farming community. There are several reasons for this: besides reducing P losses, there is usually a yield benefit associated with liming (Coventry et al, 1987), which increases the cost-effectiveness of the method. However, there are still unanswered questions related to structure liming that require more field studies (e.g., to clarify the effect of structure liming on P leaching as a function of available soil P content alone and in combination with different clay contents in soil).…”

Section: Reflections On the Use Of Best Management Practices To Reducmentioning

confidence: 99%

Turnover and Losses of Phosphorus in Swedish Agricultural Soils: Long-Term Changes, Leaching Trends, and Mitigation Measures

et al. 2015

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Transport of phosphorus (P) from agricultural fields to water bodies deteriorates water quality and causes eutrophication. To reduce P losses and optimize P use efficiency by crops, better knowledge is needed of P turnover in soil and the efficiency of best management practices (BMPs). In this review, we examined these issues using results from 10 Swedish long-term soil fertility trials and various studies on subsurface losses of P. The fertility trials are more than 50 years old and consist of two cropping systems with farmyard manure and mineral fertilizer. One major finding was that replacement of P removed by crops with fertilizer P was not sufficient to maintain soil P concentrations, determined with acid ammonium lactate extraction. The BMPs for reducing P leaching losses reviewed here included catch crops, constructed wetlands, structure liming of clay soils, and various manure application strategies. None of the eight catch crops tested reduced P leaching significantly, whereas total P loads were reduced by 36% by wetland installation, by 39 to 55% by structure liming (tested at two sites), and by 50% by incorporation of pig slurry into a clay soil instead of surface application. Trend analysis of P monitoring data since the 1980s for a number of small Swedish catchments in which various BMPs have been implemented showed no clear pattern, and both upward and downward trends were observed. However, other factors, such as weather conditions and soil type, have profound effects on P losses, which can mask the effects of BMPs.

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Section: Reflections On the Use Of Best Management Practices To Reducmentioning

confidence: 99%

Turnover and Losses of Phosphorus in Swedish Agricultural Soils: Long-Term Changes, Leaching Trends, and Mitigation Measures

et al. 2015

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“…Higher use of N fertilizer and higher removal of cations when using the wheat for both forage and grain compared to grain only may accelerate acidification, especially when soils are not limed. Although numerous studies have investigated the effects of lime on grain yields of various crops, only a few studies have reported how the biomass production of wheat is affected by soil pH and liming rates (2,9). The objectives of the present work were to: (i) determine the effect of lime applications on soil pH; (ii) examine the effect of liming on the yield and quality of winter wheat forage; and (iii) examine the economics of liming winter wheat for forage.…”

Section: Introductionmentioning

confidence: 99%

Yield and Quality of Winter Wheat Forage As Affected by Lime

Zhang¹,

Schroder²,

Krenzer³

et al. 2004

Forage grazinglands

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The majority of winter wheat (Triticum aestivum L.) planted in the southern Great Plains is intended for forage or dual‐purpose (grazing and grain) production. Up to 28% of Oklahoma wheat fields have a soil pH less than 5.5 (0‐ to 6‐inch depth) and should be limed to sustain forage and grain wheat yields. This study investigated the effects of seven lime rates on fall forage yields and quality of a winter wheat cultivar planted in a field with the initial pH of 4.5. Soil pH was increased as lime rate increased. Forage yields nearly doubled in the first year when lime rates of 1.25 tons/acre and higher were applied. An application of 1.25 tons/acre, half of the rate recommended to raise soil pH to 6.8, was found to be the most economical, as the value from increased forage production is more than double the cost of liming at this rate. The cost of liming at other tested rates can also be recouped if increased forage yields occurred for two or more years. Our results suggest it is economical to lime low pH soils used for forage or dual‐purpose winter wheat production.

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“…Deep tillage is one way to treat soil compaction to promote deep rooting (e.g. Coventry et al, 1987). However, crop responses to deep tillage have often been variable and the soil may recompact to densities equal to or even greater than before (Mead and Chan, 1988).…”

Section: Introductionmentioning

confidence: 99%

Field evaluation of laboratory techniques for predicting the ability of roots to penetrate strong soil and of the influence of roots on water sorptivity

et al. 1993

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The ability of two laboratory screening techniques to predict the abilities of roots of eight crop species to penetrate a compacted soil were evaluated and compared in a field experiment. A soil tilled to remove the effects of mechanical resistance was planted with the same species to serve as a control. Depth of root penetration, root density and the influence of the roots on the sorptivity of water were measured.Roots of all species penetrated deeper in the deep tilled than compacted soils. There were differences in the ability of roots of the species to penetrate the compacted soil. Generally dicotyledonous species had more roots penetrating to depth in both the compact and deep tilled soils. Within the main species classifications, lupin and safflower (dicotyledons) and oats and barley (monocotyledons) had the highest penetration into the compacted soil.Water sorptivities in the deep tilled soils were higher than those of the compact soil. Soil from planted treatments had higher sorptivities than soil which had not been planted. This is attributed to biopores left by the roots. Sorptivities of soils which had dicotyledonous species were generally higher than those of monocotyledons. The soil planted with safflower produced the highest sorptivity in the compacted layer (0.1-0.3 m).A comparison of the accuracy of the two laboratory screening methods in predicting the field penetration of roots suggest that the method involving mechanical stress was better than that involving osmotic stress. Relative root diameter was found to be a better indicator of the penetration ability of roots than relative root elongation.

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Increasing wheat yields in north-eastern Victoria by liming and deep ripping

Cited by 37 publications

References 8 publications

Turnover and Losses of Phosphorus in Swedish Agricultural Soils: Long-Term Changes, Leaching Trends, and Mitigation Measures

Turnover and Losses of Phosphorus in Swedish Agricultural Soils: Long-Term Changes, Leaching Trends, and Mitigation Measures

Yield and Quality of Winter Wheat Forage As Affected by Lime

Field evaluation of laboratory techniques for predicting the ability of roots to penetrate strong soil and of the influence of roots on water sorptivity

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