Leading farmers in South East Australia have closed the exploitable wheat yield gap: Prospects for further improvement

Rees, Harm van; McClelland, Tim; Hochman, Zvi; Carberry, Peter; Hunt, James R.; Huth, Neil; Holzworth, Dean

doi:10.1016/j.fcr.2014.04.018

Cited by 68 publications

(45 citation statements)

References 34 publications

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“…Loss and Siddique 1994;Evans 1987;Richards 1991;Qin et al 2015). However, there have been some suggestions that there may be a need in the future to extend the current, known estimates of potential yield (Passioura 2006;van Rees et al 2014). It is axiomatic that agronomic practices appropriate to support new genotypes will need to be researched concurrently.…”

Section: Estimation Of Potential Grain Yieldmentioning

confidence: 99%

“…Although their availability to field agronomists and farmers has increased (e.g. van Rees et al 2014), their use at the practical crop management level is still evolving, especially since the data required for their operation are not available in all situations (e.g. Stephens et al 2011;Hochman et al 2012;Oliver and Robertson, 2013).…”

Section: Estimation Of Potential Grain Yieldmentioning

confidence: 99%

“…van Rees et al (2014) Potential of modelling to develop new practices to assist in closing the yield gap in wheat. Analysis of three leading farms.…”

Section: Anderson Et Al (2014)mentioning

confidence: 99%

“…The papers summarised in Table 1 refer largely to winter cereals and range from about 25 to more than 85 % efficiency. The higher efficiencies are mainly reported from studies on crops in higher-yielding conditions (Fischer and Edmeades 2010;van Rees et al 2014;Fischer et al 2014) or where the major limiting factors have been determined experimentally ). Studies that report variation related to agro-ecological regions vary from about 30 to 75% Anderson 2010;Stephens et al 2011;Hochman et al 2012;Oliver and Robertson 2013;van Wart et al 2013).…”

Section: Management Efficiency and The Yield Gapmentioning

confidence: 99%

“…It has been suggested that this levelling or declining of yields may be due to soil degradation and nutrient depletion (Ladha et al 2003;Zika and Erb 2009), climatic changes (Stephens et al 2011), failure to adjust management practices to variable seasonal conditions (Simpson et al 2007;Tokatlidis 2014) or farmers' perceptions of risk and diminishing returns (e.g. Anderson 2010; Hochman et al 2012;van Rees et al 2014;Siddique et al 2012). Although trends in grain yield improvement over an extended period in a production area have seldom been smooth or linear (e.g.…”

Section: Introductionmentioning

confidence: 99%

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Addressing the yield gap in rainfed crops: a review

Anderson

Johansen

Siddique

2016

Agron. Sustain. Dev.

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The problems and challenges of rapidly increasing world population, global climate change, shortages of water suitable for irrigation and degradation of agricultural land are increasing the demand to improve grain production from rainfed arable lands. Specific challenges include estimating the size and thus the value of the yield gap, identifying the factors limiting current average production and designing profitable remedial strategies for a range of agro-ecological regions. This review of the rainfall-limited potential yields and the gap between actual or average yields of cereal and legume crops and the rainfall-limited potential indicates that there is still substantial room to increase the average yield of crops in rainfed systems in both developed and developing regions. The review has indicated that (1) the size of the gap between average and potential yields varies according to the agro-ecological zone and the available technologies from about 0.5 to over 5 t/ha, leaving considerable scope for future yield improvement; (2) there is relatively less information applicable at the farm or field scale that assesses the spatial and temporal variability of the yield gap, the reasons for the gap and the possible methods to close the gap; (3) there is also limited information on the feasibility and profitability of applying various approaches to close the gap, including tactical and strategic management practices and plant breeding; (4) the evidence of the impact of the components of conservation agriculture on crop yields in a wide range of agro-ecological regions supports the adoption of zero tillage and crop rotation but is less clear in support of residue retention; (5) objective identification and testing of factors that limit production can lead to a rational sequence of amelioration that is specific to each agro-ecological or field situation and can close the yield gap in winter-dominant rainfall environments; and (6) farmerparticipatory varietal selection, including breeding for specific adaptation can make a substantial contribution to closing the gap in a range of environments. A common observation from the reports reviewed here is that sustainable yield improvement will need to employ a range of methods that are appropriate to specific agro-ecological conditions-previous approaches based on single inputs, practices or genotypes can only be partial solutions.

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Section: Estimation Of Potential Grain Yieldmentioning

confidence: 99%

Section: Estimation Of Potential Grain Yieldmentioning

confidence: 99%

“…van Rees et al (2014) Potential of modelling to develop new practices to assist in closing the yield gap in wheat. Analysis of three leading farms.…”

Section: Anderson Et Al (2014)mentioning

confidence: 99%

Section: Management Efficiency and The Yield Gapmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Addressing the yield gap in rainfed crops: a review

Anderson

Johansen

Siddique

2016

Agron. Sustain. Dev.

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Evaluating agronomic factors for maize production in a semi‐arid Loess Plateau

Gao

Bao-liang

et al. 2021

Agronomy Journal

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Crop production is often affected by multiple agronomic factors. However, little has been reported on the synergistic effects of multiple factors on crop production. Here, we reported the effects of five factors (i.e., variety, planting density, nitrogen application, This article is protected by copyright. All rights reserved.supplementary irrigation and plastic mulching) on crop yields, using data from a 5-year experiment at Dongyang, Shanxi province of China. An incomplete factorial design with these factors comprised 12 treatments, including two controls: optimized technology (OT) and conventional technology (CT), comprising all five factors applied at the added or subtracted level, respectively. The result showed that, on 5-year average, OT significantly increased maize yield by 3.5 Mg ha -1 (44.3% more) as compared to CT (7.9 Mg ha -1 ), showing a huge potential for increasing yields. Among the five factors, plastic mulching contributed the most in yield increase (11.5%), high density, improved variety and irrigation contributed 9.9%, 6.9% and 5.1% increase in yield, respectively. There were no significant differences in yield between two N input levels (i.e., 225 and 300 kg N ha -1 ), suggesting the N input of 225 kg N ha -1 was sufficient to realize yield level of 8-11 Mg ha -1 in the studied area. In conclusion, reducing yield gap can only be achieved by optimizing multiple factors simultaneously because the effects of single measure are relatively small and inconsistent among years. The results of our study would help develop adaptive management practices for increasing crop yield stability in other semi-arid regions.

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Learning to balance wheat G × E × M interactions in response to a changing climate—The case for ultra‐early planting systems

Collier,

Spaner,

Beres

2024

Agronomy Journal

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Reported global reductions in cereal grain yields due to increased global average temperature combined with increasing global populations peaking near 2050 create an immediate need to increase cereal grain yield potential and reduce the yield gap between realized on‐farm grain yield and potential yield. The development of an ultra‐early planting system for spring wheat (Triticum aestivum L.) on the northern Great Plains can increase the resiliency of current growing systems to a changing climate. This was achieved through the development of a unique set of practices designed to successfully shift current wheat production systems to ultra‐early growing systems. Ultra‐early planted wheat growing systems on the northern Great Plains will provide immediate benefits to the adopting producer in the form of increased grain yield and increased grain yield stability relative to current practices. As global average temperatures warm, and atmospheric CO2 concentrations increase, the northern Great Plains region is in a unique position to potentially realize grain yield increases rather than temperature driven grain yield decreases. Shifting planting earlier and taking advantage of increased growing degree day accumulation and water use efficiencies while avoiding higher temperatures during sensitive physiological periods are tactics implemented in ultra‐early growing systems that will increase in importance and relevance in the next three decades as average daily temperatures increase.This article is protected by copyright. All rights reserved

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Leading farmers in South East Australia have closed the exploitable wheat yield gap: Prospects for further improvement

Cited by 68 publications

References 34 publications

Addressing the yield gap in rainfed crops: a review

Addressing the yield gap in rainfed crops: a review

Evaluating agronomic factors for maize production in a semi‐arid Loess Plateau

Learning to balance wheat G × E × M interactions in response to a changing climate—The case for ultra‐early planting systems

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