Closing the gap between actual and potential yield of rainfed wheat. The impacts of environment, management and cultivar

Anderson, W. K.

doi:10.1016/j.fcr.2009.11.016

Cited by 114 publications

(87 citation statements)

References 55 publications

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“…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). The range is similar for data derived from experiments examining various agronomic treatments (Simpson et al 2007;Anderson et al 2014).…”

Section: Management Efficiency and The Yield Gapmentioning

confidence: 99%

“…Breeding, genetics and physiology. The methods for assessing advances attributable to both genetic and management factors are subject to errors and assumptions that can distort the proportions of each (Anderson 2010), but it seems that the genetic potential of most modern cultivars of wheat (for example) far exceed the seasonal potential set by rainfall. This implies that breeding for yield stability through disease resistance, and for profit stability through improved quality, should be the main focus for breeders rather than increasing the genetic yield potential.…”

Section: Relative Contributions-management and Breedingmentioning

confidence: 99%

“…Often, responses due to tactical and strategic management practices are additive such that improvement in one is not dependent on application of the other (Anderson 2010). This gives farmers some scope to adjust management according to seasonal conditions and available resources.…”

Section: Diagnosis Of Constraintsmentioning

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: Management Efficiency and The Yield Gapmentioning

confidence: 99%

Section: Relative Contributions-management and Breedingmentioning

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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“…Anderson (2010) also analyzed the relative and individual importance of environmental factors (rainfall, temperature, radiation etc.) management practices (including the choice of crop and cultivar, fertilizer amount and timing, weed, insect and disease control) and cultivars for yield improvement of wheat and emphasized the interactions among them.…”

Section: Resultsmentioning

confidence: 99%

Impact of erosion and tillage on the productivity and quality of selected semiarid soils of Iran

Mehdizade¹,

Asadi²,

Shabanpour³

et al. 2013

International Agrophysics

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A b s t r a c t. This greenhouse research was carried out to study the effects of water and tillage erosion on agricultural productivity and soil quality in soil samples from a semiarid region of Iran. A factorial experiment of complete randomized block design was used to compare the effects of soil erosion (eroded and non-eroded soils), slope position, water stress and fertilizer (N-P-K) on yield and yield components of wheat as soil productivity index. The results showed that erosion ie water and tillage erosion has a significant effect (p<0.01) in decreasing soil productivity due to its negative impact on soil organic matter, nutrients (N and K) and hydraulic conductivity. Complete N-P-K fertilization and water stress had significant effects on increasing and decreasing of wheat yield, respectively. The effect of water stress in particular was so high that it could eclipse the erosion impact on yield reduction. Wheat dry matter and grain mass on foot and mid slopes were significantly higher than that on upslope positions where total N and available K were the lowest and equivalent calcium carbonate the highest. Saturated hydraulic conductivity and total nitrogen were found to be the most important soil properties as far as their correlations to wheat yield are concerned.K e y w o r d s: slope position, greenhouse experiment, wheat, fertilizer, water stress INTRODUCTIONMore than 60% of Iran farm lands are under dryland farming of wheat, barley and other cereal crops. The area under dryland farming of wheat alone is around 4 to 5 mln ha (Agricultural Statistics of Iran, 1998). A large fraction of Iran cultivated lands (dryland and irrigated) is devoted to wheat and barley which are the main sources of staple food and protein for the average Iranian. Wheat alone covers about one third and fruit tree plantations cover nearly one fifth of the total irrigated lands of Iran. Cereal crops ie wheat, barley, and rice) cover almost 70% of the cultivated land, while wheat alone covers nearly 52%. In Iran, it is a well established fact that the average yield of different crops is much higher under irrigated system than under dryland farming. For example, the average yield of irrigated wheat is about 3 200 kg ha -1 while under dryland farming this figure is below 1 000 kg ha -1 (Siadat, 1998).Erosion is very severe in the semiarid and drylands regions of Iran due to high erodibility of the soil and poor vegetation cover. The increasing population and the need for more food and fibre have pushed farmers to use lands which are not suitable for farming, especially on steep slopes (Ahmadi-Iikhchi et al., 2003). Many grasslands have also been destroyed due to high stocking rate and over-grazing, resulting in severe soil degradation (Asadi et al., 2012).Soil erosion, in the form of mass downslope transport, is also intense under the conventional tillage systems which employs the mouldboard plough (Alvarez et al., 1995), still the most common form of tillage in Iran. On-site impact of accelerated soil erosion includes short-time ...

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“…Frequent research experiments and field trials are examine the influence of method of land use, soils, climate and agronomic practices on farm production systems [2] [3]. However, the use of data mining and other analytical techniques has become increasingly important in crop prediction and decision making [4].…”

Section: Introductionmentioning

confidence: 99%

An Improved Feature Selection and Classification using Decision Tree for Crop Datasets

Chouhan¹,

Singh²,

Singh³

2016

IJCA

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In this paper a more improved Feature Selection and Classification technique is implanted on Benchmark Datasets such as Mushroom and Soyabean. The Proposed Methodology implemented is based on the Hybrid Combinatorial method of Applying PSO-SVM for the selection of Features from the Dataset and Then Classification is done using Fuzzy Based Decision Tree. Experimental results when performed on Various Datasets prove that the proposed methodology extracts more features as well as provides more accuracy as compared to existing methodologies.

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Closing the gap between actual and potential yield of rainfed wheat. The impacts of environment, management and cultivar

Cited by 114 publications

References 55 publications

Addressing the yield gap in rainfed crops: a review

Addressing the yield gap in rainfed crops: a review

Impact of erosion and tillage on the productivity and quality of selected semiarid soils of Iran

An Improved Feature Selection and Classification using Decision Tree for Crop Datasets

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