APSIM's water and nitrogen modules and simulation of the dynamics of water and nitrogen in fallow systems

Probert, M. E.; Dimes, John; Keating, B. A.; Dalal, Ram C.; Strong, W. M.

doi:10.1016/s0308-521x(97)00028-0

Cited by 477 publications

(287 citation statements)

References 17 publications

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“…APSIM simulates agricultural production systems by combining modules describing the specific processes within the system under investigation. The soil water module SOILWAT2 (Probert et al, 1997), the soil nitrogen module SOILN2 (Probert et al, 1997), and the surface residue module RESIDUE2 (Probert et al, 1997) were linked with the wheat crop module APSIM-WHEAT (Keating et al, 2001), which simulates wheat growth and development in response to climatic, soil and management inputs. All management details were specified via the MANAGER module.…”

Section: Methodsmentioning

confidence: 99%

The autumn break for cropping in southeast Australia: trends, synoptic influences and impacts on wheat yield

Pook

Lisson

Risbey

et al. 2008

Intl Journal of Climatology

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ABSTRACT:The autumn break is the first significant rainfall event of the winter growing season. Two definitions of the autumn break have been developed for northwestern Victoria; a so-called ideal break and a minimum rainfall condition for sowing a wheat crop termed a minimal break. Application of the ideal break definition for an eight-station average reveals that 41 autumn breaks occurred in the first half of the record and 34 in the second half ) with a trend towards breaks occurring later in the season. In the decade to 2006, there have been only 3 ideal breaks (1999, 2000 and 2005) and none of the selected rainfall stations has recorded an 'extreme' wet autumn over the last 11 years, the longest period recorded for this criterion. A synoptic analysis for the period 1956-2006 has established that breaks are predominantly associated with systems known as cutoff lows. The influence of these systems has varied markedly throughout the analysis period and only one autumn break has been caused by a cutoff low in the final decade of the analysis. Additionally, the total rainfall associated with cutoff lows in the April to June period has declined significantly over the past 30 years.A farming system model has been employed to simulate a wheat crop in northwestern Victoria under historical conditions for a range of management options. Average yield across all years of the simulation declines with delay in the sowing date after late April, but there is a marked interannual variability in yield response to the sowing date which is related to rainfall distribution in the growing season in each year. The simulated in-crop rainfall indicates that the most recent drought in southeastern Australia is comparable in severity with the two major droughts in the 20th Century.

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Section: Methodsmentioning

confidence: 99%

The autumn break for cropping in southeast Australia: trends, synoptic influences and impacts on wheat yield

Pook

Lisson

Risbey

et al. 2008

Intl Journal of Climatology

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“…To capture these drought stress effects in the plant and allow multi-year simulations, we chose to use a model with accurate representation of physiological responses to drought and a soil water balance that can be simulated continuously from one year to the other, also during fallows. The APSIM model (Keating et al, 2003) has been developed especially for semi-arid environments and has been extensively validated for wheat (Asseng et al, 1998a,b;Probert et al, 1998) and maize (Nelson et al, 1998), also in the North China Plain (Chen et al, 2010a,b;Liu et al, 2010). The model simulates crop growth and the soil water balance and can simulate a sequence of different crops with intermittent fallow periods.…”

Section: Apsim Calibration and Validationmentioning

confidence: 99%

Towards groundwater neutral cropping systems in the Alluvial Fans of the North China Plain

Oort

Wang

Vos

et al. 2016

Agricultural Water Management

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a b s t r a c tGroundwater levels in the North China Plain (NCP), the bread basket of China, have dropped more than one meter per year over the last 40 years, putting at risk the long term productivity of this region. Groundwater decline is most severe in the Alluvial Fans where our study site is located. Avoiding a foreseeable systems collapse requires region-wide changes in crop systems management, underpinned by sound environmental policies. Here, we explore the potential of crop system adaptation to remedy the excessive water use and quantify the likely yield penalties associated with more sustainable water use practices. Using simulations with the APSIM cropping systems model we explore production opportunities in an area within the NCP with intensive cropping and no access to irrigation from rivers. We estimate the attainable production levels for wheat and maize if agriculture were made groundwater neutral, through changes in crop sequence, irrigation practices and water conservation technologies (e.g. mulching with plastic film). Total grain production would drop by 44% compared to current practice if agriculture were made groundwater neutral. Water conservation by plastic film could limit this reduction to 21-33% but possible environmental impacts of plastic film need attention. This analysis facilitates a much needed debate on alternative agronomic practices and incentives through a quantitative comparison of adaptation options. Our biophysical analysis needs to be complemented with socio-economic considerations and discussions with all stakeholders. Similar analyses in other parts of the NCP are possible but require more accurate modelling of landscape hydrology and (towards the coast) risk of salt water intrusion.

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“…Of the total 1.1 Mha of lupin sown in Australia in 2001, about 80% was grown in the Mediterranean environment of Western Australia (ABARE 2003), where it is widely grown because of its adaptation to coarse-textured and acidic soils (Perry et al 1998), its rotational benefits from breaking the disease cycles of cereals (Reeves et al 1984), and its ability to add significant amounts of fixed nitrogen (N) to the soil (Armstrong et al 1997;Anderson et al 1998a). However, the year-to-year variability of yield and low harvest index are major concerns for profitable lupin production (Dracup and Kirby 1996b;Perry et al 1998). Such variability reflects interactions among plant architecture, phenology, and seasonal growing conditions.…”

Section: Introductionmentioning

confidence: 99%

Simulating lupin development, growth, and yield in a Mediterranean environment

Farré

Robertson

Asseng

et al. 2004

Aust. J. Agric. Res.

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Abstract. Simulation of narrow-leafed lupin (Lupinus angustifolius L.) production would be a useful tool for assessing agronomic and management options for the crop. This paper reports on the development and testing of a model of lupin development and growth, designed for use in the cropping systems simulator, APSIM (Agricultural Production Systems Simulator). Parameters describing leaf area expansion, phenology, radiation interception, biomass accumulation and partitioning, water use, and nitrogen accumulation were obtained from the literature or derived from field experiments. The model was developed and tested using data from experiments including different locations, cultivars, sowing dates, soil types, and water supplies. Flowering dates ranged from 71 to 109 days after sowing and were predicted by the model with a root mean square deviation (RMSD) of 4-5 days. Observed grain yields ranged from 0.5 to 2.7 t/ha and were simulated by the model with a RMSD of 0.5 t/ha. Simulation of a waterlogging effect on photosynthesis improved the model performance for leaf area index (LAI), biomass, and yield. The effect of variable rainfall in Western Australia and sowing date on yield was analysed using the model and historical weather data. Yield reductions were found with delay in sowing, particularly in water-limited environments. The model can be used for assessing some agronomic and management options and quantifying potential yields for specific locations, soil types, and sowing dates in Western Australia.

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APSIM's water and nitrogen modules and simulation of the dynamics of water and nitrogen in fallow systems

Cited by 477 publications

References 17 publications

The autumn break for cropping in southeast Australia: trends, synoptic influences and impacts on wheat yield

The autumn break for cropping in southeast Australia: trends, synoptic influences and impacts on wheat yield

Towards groundwater neutral cropping systems in the Alluvial Fans of the North China Plain

Simulating lupin development, growth, and yield in a Mediterranean environment

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