نتایج جستجو برای: apsim

تعداد نتایج: 172  

Journal: :Agronomy 2022

Managed plantations of saltbush have the potential to increase productivity and climate resilience farming systems low rainfall areas world, where livestock are important. The objective was dynamically simulate behaviour grazing with a new modelling capacity in APSIM framework enable dynamic forage systems. Scenarios simulated included: choice plant species growing interrow area between shrub-r...

2005
M E Probert R J Delve S K Kimani J P Dimes

The mineralization/immobilization of nitrogen when organic sources are added to soil is represented in many simulation models as the outcome of decomposition of the added material and synthesis of soil organic matter. These models are able to capture the pattern of N release that is attributable to the N concentration of plant materials, or more generally the C:N ratio of the organic input. How...

Journal: :Fudma Journal of Sciences 2023

Climate change threatened rice production in the semi-arid region of Nigeria. Agricultural is affected by variations weather conditions and long-term climate patterns. The pattern changing last three decades indicated that changes rainfall temperature reduced agriculture outputs yields, which significant rice. A farm experiment was set up with six cultivars APSIM model used to simulate grain yi...

Journal: :Water 2021

Soil evaporation (Es) and crop transpiration (Tc) are important components of water balance in cropping systems. Comparing the accurate calculation by models Es Tc to measured has significant advances optimal configuration resource evaluation accuracy estimating consumption. To evaluate adaptation APSIM (Agricultural Production Systems simulator) calculating Nanjing, model parameters, including...

پایان نامه :دانشگاه آزاد اسلامی - دانشگاه آزاد اسلامی واحد تهران مرکزی - دانشکده ادبیات و علوم انسانی 1390

امروزه بروز تغییرات اقلیمی به عنوان یکی از مهم ترین موضوعات در سطح جهان مطرح است. یکی از مباحث مهم در این زمینه اثرات تغییراقلیم بر کشاورزی و امنیت غذائی است. یکی از مشکلاتی که کشاورزی در دنیا به ویژه در مناطق خشک با آن روبروست، نوسان میزان بازده محصولات دیم طی سالهای مختلف است. گندم چه از نظر دارا بودن بالاترین سهم در کل سطح اراضی زیر کشت و چه به عنوان اصلی ترین غذای مردم کشور دارای اهمیت است....

2014
Justin Sexton Yvette Everingham

While several statistical methods are available to analyse model sensitivity, their application to complex process-based models is often impractical due to the large number of simulation runs required. A Bayesian approach to global sensitivity analysis can greatly reduce the number of simulation runs required by building an emulator of the model which is less computationally demanding. A Gaussi...

Journal: :Agricultural Water Management 2023

Climate change and variability threaten the sustainability of future food production, especially in semi-arid regions where water resources are limited irrigated agriculture is widespread. Increasing temperatures will exacerbate evaporative losses increase plant needs. In this regard, higher irrigation intensities have been posited as a solution to mitigate climate impacts these regions. Here, ...

Journal: :Frontiers in sustainable food systems 2021

Ongoing climate change is already affecting crop production patterns worldwide. Our aim was to investigate how increasing temperature and CO 2 as well changes in precipitation could affect potential yields for different historical pedoclimatic conditions at high latitudes (i.e., >55°). The APSIM model used simulate the productivity of four annual crops (barley, forage maize, oats, spring...

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