Ashfaq Ahmad

Ashfaq Ahmad
Agro Climatology Lab., University of Agriculture, Faisalabad, Pakistan · Agronomy

PhD (Agronomy)

About

213
Publications
148,814
Reads
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4,340
Citations
Additional affiliations
January 2013 - February 2016
Agro Climatology Lab., University of Agriculture, Faisalabad, Pakistan
Position
  • Professor
January 2011 - present
University of Agriculture, Faisalabad Pakistan
Position
  • Professor (Full)
Description
  • Courses: Agro-meteorology, crop ecology, Advanced Agronomy, Climate change and crop productivity, Spectral reflectance indices.
Education
April 1995 - October 2000

Publications

Publications (213)
Article
Full-text available
Timely and accurate estimation of rice-growing areas and forecasting of production can provide crucial information for governments, planners, and decision-makers in formulating policies. While there exists studies focusing on paddy rice mapping, only few have compared multi-scale datasets performance in rice classification. Furthermore, rice mappin...
Article
Full-text available
Land surface temperature (LST) is defined as a phenomenon which shows that microclimate of an urban system gets heated much faster than its surrounding rural climates. The expansion of buildings has a noteworthy influence on land use/land cover (LULC) due to conversion of vegetation land into commercial and residential areas and their associated in...
Chapter
Full-text available
Adaptations in Cropping System and Pattern for Sustainable Crops Production under Climate Change Scenarios
Chapter
ABSTRACT Climate change may disturb the species abundance and diversity which may eradicate the efficiency of pest and insect management programs. There is a need to modify the existing monitoring tools and use new ones to detect overall changes in the distribution of pests, damage assessment, population ecology, yield losses and assessment of impa...
Article
Full-text available
Future climate scenarios are predicting considerable threats to sustainable maize production in arid and semi-arid regions. These adverse impacts can be minimized by adopting modern agricultural tools to assess and develop successful adaptation practices. A multi-model approach (climate and crop) was used to assess the impacts and uncertainties of...
Chapter
Rice (Oryza sativa) production systems have faced the two opposing challenges all over the world: the need to increase the production to nourish the world’s increasing population and reducing the emissions of greenhouse gases (GHG). Nitrous oxide (N2O), carbon dioxide (CO2), methane (CH4), and chlorofluorocarbons (CFCs) are the most significant GHG...
Chapter
Water requirement is rising day by day, however, the possibilities of improvement of water assets or preserving their sustainable use are failing in Pakistan. Climate Change affects water accessibility during critical times. Irregular droughts, as well as floods caused by climate change, pose a serious threat to many developing countries including...
Chapter
Climatic changes are associated with fluctuations spanning over a period of three decades as a classic period of computing weather trends all around the world which, by studies till now, was proved to be harmful for life on earth. Natural processes going on in this earth were observed to be impacted significantly by these variations in our climate...
Chapter
Full-text available
The present food system (including production, transportation, processing, packaging, storing, retail, and consumption) is a source of nutrition for the great majority of the world population in addition to supporting the livelihoods of about 200 million people. Food supply per capita has increased by more than 30% since 1961, this is accompanied b...
Article
Full-text available
The rapid increase in urbanization has an important effect on cropping pattern and land use/land cover (LULC) through replacing areas of vegetation with commercial and residential coverage, thereby increasing the land surface temperature (LST). The LST information is significant to understand the environmental changes, urban climatology, anthropoge...
Article
Full-text available
Pakistan is included in top 50 countries which are estimated to face serious agriculture and food deficiency related challenges due to the worldwide pandemic coronavirus 2019 (COVID-19). The aim of this study was to evaluate the effects of COVID-19 on food supply chain and agriculture in Punjab, Pakistan, by using space–time scan statistic (STSS)....
Article
Full-text available
The vulnerability of wheat to climate change is accelerating at an increasing rate. This paper reviews the climate change trends, climate change impacts, quantification methods and adaption options in the arid and semi-arid environment. The temperature of mid-latitude of Asia may increase 2.4°C during the wheat season. Different studies reported th...
Preprint
Full-text available
Food service and retailing sectors play a vital role in economics of Punjab, Pakistan. Pakistan is included in top 50 countries which are estimated to face serious agriculture and food deficiency related challenges due to the world-wide pandemic coronavirus 2019 (COVID-19). The aim of this study was to study the effects of COVID-19 on food security...
Article
Full-text available
Rising temperature from climate change is the most threatening factor worldwide for crop production. Sustainable wheat production is a challenge due to climate change and variability, which is ultimately a serious threat to food security in Pakistan. A series of field experiments were conducted during seasons 2013-2014 and 2014-2015 in the semi-ari...
Chapter
Full-text available
Climate change has adverse effects on food security all over the world, especially in developing countries where increasing population is confronting food insecurity and malnutrition. The challenge is compounded by the need to adapt to the changing climate to minimize the potential impacts on agriculture production. The Agricultural Model Intercomp...
Article
Accurate and timely information about production estimates of wheat is useful for policymakers and government planners. The traditional methods for yield forecasting are labor insensitive and time-consuming therefore remote sensing is an effective approach for precise yield forecasting. The study was planned to develop a comprehensive framework for...
Article
Full-text available
The aim of this study was to determine the affectivity of plant growth promoting rhizobacteria (PGPR) on some biochemical and agronomic parameters of maize exposed to drought stress. Two PGPR species viz. Bacillus cereus and Pseudomonas putida were applied as bioinoculant. Different methods of application of PGPR were used at different developmenta...
Article
Full-text available
The aim of this study was to determine the affectivity of plant growth promoting rhizobacteria (PGPR) on some biochemical and agronomic parameters of maize exposed to drought stress. Two PGPR species viz. Bacillus cereus and Pseudomonas putida were applied as bioinoculant. Different methods of application of PGPR were used at different developmenta...
Article
Full-text available
An analytical method associating accelerated solvent extraction (ASE) and solid-phase micro-extraction (SPME) in immersion mode combined with gas chromatography dual electrons capture detectors (SPME-GC-2ECD) has been developed and studied for the simultaneous determination of 19 organochlorine pesticides (OCPs) and 22 polychlorinated biphenyls (PC...
Article
Full-text available
Comparing outputs of multiple climate and crop models is an option to assess the uncertainty in simulations in a changing climate. The use of multiple wheat models under five plausible future simulated climatic conditions is rarely found in literature. CERES-Wheat, DSSAT-Nwheat, CROPSIM-Wheat, and APSIM-Wheat models were calibrated with observed da...
Article
Full-text available
Low planting density and deficient nitrogen application are factors that significantly decrease the yield of pearl millet in Pakistan. Optimizing their management is imperative in increasing millet production efficiency, especially with N fertilization, which can strongly affect hybrid millet response. Therefore, a field experiment was conducted at...
Article
The availability of water and nitrogen (N) to maize during its flowering stage affects the growth of individual kernels. The present study reports the variability of maize kernel dry weight under different levels of water and N applications. Two consecutive-year experiments were conducted during 2009 and during 2010 to study the interaction between...
Chapter
Crops need water for evaporation (E) and transpiration (T), known as evapotranspiration (ET). However, too much water is not good for various crops. Crop water need depends on growth stage, climate, and crop type. Approximately 40% cotton is produced under irrigated conditions. Water for irrigation is becoming limited in many cotton-growing regions...
Chapter
Cotton is a multifaceted crop of which wholesome or all parts individually can be used for their byproducts in addition to their domestic or economic uses. It provides lint raw material to an ever-increasing textile industry, cotton seed oil for culinary purposes, and edible oil and protein-rich oil cake residue for livestock. Cotton can benefit hu...
Chapter
Cotton production is most vulnerable to climate change particularly in Pakistan, and sustainable cotton yield is critical to accomplish the future demand of the country. Climate change has negative impact on cotton production in major parts of the cotton-growing regions. It hampers not only the yield but also quality of fiber and has negative impac...
Chapter
Crops need water for evaporation (E) and transpiration (T), known as evapotranspiration (ET). However, too much water is not good for various crops. Crop water need depends on growth stage, climate, and crop type. Approximately 40% cotton is produced under irrigated conditions. Water for irrigation is becoming limited in many cotton-growing regions...
Chapter
Food and agriculture are the largest consumers of water, requiring one hundred times more than we use for personal needs. Agricultural water is used to grow fresh produce and sustain livestock. Agriculture is expected to face increasing water risks that will impact production, markets, trade, and food security-risks that can be mitigated with targe...
Technical Report
Full-text available
Agro Ecological Zones of Punjab Pakistan
Article
Full-text available
Water and land both are limited resources. Current management strategies are facing multiple challenges to meet food security of an increasing population in numerous South Asian countries, including Pakistan. The study of land cover/land use changes (LCLUC) and land surface temperature (LST) is important as both provide critical information for pol...
Article
Full-text available
Water and land both are limited resources. Current management strategies are facing multiple challenges to meet food security of an increasing population in numerous South Asian countries, including Pakistan. The study of land cover/land use changes (LCLUC) and land surface temperature (LST) is important as both provide critical information for pol...
Article
Food and agriculture are the largest consumers of water, requiring one hundred times more than we use for personal needs. Agricultural water is used to grow fresh produce and sustain livestock. Agriculture is expected to face increasing water risks that will impact production, markets, trade, and food security-risks that can be mitigated with targe...
Chapter
Every day, new and crucial difficulties and challenges are encountered in agriculture. Using information and communication technologies (ICTs) can be a key facilitation for more efficient crop production. Simply ICT is defined as hub of technologies that support in storage, processing data/information, communication of data/information, and distrib...
Chapter
Food and agriculture are the largest consumers of water, requiring one hundred times more than we use for personal needs. Agricultural water is used to grow fresh produce and sustain livestock. Agriculture is expected to face increasing water risks that will impact production, markets, trade, and food security-risks that can be mitigated with targe...
Chapter
Full-text available
Food and agriculture are the largest consumers of water, requiring one hundred times more than we use for personal needs. Agricultural water is used to grow fresh produce and sustain livestock. Agriculture is expected to face increasing water risks that will impact production, markets, trade, and food security-risks that can be mitigated with targe...
Chapter
Full-text available
Cropping pattern means the proportion of area under various crops at a point of time in a unit area, or it indicates the yearly sequence and spatial arrangements of crops and fallows in an area. The cropping system should provide enough food for the family and fodder for cattle and generate sufficient cash income for domestic and cultivation expens...
Article
Full-text available
Water is the most important limiting factor of cotton (Gossypium hirsutum L.) and wheat (Triticum aestivum L.) cropping systems in semi-arid conditions of Southern Punjab. A two-year field experiment (comprising of cotton-wheat cropping) was conducted in Vehari (Southern Punjab) to calibrate and validate a DSSAT model in the climatic conditions of...
Article
Land use/land cover (LULC) change has serious implications for environment as LULC is directly related to land degradation over a period of time and results in many changes in the environment. Monitoring the locations and distributions of LULC changes is important for establishing links between regulatory actions, policy decisions, and subsequent L...
Article
Full-text available
Land use/land cover (LULC) change has serious implications for environment as LULC is directly related to land degradation over a period of time and results in many changes in the environment. Monitoring the locations and distributions of LULC changes is important for establishing links between regulatory actions, policy decisions, and subsequent L...
Article
Full-text available
Yield gaps in agronomic crops are associated with grain number and per unit grain weight. These yields contributing components are interrelated and have compensatory effects on yield. Path coefficient analysis quantifies the direct influence of one yield component upon the other and allows for the separation of correlation coefficients into direct...
Chapter
Full-text available
Agriculture is very vulnerable to temperature and drought in semi-arid and arid regions. Farming communities are especially vulnerable to the potential impact of climate change on crop and livestock. For Pakistan, a potential increase of 2.8°C for the maximum day temperature and 2.2°C decrease in night temperature by the mid-century has been report...
Chapter
Full-text available
Climate change is a serious threat to agriculture and food security. Extreme weather conditions and changing patterns of precipitation lead to a decrease in the crop productivity. High temperatures and uncertain rainfall decrease the grain yield of crops by reducing the length of growing period. Future projections show that temperature would be inc...
Article
Simulation models are widely used for making decision support especially under sub-optimal climatic conditions for yield improvement. The impact of uncertain weather conditions on cotton production can be explored with the aid of such models. Cotton, being the queen of fibers, enjoys itself a predominant position amongst all other cash crops and ha...
Article
Full-text available
Climate change has adverse effects on food security all over the world, especially in developing countries where the increasing population is confronting food insecurity and malnutrition. Crop models can assist stakeholders in the assessment of climate change in current and future agricultural production systems. The aim of this study was to use of...
Article
Full-text available
Water is the most important limiting factor of cotton (Gossypium hirsutum L.) and wheat (Triticum aestivum L.) cropping systems in semi-arid conditions of Southern Punjab. A two-year field experiment (comprising of cotton-wheat cropping) was conducted in Vehari (Southern Punjab) to calibrate and validate a DSSAT model in the climatic conditions of...
Article
Full-text available
Under changing climatic scenarios, precision agricultural practices are necessary that requires spatial relationship between land attributes and crop yield. To identify the spatial distribution of growth and achene yield of sunflower using GIS map overlay techniques, a field study was conducted at Agronomic Research Area, University of Agriculture,...
Article
Full-text available
Real-time, accurate and reliable estimation of maize yield is valuable to policymakers in decision making. The current study was planned for yield estimation of spring maize using remote sensing and crop modeling. In crop modeling, the CERES-Maize model was calibrated and evaluated with the field experiment data and after calibration and evaluation...
Conference Paper
Full-text available
The evidences for different response of pearl millet to fertilizer application have been reported in the literature with optimum rates ranging from 0 to >150 kg ha-1 (Ullah et al., 2017). The form of N (NO3 – N vs. NH4 – N), N mode and time of application also affect the nitrogen uptake and use efficiency. The authors concluded that absorption of a...
Article
Full-text available
Growth, development, and economic yield of agricultural crops rely on moisture, temperature, light, and carbon dioxide concentration. However, the amount of these parameters is varying with time due to climate change. Climate change is factual and ongoing so, first principle of agronomy should be to identify climate change potential impacts and ada...
Article
Full-text available
Accurately applying N fertilizer is challenging for maize (Zea mays L.) farmers in semiarid regions. The goal of this study was, therefore, to identify the best rates and timing of N applications for optimum maize development and maximum grain yield (GY). A 2-yr study (2009 to 2010) was conducted in the semiarid conditions of Faisalabad, Pakistan....
Article
Future climate projections and impact assessments are critical in evaluating the potential impacts of climate change and climate variability on crop production. Climate change impact assessment in combination with crop, climate models under different climate change scenarios is uncertain and it is challenging to select an appropriate climate scenar...
Article
Full-text available
Unbalanced climate during the last decades have created spatially alarming and destructive situations in the world. Anomalies in temperature and precipitation enhance the risks for crop production in large agricultural region (especially the Southern Punjab) of Pakistan. Detailed analysis of historic weather data (1980-2011) record helped in creati...