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Article ; Online: CSM-CROPGRO model to simulate safflower phenological development and yield.

Afzal, Obaid / Ahmed, Mukhtar / Fayyaz-Ul-Hassan / Shabbir, Ghulam / Ahmed, Shakeel / Hoogenboom, Gerrit

2024

Abstract: Crop simulation models are valuable tools for decision making regarding evaluation and crop improvement under different field conditions. CSM-CROPGRO model integrates genotype, environment and crop management portfolios to simulate growth, development ... ...

Abstract	Crop simulation models are valuable tools for decision making regarding evaluation and crop improvement under different field conditions. CSM-CROPGRO model integrates genotype, environment and crop management portfolios to simulate growth, development and yield. Modeling the safflower response to varied climate regimes are needed to strengthen its productivity dynamics. The main objective of the study was to evaluate the performance of DSSAT-CSM-CROPGRO-Safflower (Version 4.8.2) under diverse climatic conditions. The model was calibrated using the field observations for phenology, biomass and safflower grain yield (SGY) of the year 2016-17. Estimation of genetic coefficients was performed using GLUE (Genetic Likelihood Uncertainty Estimation) program. Simulated results for days to flowering, maturity, biomass at flowering and maturity and SGY were predicted reasonably with good statistical indices. Model evaluation results elucidate phenological events with low root mean square error (6.32 and 6.52) and high d-index (0.95 and 0.96) for days to flowering and maturity respectively for all genotypes and climate conditions. Fair prediction of safflower biomass at flowering and maturity showed low RMSE (887.3 and 564.3 kg ha
Language	English
Publishing date	2024-03-27
Publishing country	United States
Document type	Journal Article
ZDB-ID	280324-0
ISSN	1432-1254 ; 0020-7128
ISSN (online)	1432-1254
ISSN	0020-7128
DOI	10.1007/s00484-024-02662-0
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Article ; Online: Response of spring wheat (Triticum aestivum L.) quality traits and yield to sowing date.

Ahmed, Mukhtar / Fayyaz-ul-Hassan

PloS one

2015 Volume 10, Issue 4, Page(s) e0126097

Abstract: The unpredictability and large fluctuation of the climatic conditions in rainfed regions do affect spring wheat yield and grain quality. These variations offer the opportunity for the production of better quality wheat. The effect of variable years, ... ...

Abstract	The unpredictability and large fluctuation of the climatic conditions in rainfed regions do affect spring wheat yield and grain quality. These variations offer the opportunity for the production of better quality wheat. The effect of variable years, locations and sowing managements on wheat grain yield and quality was studied through field experiments using three genotypes, three locations for two years under rainfed conditions. The two studied years as contrasting years at three locations and sowing dates depicted variability in temperature and water stress during grain filling which resulted considerable change in grain yield and quality. Delayed sowing, years (2009-10) and location (Talagang) with high temperature and water stress resulted increased proline, and grain quality traits i.e. grain protein (GP) and grain ash (GA) than optimum conditions (during 2008-09, at Islamabad and early sowing). However, opposite trend was observed for dry gluten (DG), sodium dodecyl sulphate (SDS), SPAD content and grain yield irrespective of genotypes. The influence of variable climatic conditions was dominant in determining the quality traits and inverse relationship was observed among some quality traits and grain yield. It may be concluded that by selecting suitable locations and different sowing managements for subjecting the crop to desirable environmental conditions (temperature and water) quality traits of wheat crop could be modified.
MeSH term(s)	Chlorophyll/analysis ; Chlorophyll/metabolism ; Crops, Agricultural/growth & development ; Crops, Agricultural/metabolism ; Glutens/analysis ; Glutens/metabolism ; Plant Proteins/analysis ; Plant Proteins/metabolism ; Proline/analysis ; Proline/metabolism ; Seasons ; Sodium Dodecyl Sulfate/analysis ; Sodium Dodecyl Sulfate/metabolism ; Triticum/growth & development ; Triticum/metabolism
Chemical Substances	Plant Proteins ; Chlorophyll (1406-65-1) ; Sodium Dodecyl Sulfate (368GB5141J) ; Glutens (8002-80-0) ; Proline (9DLQ4CIU6V)
Language	English
Publishing date	2015-04-30
Publishing country	United States
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	2267670-3
ISSN	1932-6203 ; 1932-6203
ISSN (online)	1932-6203
ISSN	1932-6203
DOI	10.1371/journal.pone.0126097
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Article ; Online: Toxicity of NiO nanoparticles to soil nutrient availability and herbage N uptake from poultry manure

Ghulam Abbas Shah / Jahangir Ahmed / Zahid Iqbal / Fayyaz-ul- Hassan / Muhammad Imtiaz Rashid

Scientific Reports, Vol 11, Iss 1, Pp 1-

2021 Volume 13

Abstract: Abstract Recently, there is an increasing trend of using metallic nanoparticles (NPs) in agriculture due to their potential role in remediating soil pollution and improving nutrient utilization from fertilizers. However, evidence suggested that these NPs ...

Abstract	Abstract Recently, there is an increasing trend of using metallic nanoparticles (NPs) in agriculture due to their potential role in remediating soil pollution and improving nutrient utilization from fertilizers. However, evidence suggested that these NPs were toxic to the soil life and their associated functions, and this toxicity depended on their dose, type, and size. Here, a dose-dependent (5, 50, and 100 mg kg−1 soil) toxicity of NiO NPs on poultry manure (PM: 136 kg N ha−1) decomposition, nutrient mineralization, and herbage N uptake were studied in a standard pot experiment. The NPs doses were mixed with PM and applied in soil-filled pots where then ryegrass was sown. Results revealed that the lowest dose significantly increased microbial biomass (C and N) and respiration from PM, whereas a high dose reduced these parameters. This decrease in such parameters by the highest NPs dose resulted in 13 and 41% lower soil mineral N and plant available K from PM, respectively. Moreover, such effects resulted in 32 and 35% lower herbage shoot and root N uptakes from PM in this treatment. Both intermediate and high doses decreased herbage shoot Ni uptake from PM by 33 and 34%, respectively. However, all NPs doses did not influence soil Ni content from PM. Hence, our results indicated that high NPs dose (100 mg kg−1) was toxic to decomposition, nutrient mineralization, and herbage N uptake from PM. Therefore, such NiONPs toxicity should be considered before recommending their use in agriculture for soil remediation or optimizing nutrient use efficiency of fertilizers.
Keywords	Medicine ; R ; Science ; Q
Subject code	630
Language	English
Publishing date	2021-06-01T00:00:00Z
Publisher	Nature Portfolio
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Determination of stable safflower genotypes in variable environments by parametric and non-parametric methods

Obaid Afzal / Fayyaz-ul Hassan / Mukhtar Ahmed / Ghulam Shabbir / Shakeel Ahmed

Journal of Agriculture and Food Research, Vol 6, Iss , Pp 100233- (2021)

2021

Abstract: Grain yield stability measurements under varied environmental conditions suggests selection of suitable genotype. Safflower genotypes having different origins were tested for G x E effects on yield using univariate and multivariate statistics in six test ...

Abstract	Grain yield stability measurements under varied environmental conditions suggests selection of suitable genotype. Safflower genotypes having different origins were tested for G x E effects on yield using univariate and multivariate statistics in six test environments (three varied climate conditions and combination of years) during 2016–17 and 2017–18. Genotypes were classified as stable or unstable based on multiple stability measures. Comparative yield results reveals different genotypic grain yield response in each environment. High yield (1618.4 kg ha−1) performance and responsiveness of PI-16308 genotype to favorable environment and lowest 1419 kg ha−1 was observed for PI-26748. In lieu of varied climatic condition Env4 showed 37% extra grain yield compared to Env3.The PCA results placed Env1, Env3 and Env5 in one group for producing similar grain yield and rest of the environments showed highest variation. Results of parametric (S2di) and non-parametric (S⁽3), S⁽⁶⁾, NP⁽1⁾, NP⁽2⁾, NP⁽3⁾ & NP⁽⁴⁾) measures indicates that PI-16308 and PI-16315 can be used to improve stability. However, Wricke's ecovalence (Wi2), Shukla's stability variance (σi2), θi, θ(i), S⁽1⁾ and S⁽2⁾ could be considered for improving grain yield of PI-26748 genotype.
Keywords	Safflower ; Adaptability ; Stability measures ; Genotype x environment interaction ; Agriculture (General) ; S1-972 ; Nutrition. Foods and food supply ; TX341-641
Subject code	500 ; 669
Language	English
Publishing date	2021-12-01T00:00:00Z
Publisher	Elsevier
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Response of spring wheat (Triticum aestivum L.) quality traits and yield to sowing date.

Mukhtar Ahmed / Fayyaz-ul-Hassan

PLoS ONE, Vol 10, Iss 4, p e

2015 Volume 0126097

Abstract	The unpredictability and large fluctuation of the climatic conditions in rainfed regions do affect spring wheat yield and grain quality. These variations offer the opportunity for the production of better quality wheat. The effect of variable years, locations and sowing managements on wheat grain yield and quality was studied through field experiments using three genotypes, three locations for two years under rainfed conditions. The two studied years as contrasting years at three locations and sowing dates depicted variability in temperature and water stress during grain filling which resulted considerable change in grain yield and quality. Delayed sowing, years (2009-10) and location (Talagang) with high temperature and water stress resulted increased proline, and grain quality traits i.e. grain protein (GP) and grain ash (GA) than optimum conditions (during 2008-09, at Islamabad and early sowing). However, opposite trend was observed for dry gluten (DG), sodium dodecyl sulphate (SDS), SPAD content and grain yield irrespective of genotypes. The influence of variable climatic conditions was dominant in determining the quality traits and inverse relationship was observed among some quality traits and grain yield. It may be concluded that by selecting suitable locations and different sowing managements for subjecting the crop to desirable environmental conditions (temperature and water) quality traits of wheat crop could be modified.
Keywords	Medicine ; R ; Science ; Q
Subject code	669
Language	English
Publishing date	2015-01-01T00:00:00Z
Publisher	Public Library of Science (PLoS)
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Impact of Nitrogen Addition on Physiological, Crop Total Nitrogen, Efficiencies and Agronomic Traits of the Wheat Crop under Rainfed Conditions

Umara Qadeer / Mukhtar Ahmed / Fayyaz-ul -Hassan / Muhammad Akmal

Sustainability, Vol 11, Iss 22, p

2019 Volume 6486

Abstract: Optimizing nitrogen (N) application timings and rate can improve nutrient uptake and nutrient efficiencies in wheat, particularly under rainfed conditions. Climatic stress in the form of high temperature and drought resulted in the decreased crop ... ...

Abstract	Optimizing nitrogen (N) application timings and rate can improve nutrient uptake and nutrient efficiencies in wheat, particularly under rainfed conditions. Climatic stress in the form of high temperature and drought resulted in the decreased crop physiological traits, hastened maturity and, ultimately, caused lower grain yield. The impact of N application rates as full and split dose at three diverse locations of rainfed Pothwar, Pakistan was studied through field experiments for two years (2013−14 and 2014−15). Treatments include T 1 = control (no fertilizer applied), full dose of N applied at the time of crop sowing, i.e., T 2 = 50 kg N ha −1 , T 3 = 100 kg N ha −1 and T 4 = 150 kg N ha −1 , and split application of N at different timings at different stages of the crop, called split application of N, i.e., T 5 : application of 50 kg N ha −1 (15 kg N ha −1 (sowing, BBCH (Biologische Bundesanstalt Bundessortenamt und Chemische Industrie) 0): 20 kg N ha −1 (tillering, BBCH20): 15 kg N ha −1 (anthesis, BBCH 60), T 6 : application of 100 kg N ha −1 (30 kg N ha −1 (sowing, BBCH 0): 40 kg N ha −1 (tillering, BBCH 20): 30 kg N ha −1 (anthesis, BBCH 60) and T 7 : application of 150 kg N ha −1 (45 kg N ha −1 (sowing, BBCH 0): 60 kg N ha −1 (tillering, BBCH 20): 45 kg N ha −1 (anthesis, BBCH 60). The three study sites were Islamabad (high rainfall with optimum temperature), University Research Farm (URF)-Chakwal Road, Koont (medium rainfall with moderate temperature), and Talagang (low rainfall with high temperature). Results revealed that the highest stomatal conductance (0.80 mole H 2 O m −2 s −1 ), net photosynthetic rate (20.07 μmole CO 2 m −2 s −1 ), transpiration rate (9.58 mmole H 2 O m −2 s −1 ), intercellular CO 2 concentration (329.25 μmole CO 2 mol −1 air), SPAD values (58.86%) and proline contents (35.42 μg g −1 ) were obtained from split application of N (T 6 = split N 100 ) compared to control and full dose N treatments. Among the sites, these physiological traits remained highest at Islamabad and lowest at Talagang, while between the years, the maximum values of the measured parameters were obtained during 2013−14. A similar trend was observed for crop total N, N efficiencies, and agronomic traits of the crop. The results suggested that the optimum N application rate at appropriate timings can help to harvest the real benefits of N. The split dose resulted in the maximum performance of the crop from the physiological parameters to the agronomic traits of the crop.
Keywords	climate ; rainfed wheat ; n fertilization ; split and full n application ; photosynthetic rate ; agronomic traits ; Environmental effects of industries and plants ; TD194-195 ; Renewable energy sources ; TJ807-830 ; Environmental sciences ; GE1-350
Language	English
Publishing date	2019-11-01T00:00:00Z
Publisher	MDPI AG
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Allometric dynamics of Sinapis alba under different ecological conditions

Ghulam Muhammad / Abdul Manaf / Fayyaz-ul-Hassan / Azeem Khalid / Ahmad Sher / Carol J. Lovatt / Asad Syed / Ali H. Bahkali / Abdallah M. Elgorban / Abdul Qayyum

Journal of King Saud University: Science, Vol 35, Iss 1, Pp 102403- (2023)

1480

Abstract: Objectives: The indigenous oilseed crops are facing the problems of insects, diseases attack with poor yield potential. Canola needs high water requirement and also > 50 % shattering losses. Therefore, farmers are compelled to cultivate alternative crops. ...

Abstract	Objectives: The indigenous oilseed crops are facing the problems of insects, diseases attack with poor yield potential. Canola needs high water requirement and also > 50 % shattering losses. Therefore, farmers are compelled to cultivate alternative crops. Sinapis alba is the best replacement of winter rapeseed due to superior phenotypic plasticity for dry temperate climate like Pakistan Pertinent sowing time augments the soil and climatic resources efficiency in a specific ecological zone to expose various phenological stages for appropriate growth and development to achieve potential yield. Methods: Field experiments were performed to appraise the suitable sowing date at three locations (NARC, SAWCRI and Talagang) in Pothwar plateau of Pakistan. Six sowing dates from 1st October up to 15th December with fifteen days interval were quart replicated in RCBD during two 2017–18 and 2018–19. Explicated environment of various locations prudently influenced Sinapis alba performance and yield attributes to accomplish potential yield during both years. Among sowing dates, 15th October enormously promoted morphological development to attained maximum mean values of pods plant−1, 1000-seed weight, biological yield and seed yield. Among locations, SAWCRI nurtured highest number of plants−2, plant height, primary and secondary branches, pods plant−1, seed pod-1, 1000-seed weight, biological yield and seed yield. Variability in Agro-meteorological indices of three locations significantly influenced the interactive effect of year × location × sowing dates for growth and yield attributes of Sinapis alba. It was observed that 15th October sowing at SAWCRI attained 2.25 t ha−1 seed yield that was 10.9 % and 24.4 % higher from the optimal dates at NARC and Talagang that accomplished 84.43 %. 91.12 % and 95.76 % more yield from the delayed (15th Dec) sowing at three locations. Conclusion: Better coordination of soil and climatic conditions with 15th October sowing for growth and development signified the monumental importance of ...
Keywords	Sinapis alba ; Sowing dates ; Environments ; Morphology ; Yield ; Science (General) ; Q1-390
Subject code	580
Language	English
Publishing date	2023-01-01T00:00:00Z
Publisher	Elsevier
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Nitrogen Fertilization Improves the Agro-Morphological and Yield Attributes of Sinapis alba L.

Ehsan Ul Haq / Fayyaz Ul Hassan / Fanrui Zhou / Xiaomin Gong / Abdul Manaf / Ghulam Shabbir / Muhammad Fazal Karim / Patricia Jie Hung King / Muhammad Faheem Adil / Imran Haider Shamsi

Agronomy, Vol 13, Iss 1621, p

2023 Volume 1621

Abstract: Oilseed crops play a vital role in the economy of Pakistan, yet the production of oilseeds is far less than the demand for them. White mustard ( Sinapis alba L.) is an emerging crop, that belongs to the Brassicaceae family. It is considered to be an ... ...

Abstract	Oilseed crops play a vital role in the economy of Pakistan, yet the production of oilseeds is far less than the demand for them. White mustard ( Sinapis alba L.) is an emerging crop, that belongs to the Brassicaceae family. It is considered to be an alternative to all other oilseed crops for dry temperate climates. White mustard develops rapidly, and has a large canopy and deep rooting system; hence, it can draw up nutrients from deeper layers. This study aimed to evaluate the influence of nitrogen on S. alba agro-morphological attributes and enhance nutrient use efficiencies. During the Rabi seasons of 2019-20 and 2020-21, an experiment was conducted at the University Research Farm, Chakwal Road, Rawalpindi. The study included seven treatments, i.e., T1-Control, T2-20, T3-40, T4-60, T5-80, T6-100, and T7-120 kg·ha −1 . Each treatment was replicated three times, and the study utilized a randomized complete block design (RCBD). The results revealed that nitrogen at 100 kg·ha −1 was the optimal concentration and significantly increased the agro-morphological parameters, i.e., plant height (47.01%), primary branches (41.36%), secondary branches (45.33%), 1000 seed weight (54.35%), siliques/plant (41.57%), seeds/silique (52.30%) biological yield (68.38%), seed yield (54.90%), harvest index (11%), and oil yield (38.84%), as compared to the control. Moreover, protein contents and oil contents were significantly increased (5.15% and 6%, respectively), as compared to the control, while glucosinolate content was decreased (4.36%). Similarly, maximum agronomic efficiency (AE), apparent recovery efficiency (ARE) (53%), physiological efficiency (PE), and nutrient use efficiency (NUE) were also improved, as compared to the control. Hence, N application at a concentration of 100 kg·ha −1 can be recommended for S. alba under the present cropping system of Pothwar.
Keywords	agronomic efficiency ; fertilizer application ; oil contents ; white mustard ; yield ; Agriculture ; S
Subject code	630
Language	English
Publishing date	2023-06-01T00:00:00Z
Publisher	MDPI AG
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Cumulative Effect of Temperature and Solar Radiation on Wheat Yield

Mukhtar AHMED / Fayyaz-ul HASSAN

Notulae Botanicae Horti Agrobotanici Cluj-Napoca, Vol 39, Iss 2, Pp 146-

2011 Volume 152

Abstract: The impact of temperature and solar radiations were studied as determinant factor for spring wheat grain yield. The data obtained at anthesis and maturity for grain number (GN), grain weight (GW) and grain yield (Y) were examined with mean temperature at ...

Abstract	The impact of temperature and solar radiations were studied as determinant factor for spring wheat grain yield. The data obtained at anthesis and maturity for grain number (GN), grain weight (GW) and grain yield (Y) were examined with mean temperature at anthesis (T1) and maturity (T2), solar radiation at anthesis (SR1) and maturity (SR2) and photothermal quotient (PTQ) at anthesis (PTQ1) and maturity (PTQ2). The data obtained was subjected to Statistica 8 software and scatter plot regression model was developed at 95% confidence interval with crop data and climate variables (T1, T2, SR1, SR2, PTQ1 and PTQ2). Results clearly indicated that yield remained directly proportional to solar radiation and temperature plus solar radiation (PTQ) while inversely to temperature under optimum other environmental resources. Direct relationship between PTQ and yield parameters confirmed that it determined crop yield and its management for variable environmental conditions need to be opted by adopting suitable sowing time as an adaptation strategy under changing climate.
Keywords	Forestry ; SD1-669.5 ; Agriculture (General) ; S1-972
Subject code	669
Language	English
Publishing date	2011-11-01T00:00:00Z
Publisher	AcademicPres
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article: Improvement of wheat (Triticum aestivum) drought tolerance by seed priming with silicon

Ahmed, Mukhtar / Qadeer, Umara / Ahmed, Zammurad Iqbal / Fayyaz-ul Hassan

Archives of agronomy and soil science

2016 Volume 62, Issue 1/3, Page(s) 299

Language	English
Document type	Article
ZDB-ID	1132910-5
ISSN	0365-0340
Database	Current Contents Nutrition, Environment, Agriculture

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