Effect of Nitrogen on Growth, Quality, and Yield of Irrigated Wheat in West Pakistan<sup>1</sup>

Wahhab, A.; Hussain, Ibrar

doi:10.2134/agronj1957.00021962004900030003x

Cited by 12 publications

(10 citation statements)

References 2 publications

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“…Potash application increased the nitrogen content in teff biomass (Table 4) though significant (P < 0.01) increments in nitrogen concentration due to K level were observed only at 3 locations. This could be attributed to imbalance between N and K as also reported by Wahhab and Hussain (1957). Crop response to applied nitrogen fertilizers decreases when the exchangeable potassium content of a soil is below the optimal level and vice versa (Rutkowska et al, 2014;Pradhan et al, 2015).…”

Section: Effect Of K Application On Nutrient Concentrations In Teff Tmentioning

confidence: 53%

Effect of potassium levels on teff (Eragrostis tef (Zucc.) Trotter) growth and yield in Central Highland Vertisols of Ethiopia

Demiss¹,

Mamo²,

Beyene³

et al. 2020

Eurasian Journal of Soil Science (Ejss)

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Nutrient depletion and imbalance are among the major attributes that contribute to declining soil productivity in the highlands of Ethiopia. The blanket fertilizer recommendation, which considered only urea and Di-ammonium phosphate (DAP), was used over the past four decades to improve soil fertility for enhancing crop production. Nevertheless, the average national yields of small cereal including teff were low, despite application of nitrogen and phosphorus (NP) fertilizers. On-farm trials were conducted in the 2015/16 and 2016/17 cropping seasons at 18 locations on Ethiopian highland Vertisols to determine the response of teff to potassium (K) fertilization along with other limiting nutrients. Five K levels (0, 30, 60, 90 and 120 kg ha-1) in the form of murate of potash (KCl) were used in randomized complete block design with three replications. Separate analysis of variance was conducted for each sites and year. Least Significant Difference (LSD) test at P ≤ 0.05 was used to separate means whenever there were significant differences. Analysis of variance revealed a highly significant difference (P < 0.01) between treatments in both straw and grain yields and tissue nitrogen (N) and K concentrations of teff over the twocropping seasons in 67% of the test locations. Additionally, responses to K were obtained on soils with available K test ranging between 166 and 282 mg kg-1. The Ca: K and Mg: K ratios were strongly and negatively correlated with relative yield and the correlations suggest that soil with Ca: K > 50:1 and Mg: K >15:1 are likely to respond to potassium fertilization. The yield advantage accrued due to K application ranged from 30 to 77% in 2015/16 and 8 to 51% in 2016/17 seasons. The economic optimum K fertilizer application rates varied between 60 kg K ha-1 in 44% of the sites to 90 kg K ha-1 in 23% of the sites. The findings highlighted the need for revisiting fertilizer program to enhance the yield and nutrient uptake of teff in K responsive soils and developing critical levels for K in the study sites.

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Section: Effect Of K Application On Nutrient Concentrations In Teff Tmentioning

confidence: 53%

Effect of potassium levels on teff (Eragrostis tef (Zucc.) Trotter) growth and yield in Central Highland Vertisols of Ethiopia

Demiss¹,

Mamo²,

Beyene³

et al. 2020

Eurasian Journal of Soil Science (Ejss)

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“…S UPPLEMENTAL water and nitrogen usually increase the yield of small grains. Pope (2) and Wahhab and Hussain ( 7) attempted to show the effects of varying the time of N applications on yield and certain plant characteristics. 'Working with wheat, Asana et al ( 1) determined the effects of soil moisture deficits in a fine-textured soil during various stages of gfowth.…”

mentioning

confidence: 99%

Barley Production as Influenced by Timing of Soil Moisture and Timing of Nitrogen Applications¹

Schreiber¹,

Stanberry

1965

Agronomy Journal

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Synopsis Low moisture tensions during pollination increased yield and during internode elongation increased spikes per plant and kernels per spike. Compared with 60 pounds of N per acre, 240 pounds increased spikes per plant, kernels per spike, and yield. N applications only at planting resulted in increased kernels per spike, kernel weight and yield, but decreased spikes per plant. Later applications in conjunction with planting applications resulted in further increases of spikes per plant and kernel weight.

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“…Available soil nitrogen has been shown to be an important factor limiting wheat yields in many parts of the world (1,12,14,20). The efficiency of nitrogen applications in increasing wheat yields is largely dependent upon the available soil moisture supply during the growing season (9,13,18).…”

mentioning

confidence: 99%

“…An increase in available soil nitrogen has generally been found associated with an increase in protein content of the wheat grain ( 5,8,10,20,21). The closer the time of the nitrogen application to the beginning of flowering, the greater the effect of a given amount of nitrogen in increasing the percentage of protein in the grain (10,20,21). Production of high protein wheat is generally associated with conditions where soil moisture is the principal yieldlimiting factor (2,13).…”

mentioning

confidence: 99%

Yield and Protein Content of Wheat in Central Mexico as Affected by Available Soil Moisture and Nitrogen Fertilization¹

Fernández¹,

Laird

1959

Agronomy Journal

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Synopsis Owing to soil moisture differences, grain yields were increased by 85% and straw yields by 187% in heavily fertilized wheat. Maintenance of the available soil moisture percentage above 30 was necessary for maximum grain yields. The protein content of the whole grain was decreased by small applications of nitrogen and was increased by large applications. Protein content was lowest in the wettest treatment and highest in the driest treatment.

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Effect of Nitrogen on Growth, Quality, and Yield of Irrigated Wheat in West Pakistan¹

Cited by 12 publications

References 2 publications

Effect of potassium levels on teff (Eragrostis tef (Zucc.) Trotter) growth and yield in Central Highland Vertisols of Ethiopia

Effect of potassium levels on teff (Eragrostis tef (Zucc.) Trotter) growth and yield in Central Highland Vertisols of Ethiopia

Barley Production as Influenced by Timing of Soil Moisture and Timing of Nitrogen Applications¹

Yield and Protein Content of Wheat in Central Mexico as Affected by Available Soil Moisture and Nitrogen Fertilization¹

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Effect of Nitrogen on Growth, Quality, and Yield of Irrigated Wheat in West Pakistan1

Cited by 12 publications

References 2 publications

Effect of potassium levels on teff (Eragrostis tef (Zucc.) Trotter) growth and yield in Central Highland Vertisols of Ethiopia

Effect of potassium levels on teff (Eragrostis tef (Zucc.) Trotter) growth and yield in Central Highland Vertisols of Ethiopia

Barley Production as Influenced by Timing of Soil Moisture and Timing of Nitrogen Applications1

Yield and Protein Content of Wheat in Central Mexico as Affected by Available Soil Moisture and Nitrogen Fertilization1

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Effect of Nitrogen on Growth, Quality, and Yield of Irrigated Wheat in West Pakistan¹

Barley Production as Influenced by Timing of Soil Moisture and Timing of Nitrogen Applications¹

Yield and Protein Content of Wheat in Central Mexico as Affected by Available Soil Moisture and Nitrogen Fertilization¹