Influence of nitrogen rates and row spacing on corn yield, protein content, and other plant parameters

Ülger, Ahmet; Ibrikçi, H.; Çakir, Bülent; Güzel, Nuri

doi:10.1080/01904169709365368

Cited by 17 publications

(10 citation statements)

References 20 publications

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“…Grain yield was higher with 0.51‐ vs. 0.76‐m row spacing in 1996 and 1997, but not in 1998. The increased yield with 0.51‐m spacing is supported by the findings of others who have reported yield increases of up to 10% with reduced row spacing (Hodges and Evans, 1990; Polito and Voss, 1991; Porter et al, 1997; Ulger et al, 1997; Widdicombe and Thelen, 2002). High yields can be achieved with 0.76‐m row spacing, however, as was the case in 1998 when grain yields were higher than in previous years and the main effect of row spacing was not significant.…”

Section: Resultssupporting

confidence: 74%

Corn Response to Nitrogen Rate, Row Spacing, and Plant Density in Eastern Nebraska

2006

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Efficient use of N by corn (Zea mays L.) is financially and environmentally important, and may be improved with higher plant density and reduced row spacing. Hypotheses were tested that irrigated corn yield in northeast Nebraska is increased by reducing row spacing from 0.76 m and increasing plant density above 61 800 plants ha 21 , and that grain yield response to applied N is greater with reduced row spacing and increased plant density. Field experiments were conducted for 3 yr comparing the effects 0.76-vs. 0.51-m row spacing, three plant densities, and four N rates on crop performance. The soil was a silty clay loam (mesic Cumulic Haplustoll). Nitrogen rates ranged from 0 to 252 kg N ha 21 . Plant N concentration and biomass and grain yield were not affected by plant density. Decreasing row spacing from 0.76 to 0.51 m resulted in 4% more grain yield. Grain yield response to applied N and N rates for optimum yield were not affected by row spacing. Nitrogen application resulted in mean increases of 22% more biomass production and 24% more grain yield. The N response function was linear in 1996, quadratic in 1997, and quadratic with decreased yields at the high N rate (252 kg N ha 21 ) in 1998. Grain yield was not affected by increasing plant density above 61 800 plants ha 21 but was greater with narrow row spacing. Yield response to applied N was similar for all planting arrangements. Optimal N rate cannot be better predicted by considering plant density and row spacing.

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Section: Resultssupporting

confidence: 74%

Corn Response to Nitrogen Rate, Row Spacing, and Plant Density in Eastern Nebraska

2006

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“…The pH of the homogenized pulp was determined using pH meter. The total pulp N was determined by a semi micro-kjeldahl procedure (Bremner, 1965;Ulger et al, 1997) and fruit protein was calculated from the Kjeldahl nitrogen using the conversion factor 6.25. Crude fibre content was estimated from the loss in weight of the crucible and its content on ignition.…”

Section: Methodsmentioning

confidence: 99%

Impact of organic and inorganic fertilizers on growth, fruit yield, nutritional and lycopene contents of three varieties of tomato (Lycopersicon esculentum (L.) Mill) in Ogbomoso, Nigeria

Ilupeju¹,

Akanbi²,

Olaniyi³

et al. 2015

Afr. J. Biotechnol.

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Field experiments were carried out to assess the impact of 100% NPK fertilizer recommendation (300 kg NPK 20:10:10), 100% Tithonia compost (TC), 75% NPK + 25% TC, 50% NPK + 50% TC, 25% NPK + 75% TC and control (non-fertilized plant) on the growth, fruit yield, nutritional and lycopene contents of three tomato varieties (Raoma VF; Ogbomoso local and Califonia wonder). The experiment was a split plot fitted into a randomized complete block design replicated three times. Data were collected on growth and reproductive parameters, fruit and seed attributes, and fruit proximate and nutritional contents. Data collected were subjected to analysis of variance to determine significant means. Significant varietal differences were observed among the tomato varieties in terms of growth, fruit yield and nutritional attributes. The plant dry matter yield was highest in Ogbomoso local and least in Roma VF. Fruit yield obtained with Ogbomoso local was 45 and 56% higher than what was obtained for Roma VF and Califonia wonder, respectively. In terms of vitamin C content, Roma VF fertilized with 50% NPK + 50% TC gave the highest value which is 23 to 67% higher than values obtained from the other treatment combinations. Again, irrespective of variety, organically grown tomato contains higher content of lycopene. It was also observed that the higher the proportion of TC compost in the treatments, the better the lycopene content. It could be concluded that the use of organic fertilizer has potential in improving the growth, fruit yield and nutritional contents of any of the three tomato varieties studied.

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“…Conflicting performance ratings of N calibration seen in Figures 4 and 5 might be attributed to above mentioned two drivers. In addition, routine fertilizer applications are exceedingly high than the recommended levels, i.e., 380 kg N ha −1 is applied to corn while only 240 kg N ha −1 is the expert recommendation for corn in the region [63]. This results in high potential for nitrogen leaching (Figure 6).…”

Section: Calibration Of Nitrogen In Drainage Watermentioning

confidence: 99%

Modeling Agricultural Land Management to Improve Understanding of Nitrogen Leaching in an Irrigated Mediterranean Area in Southern Turkey

Karnez¹,

Sagir²,

Gavan³

et al. 2017

Water Quality

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Nitrogen (N) cycle dynamics and its transport in the ecosystem were always an attracting subject for the researchers. Calculation of N budget in agricultural systems with use of different empirical statistical methods is common practice in OECD and EU countries. However, these methodologies do not include climate and water cycle as part of the process. On the other hand, big scale studies are labor and work intensive. As a solution, various computer modeling approaches have been used to predict N budget and related N parameters. One of them is internationally established Soil and Water Assessment (SWAT) model, which was developed especially for modeling agricultural catchments. The aim of this study was to improve understanding of N leaching with simulation of agricultural land management (fertilization, irrigation, and plant species) in hydrological heavily modified watershed with irrigation-depended agriculture under Mediterranean climate. The study was conducted in Lower Seyhan River Plain Irrigation District (Akarsu) of 9495 ha in Cukurova region of southern Turkey. Intensive and extensive water and nitrogen monitoring data (2008)(2009)(2010)(2011)(2012)(2013)(2014), soil properties, cropping pattern, and crop rotation were used for the SWAT model build, calibration, and validation of the model.

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Influence of nitrogen rates and row spacing on corn yield, protein content, and other plant parameters

Cited by 17 publications

References 20 publications

Corn Response to Nitrogen Rate, Row Spacing, and Plant Density in Eastern Nebraska

Corn Response to Nitrogen Rate, Row Spacing, and Plant Density in Eastern Nebraska

Impact of organic and inorganic fertilizers on growth, fruit yield, nutritional and lycopene contents of three varieties of tomato (Lycopersicon esculentum (L.) Mill) in Ogbomoso, Nigeria

Modeling Agricultural Land Management to Improve Understanding of Nitrogen Leaching in an Irrigated Mediterranean Area in Southern Turkey

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