U.S. West: Foliar‐applied nitrogen fertilizers in spring wheat production

Walsh, Olga S.; Christiaens, Robin J.; Pandey, Arjun

doi:10.2134/cs2013-46-4-8

Cited by 4 publications

(5 citation statements)

References 15 publications

(15 reference statements)

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“…Liquid fertilizers are easily transported, stored, and calibrated for precise application [20]. Compared to a mix created by combining several dry fertilizers, blending of liquid products results in a much more homogeneous mixture, where each drop has the uniform analysis [21]. The higher production cost of fluid fertilizers due to higher energy requirements may be balanced by higher efficiency resulting from a more consistent and uniform application [13].…”

Section: Introductionmentioning

confidence: 99%

“…The higher production cost of fluid fertilizers due to higher energy requirements may be balanced by higher efficiency resulting from a more consistent and uniform application [13]. The analysis of US fertilizer market share has shown that the utilization of liquid fertilizers is on the increase compared to dry fertilizer sources [21,22]. The success of liquid fertilizers in corn production suggests that they will be of benefit in small grain cereals as well [23].…”

Section: Introductionmentioning

confidence: 99%

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Relative Efficacy of Liquid Nitrogen Fertilizers in Dryland Spring Wheat

Walsh

Christiaens

2016

International Journal of Agronomy

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The study was conducted in 2012 and 2013 at three locations in North Central and Western Montana (total of 6 site-years) to evaluate the relative efficacy of three liquid nitrogen (N) fertilizer sources, urea ammonium nitrate (UAN, 32-0-0), liquid urea (LU, 21-0-0), and High NRGN (HNRGN, 27-0-0-1S), in spring wheat (Triticum aestivumL.). In addition to at-seeding urea application at 90 kg N ha−1to all treatments (except for the unfertilized check plot), the liquid fertilizers were applied utilizing an all-terrain vehicle- (ATV-) mounted stream-bar equipped sprayer at a rate of 45 kg N ha−1at Feekes 5 growth stage (early tillering). Three dilution ratios of fertilizer to water were accessed: 100/0 (undiluted), 66/33, and 33/66. The effects of N source and the dilution ratio (fertilizer/water) on N uptake (NUp), N use efficiency (NUE), spring wheat grain yield (GY), grain protein (GP) content, and protein yield (PY) were assessed. The dilution ratios had no effect on GY, GP, PY, NUp, and NUE at any of the site-years in this study. Taking into account agronomic and economic factors, LU can be recommended as the most suitable liquid N fertilizer source for spring wheat cropping systems of the Northern Great Plains.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Relative Efficacy of Liquid Nitrogen Fertilizers in Dryland Spring Wheat

Walsh

Christiaens

2016

International Journal of Agronomy

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“…First, the model explains in detail why carbon dioxide stimulates plant growth inside greenhouses [57], and also explains why the beneficial effect saturates at high concentration (the bicarbonate ions simply fill all the available ligand sites in the nonheme iron complexes). Second, the model explains why concentrated nitrate fertilizer may be safely applied to plant roots but not to plant leaves (on leaves, the nitrate ions block photosynthesis, leading to "leaf burn" [58]). Third, the model explains why large-scale cyanide fishing "bleaches" coral reefs in many tropical regions of the world [59] (the cyanide ions powerfully inhibit photosynthesis in the symbiotic algae [species zooxanthellae] that are needed for coral production).…”

Section: Discussionmentioning

confidence: 99%

Discovery of a single molecule transistor in photosystem II

Fletcher

2014

J Solid State Electrochem

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Quantum theory is used to rationalize the results of recent high precision x-ray diffraction studies of photosystem II. It is proposed that a single molecule transistor regulates the flow of electrons through this remarkable system. At the core of the device, electrons flow through an iron(II) d-orbital by a process of superexchange, at a rate which is gated by the ambient ligand field. The transistor operates in the negative feedback mode, and its existence suggests that man-made molecular logic gates are technologically feasible. We believe this is the first recorded example of a single molecule electronic transistor in a living system.

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“…Invariably, the efficacy was influenced by the fertilization time, supplied late during the crop growth. Foliar N applications are readily available for crops, due to the leaf absorption [77]. Moreover, N supplied later in the vegetative season may be more efficiently stored in the grains and less in the vegetative parts [78].…”

Section: Crop Yield and N Content Under Different Fertilizer Sources ...mentioning

confidence: 99%

Short-term Response of Greenhouse Gas Emissions from Precision Fertilization on Barley

et al. 2022

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Precision fertilization is a promising mitigation strategy to reduce environmental impacts of N-fertilization, but the effective benefits of variable-rate fertilization have not yet been fully demonstrated. We evaluated the short-term response (23 days) of GHGs emissions following variable-rate fertilization on barley. Yields, biomass (grains + straw) and different N-use indicators (N uptake, grain protein concentration, recovery efficiency, physiological efficiency, partial factor productivity of applied nutrient, agronomic efficiency and N surplus) were compared. Four N fertilization treatments were performed: (i) conventional– 150 kg ha−1; (ii) variable with granular fertilizer; (iii) variable with foliar liquid supplement; (iv) no fertilization. According to proximal sensing analysis (Greenseeker Handheld) and crop needs, both variable-rate treatments accounted for 35 kg N ha−1. Cumulative GHGs emissions were not significantly different, leading to the conclusion that the sensor-based N application might not be a GHGs mitigation strategy in current experimental conditions. Results showed that both site-specific fertilizations ensured the maintenance of high yields with a significant N rate reduction (approximately by 75%) and a N use improvement. Variable-rate N fertilization, due to similar yields (~6 tons ha−1) than conventional fertilization and higher protein content in foliar treatment (14%), confirms its effectiveness to manage N during the later phases of growing season.

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U.S. West: Foliar‐applied nitrogen fertilizers in spring wheat production

Cited by 4 publications

References 15 publications

Relative Efficacy of Liquid Nitrogen Fertilizers in Dryland Spring Wheat

Relative Efficacy of Liquid Nitrogen Fertilizers in Dryland Spring Wheat

Discovery of a single molecule transistor in photosystem II

Short-term Response of Greenhouse Gas Emissions from Precision Fertilization on Barley

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