Presidedress Soil Nitrate Test Evaluation in Maryland

Meisinger, J. J.; Bandel, V. A.; Angle, J. S.; O'Keefe, B. E.; Reynolds, C. M.

doi:10.2136/sssaj1992.03615995005600050032x

Cited by 115 publications

(94 citation statements)

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“…The pre-sidedress nitrate test has proven useful for improving fertilizer N recommendations in the humid eastern United States for corn grown on land receiving manure, and where legumes have been grown in the rotation (Andraski and Bundy, 2002;Evanylo and Alley, 1997;Meisinger et al, 1992a;Roth et al, 1992;Sims et al, 1995). In most states, the maximum amount of pre-plant N fertilizer recommended where the pre-sidedress nitrate test will be used is 22 to 34 kg N ha -1 .…”

Section: Pre-sidedress Nitrate Testmentioning

confidence: 99%

Strengths and Limitations of Nitrogen Rate Recommendations for Corn and Opportunities for Improvement

et al. 2018

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A gronomy J our n al • Volume 110 , I ssue 1 • 2 018 1 T he goal of an N recommendation system is to accurately estimate the gap between the N provided by the soil and the N required by the plant. Accurately estimating this gap depends on the ability of the recommendation system to accurately estimate fi eld or subfi eld specifi c economically optimal nitrogen rates (EONR). Current recommendation systems are not as accurate as needed to provide consistently reliable estimates of N needs across years at the fi eld or subfi eld scale. Uncontrollable factors like temperature, rainfall timing, intensity and amount, and interactions of temperature and rainfall with factors such as N source, timing and placement, plant genetics, and soil characteristics combine to make N rate recommendations for an individual fi eld or rates for subfi elds a process guided as much by science as by the best professional judgement of farmers and farm advisors.Substantial evidence has accumulated that EONRs can vary widely across fi elds, within fi elds and over years in the same fi eld for a wide range of crops and geographies. Examples ABSTRACTNitrogen fi xation by the Haber-Bosch process has more than doubled the amount of fi xed N on Earth, signifi cantly infl uencing the global N cycle. Much of this fi xed N is made into N fertilizer that is used to produce nearly half of the world's food. Too much of the N fertilizer pollutes air and water when it is lost from agroecosystems through volatilization, denitrifi cation, leaching, and runoff . Most of the N fertilizer used in the United States is applied to corn (Zea mays L.), and the profi tability and environmental footprint of corn production is directly tied to N fertilizer applications. Accurately predicting the amount of N needed by corn, however, has proven to be challenging because of the eff ects of rainfall, temperature, and interactions with soil properties on the N cycle. For this reason, improving N recommendations is critical for profi table corn production and for reducing N losses to the environment. Th e objectives of this paper were to review current methods for estimating N needs of corn by: (i) reviewing fundamental background information about how N recommendations are created; (ii) evaluating the performance, strengths, and limitations of systems and tools used for making N fertilizer recommendations; (iii) discussing how adaptive management principles and methods can improve recommendations; and (iv) providing a framework for improving N fertilizer rate recommendations.

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Section: Pre-sidedress Nitrate Testmentioning

confidence: 99%

Strengths and Limitations of Nitrogen Rate Recommendations for Corn and Opportunities for Improvement

et al. 2018

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“…Assessment of N credits from previous crops, organic inputs and soil organic matter is one of the more challenging aspects of N management. Evaluation of these N contributions to corn N needs in the northeastern USA is effectively performed by the presidedress nitrate test (PSNT), which measures soil nitrate after mineralization of organic N has begun (Magdoff et al 1984;Magdoff 1991;Meisinger et al 1992;Klausner et al 1993). Due to the mobility of nitrate in the soil, the test requires sampling to 0.3-m depth when the corn is 0.15-to 0.3-m tall, a particularly busy time on a dairy farm.…”

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confidence: 99%

Response of the Illinois Soil Nitrogen Test to liquid and composted dairy manure applications in a corn agroecosystem

Klapwyk¹,

Ketterings²,

Godwin³

et al. 2006

Can. J. Soil. Sci.

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Response of the Illinois Soil Nitrogen Test to liquid and composted dairy manure applications in a corn agroecosystem. Can. J. Soil Sci. 86: 655-663. Dairy manure is important for corn (Zea mays L.) production in New York. Optimizing corn yield while minimizing environmental loss with manure nutrients is often a challenge. A potential tool for improving N management is the Illinois Soil Nitrogen Test (ISNT), which estimates amino sugar N, a pool of potentially mineralizable N for corn uptake. The objectives of this study were to determine (1) the short-term effects of manure applications on ISNT-N, and (2) the longer-term impacts of annual additions of composted and liquid dairy manure on ISNT-N. A 6-wk incubation study showed that NH 4 -N from manure temporarily (< 2 wk) increased ISNT results. A 4-yr field study was conducted with annual spring applications of two rates of composted dairy manure (45 and 77 Mg ha -1 ) and two liquid dairy manure rates (63.5 and 180 kL ha -1 ). Results showed that ISNT-N slightly decreased over time in check plots (no manure or fertilizer additions) and that increases in ISNT-N over time in compost and liquid manure amended plots were consistent with changes in N credits currently given to manures in New York. Our results suggest that the ISNT accounts for N in previously applied compost and manure amendments, but that samples should not be taken within 2-wk following manure addition.

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“…Samples were analyzed for NO 3 -N and ammonium-N (NH 4 -N) using the potassium chloride extraction method (Maynard and Kalra 1993) and SOC using the method described by Tabatabi and Bremner (1970). Total soil mineral N availability was also calculated by adding NH 4 -N and NO 3 -N values as it has been suggested that the inclusion of both NH 4 -N and NO 3 -N may provide a better relationship between yield and soil N levels (Meisinger et al 1992). Site 1 and S2 were harvested on 2002 Aug. 05 and Aug. 1-2, respectively , using a plot combine (1.25 m wide), with a 6-m-long strip centred on each sampling point.…”

Section: Site Description and Experimental Designmentioning

confidence: 99%

Effect of nitrogen fertilization and topography on soft red winter wheat yield and protein content in two Ontario landscapes

Denys¹,

O’Halloran²,

Lauzon³

2006

Can. J. Soil. Sci.

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Presidedress Soil Nitrate Test Evaluation in Maryland

Cited by 115 publications

References 0 publications

Strengths and Limitations of Nitrogen Rate Recommendations for Corn and Opportunities for Improvement

Strengths and Limitations of Nitrogen Rate Recommendations for Corn and Opportunities for Improvement

Response of the Illinois Soil Nitrogen Test to liquid and composted dairy manure applications in a corn agroecosystem

Effect of nitrogen fertilization and topography on soft red winter wheat yield and protein content in two Ontario landscapes

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