nitrogen timing
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cftm ◽  
2020 ◽  
Vol 6 (1) ◽  
Author(s):  
T.S. Purucker ◽  
K. Steinke




2014 ◽  
Vol 92 (1) ◽  
pp. 71-78 ◽  
Author(s):  
Keith A. Kelling ◽  
Francisco J. Arriaga ◽  
Birl Lowery ◽  
Marian O. Jordan ◽  
Phillip E. Speth


2014 ◽  
Vol 12 (1) ◽  
pp. 1-6 ◽  
Author(s):  
Daniel W. Sweeney ◽  
Joseph L. Moyer




HortScience ◽  
2009 ◽  
Vol 44 (6) ◽  
pp. 1688-1693 ◽  
Author(s):  
Lois C. Braun ◽  
Jeffrey H. Gillman ◽  
Michael P. Russelle

Hybrids of Corylus avellana, C. americana and C. cornuta, are being developed as a potential crop for the Upper Midwest of the United States, but little is known about fertilizer nitrogen (N) management. We hypothesized that N application when the bushes were most fully leafed out would result in highest N uptake efficiency (NUE). We used 15N-labeled ammonium nitrate to measure NUE from soil applications in mid-April, late April, late May, early August, and mid-September. Nitrogen applied in either mid- or late April never comprised more than 5% of the total N in shoots or leaves, suggesting that N used for early leaf expansion came primarily from stored reserves. Applications made after April demonstrated that N was quickly translocated to rapidly growing plant parts: May applications comprised 9% of the N in leaves collected in July; August applications comprised 12% of the N in nut kernels collected in September; and September applications comprised 9% of N in catkins collected in October. Nitrogen applied in August and September appeared in new shoots the following April at higher levels than it did aboveground the previous October, showing that N applied late in the season may be stored belowground over the winter. NUE was highest for August and September applications at one site and August and mid-April applications at the other, implying that summer is generally the best time to apply N for most efficient uptake. However, overall NUE was low, only 5% for August applications, suggesting a need to develop other methods of improving NUE in hybrid hazelnuts.



2005 ◽  
Vol 85 (3) ◽  
pp. 473-479 ◽  
Author(s):  
Eva Johansson ◽  
Ramune Kuktaite ◽  
Allan Andersson ◽  
Maria Luisa Prieto-Linde


2001 ◽  
Vol 32 (3-4) ◽  
pp. 421-428 ◽  
Author(s):  
Gene Stevens ◽  
Steven Hefner ◽  
Tina Gladbach
Keyword(s):  
No Till ◽  


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