Effects of nitrogen source, rate and application time on boronia (Boronia megastigma Nees) leaf nitrogen and flower production

1989 ◽  
Vol 19 (3) ◽  
pp. 169-174 ◽  
Author(s):  
K. S. Reddy ◽  
R. C. Menary
Keyword(s):  
Nitrogen Source ◽  
Leaf Nitrogen ◽  
Application Time ◽  
Flower Production ◽  
Source Rate

Response of No-Till Corn to Nitrogen Source, Rate, and Time of Application

jpa ◽  
1992 ◽  
Vol 5 (4) ◽  
pp. 607-610 ◽  
Author(s):  
K. L. Wells ◽  
W. O. Thom ◽  
H. B. Rice
Keyword(s):  
Nitrogen Source ◽  
Time Of Application ◽  
No Till ◽  
Source Rate

Nitrogen Source, Application Time, and Tillage Effects on Soil Nitrous Oxide Emissions and Corn Grain Yields

2012 ◽  
Vol 76 (4) ◽  
pp. 1268-1279 ◽  
Author(s):  
C. F. Drury ◽  
W. D. Reynolds ◽  
X. M. Yang ◽  
N. B. McLaughlin ◽  
T. W. Welacky ◽  
...  
Keyword(s):  
Nitrous Oxide ◽  
Nitrogen Source ◽  
Nitrous Oxide Emissions ◽  
Application Time ◽  
Grain Yields ◽  
Corn Grain

scholarly journals EFFECT OF SOURCE , RATE AND APPLICATION TIME OF NITROGEN FERTILIZER ON SUGAR BEET

2012 ◽  
Vol 3 (11) ◽  
pp. 2903-2912
Author(s):  
M. Elsonbaty ◽  
G. Abdel - Hay ◽  
E. Nemeat–Alla ◽  
E. El-Tahawey
Keyword(s):  
Sugar Beet ◽  
Nitrogen Fertilizer ◽  
Application Time ◽  
Source Rate

Yield and zinc content of sugar beets as affected by nitrogen source, rate of nitrogen, and zinc application

1961 ◽  
Vol 11 (4) ◽  
pp. 279-286 ◽  
Author(s):  
Louis C. Boawn ◽  
Frank G. Viets Jr. ◽  
C.E. Nelson ◽  
C.L. Crawford
Keyword(s):  
Nitrogen Source ◽  
Zinc Content ◽  
Sugar Beets ◽  
Source Rate ◽  
Zinc Application

Irrigated Corn Productivity as Influenced by Nitrogen Source, Rate, and Climatic Conditions

2017 ◽  
Vol 109 (6) ◽  
pp. 2957-2965 ◽  
Author(s):  
Bijesh Maharjan ◽  
Richard B. Ferguson ◽  
Glen P. Slater
Keyword(s):  
Nitrogen Source ◽  
Climatic Conditions ◽  
Corn Productivity ◽  
Source Rate

scholarly journals The effect of nitrogen source and quantity on disease expression of Neonectria ditissima in apple

2021 ◽  
Vol 74 (2S) ◽  
pp. S20-S33
Author(s):  
Lizelle Vorster ◽  
Ruth C. Butler ◽  
Lauren Turner ◽  
Emma Patrick ◽  
Rebecca E. Campbell ◽  
...  
Keyword(s):  
Nitrogen Content ◽  
Nitrogen Source ◽  
Disease Incidence ◽  
Leaf Nitrogen ◽  
Leaf Nitrogen Content ◽  
Disease Development ◽  
Calcium Ammonium Nitrate ◽  
Disease Expression ◽  
Tree Survival ◽  
Applied Nitrogen

The effects of nitrogen on the interaction between apple trees and European canker caused by Neonectria ditissima are not well understood. Previous field and laboratory studies have shown that nitrogen affects N. ditissima disease development, germination and germ-tube growth in vitro but the type of nitrogen source has not been examined in vivo. Therefore, the aim of this study was to determine the effects of root-applied nitrogen from different sources on the development of European canker on inoculated potted trees. One-year-old ‘Royal Gala’ trees were planted in a low-nitrogen growth substrate and treated with a range of concentrations of calcium ammonium nitrate (CAN) or other nitrogen sources (Ca(NO3)2, KNO3, (NH4)2SO4, NH4NO3, urea, YaraMila™) at equivalent molar rates of nitrogen as the highest CAN treatment. Treatments were applied during the growing season (Nov to May). The control treatment received no applied nitrogen. Bud and leaf scar wounds were inoculated at leaf fall with N. ditissima conidia. Tree growth and health, disease progression and leaf nitrogen content were monitored. The rate of nitrogen application affected tree diameter and leaf nitrogen content while the nitrogen source mainly affected tree survival, powdery mildew incidence, leaf weights, leaf nitrogen and European canker symptom expression. Trees treated with (NH4)2SO4 had the lowest survival rates and highest leaf nitrogen content. Disease expression was highest with NH4NO3 and lowest with KNO3 applications. The control plants (which received no additional nitrogen), showed the least amount of both growth and disease expression. Applications of CAN, even at the lowest rate (20 g), increased disease susceptibility. Increasing rates of CAN applications did not significantly increase disease incidence. Nitrogen concentration is an important factor in the disease development of European canker of apple. Field evaluation is recommended to further validate these results.

Long Term Effects of Tillage and Nitrogen Source, Rate, and Placement on Grain Sorghum Production

jpa ◽  
1997 ◽  
Vol 10 (1) ◽  
pp. 141-146 ◽  
Author(s):  
P. R. Matowo ◽  
G. M. Pierzynski ◽  
D. A. Whitney ◽  
R. E. Lamond
Keyword(s):  
Nitrogen Source ◽  
Grain Sorghum ◽  
Long Term Effects ◽  
Source Rate ◽  
Sorghum Production
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