scholarly journals Studies on the Growth Phase and Effect of Fertilizer Application to Rice Plants in Malaya : II. Growth of top and root and effects of nitrogen and silicate.

1965 ◽  
Vol 34 (1) ◽  
pp. 6-13 ◽  
Author(s):  
Katsuo SUGIMOTO
Keyword(s):  
Growth Phase ◽  
Fertilizer Application ◽  
Rice Plants

scholarly journals Fertilizer Nitrogen Uptake and Partitioning in Young and Mature Common Hackberry (Celtis occidentalis) Trees

2013 ◽  
Vol 39 (2) ◽  
Author(s):  
L.P. Werner ◽  
L.G. Jull
Keyword(s):  
Growth Phase ◽  
Total Concentration ◽  
Fertilizer Application ◽  
Application Rate ◽  
Mature Trees ◽  
Total N ◽  
Current Season ◽  
Stem Wood ◽  
Application Rates ◽  
Celtis Occidentalis

Twenty-one mature and thirty-six young common hackberry (Celtis occidentalis L.) trees received a single application of 15N double isotope enriched ammonium-nitrate (NH4NO3) fertilizer. Application rates were 0, 0.49, and 1.47 kg N 100 m-2 of canopy coverage, respectively. Foliage, current season stem wood, stem wood, root, and fruit tissues were analyzed for total concentration [N] and nitrogen derived from fertilizer (NDFF). Growth phase and application rate did not consistently affect total % [N], particularly the N demanding foliage. Growth phase and application rate significantly affected the percentage of NDFF. In every instance, NDFF was highest in the tissues of young trees and/or trees receiving the 1.47 kg N 100 m-2 application rate. Mature trees relied upon previously assimilated N to meet the annual demand for N to a greater extent than young trees.

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