scholarly journals Nitrogen Content of Leaves Affects the Nodal Position of the Last Visible Primary Tiller on Main Stems of Rice Plants Grown at Various Plant Densities

2006 ◽  
Vol 9 (3) ◽  
pp. 242-248 ◽  
Author(s):  
Ryouji Sasaki ◽  
Kazunobu Toriyama
Keyword(s):  
Nitrogen Content ◽  
Rice Plants ◽  
Primary Tiller ◽  
Plant Densities ◽  
Nodal Position

Nature of Competition between Weeds and Rice for Nitrogen Under Dry Land Conditions

1973 ◽  
Vol 9 (3) ◽  
pp. 219-223 ◽  
Author(s):  
T. Chakraborty
Keyword(s):  
Nitrogen Content ◽  
Rice Straw ◽  
Dry Matter ◽  
Weed Competition ◽  
Weed Species ◽  
Dry Land ◽  
Rice Plants ◽  
Significant Difference

SUMMARYThe nitrogen content of weeds was significantly higher than that of Dular rice-straw, but with Taichung Native I rice in winter there was no significant difference between the nitrogen in weed samples and rice plants at the tillering stage. Rice straw contained a higher proportion of nitrogen where there were three hand weedings. The total dry matter of rice was much reduced by weed competition. Weed species contained much nitrogen at the vegetative, flowering and post-flowering stages, indicating severe competition for nitrogen by weeds throughout the growth of rice under dry land conditions.

scholarly journals Varietal Differences in Photosynthetic Rates in Rice Plants, with Special Reference to the Nitrogen Content of Leaves

2010 ◽  
Vol 13 (1) ◽  
pp. 53-57 ◽  
Author(s):  
Tadashi Hirasawa ◽  
Satomi Ozawa ◽  
Renante Taylaran ◽  
Taiichiro Ookawa
Keyword(s):  
Special Reference ◽  
Nitrogen Content ◽  
Varietal Differences ◽  
Photosynthetic Rates ◽  
Rice Plants

scholarly journals Narrow and twin-row plantings do not increase maize yield

2020 ◽  
Vol 38 (3) ◽  
pp. 342-349
Author(s):  
Luís Sangoi ◽  
Amauri Schmitt ◽  
Marcos Cardoso Martins Júnior ◽  
Hugo François Kuneski ◽  
Antonio Eduardo Coelho
Keyword(s):  
Grain Yield ◽  
Leaf Area Index ◽  
Nitrogen Content ◽  
Leaf Area ◽  
Plant Density ◽  
Block Design ◽  
Plant Distribution ◽  
Area Index ◽  
Plant Densities ◽  
Row Space

Reducing row space and sowing in twin rows of maize (Zea mays L.) allow more equidistant plant distribution at the same density. The objective of this research was to evaluate the effect of these two management practices on the nitrogen content of the index leaf, the leaf area index at silking, and the grain yield of maize at different plant densities. The experiment was carried out in Lages, Santa Catarina State University, in southern Brazil during the growing seasons 2016-2017 and 2017-2018. A split-plot arrangement of a randomized complete block design was used. Two plant densities (7 and 9 plants m-2) were distributed in the main plot, and five row spaces (0.4, 0.6, 0.8, 1.0 m and twin rows 0.6 m apart with 0.18 m between rows) were evaluated in split-plots. Physiological traits and grain yield were determined on the maize hybrid P30R50YH. The experiments were sown on 10/20/2016 and 10/21/2017. Kernel yields were higher at the plant density of 9 plants m-2 than at 7 plants m-2. The row space did not affect the nitrogen content of the index leaf, the crop leaf area index at silking, and the maize grain yield. The increment of plant density was more effective than the use of narrow and twin rows to enhance P30R50YH  hybrid grain yield.

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