scholarly journals Yield and quality of three potato cultivars under series of nitrogen rates

age ◽  
2020 ◽  
Vol 3 (1) ◽  
Author(s):  
Ahmed A. Zaeen ◽  
Lakesh K. Sharma ◽  
Ahmed Jasim ◽  
Sukhwinder Bali ◽  
Aaron Buzza ◽  
...  
Keyword(s):  
Potato Cultivars ◽  
Yield And Quality ◽  
Nitrogen Rates

Effect of nitrogen on the yield and quality of irrigated onions (Allium cepa L.) cv. Cream Gold grown on siliceous sands

1990 ◽  
Vol 30 (6) ◽  
pp. 845 ◽  
Author(s):  
NA Maier ◽  
AP Dahlenburg ◽  
TK Twigden
Keyword(s):  
Field Experiments ◽  
Maximum Yield ◽  
Soluble Solids ◽  
Fresh Weight ◽  
Marketable Yield ◽  
Scale Thickness ◽  
Yield And Quality ◽  
Allium Cepa L ◽  
Nitrogen Rates

The effect of nitrogen (N), at rates up to 590 kg N/ha, on the yield and quality of Cream Gold onions grown on siliceous sands was investigated in field experiments conducted during 1987-88 (1 site) and 1988-89 (2 sites). As the rate of applied N increased there was a significant (P<0.001) increase in the fresh weight of tops harvested when the largest bulbs were 25-30 mm in diameter. Fresh weight of tops was significantly (P<0.001) correlated with final marketable yield of bulbs. Nitrogen application accelerated top senescence. Nitrogen-deficient plants had erect green tops at harvest. Marketable yield was significantly (P<0.01) increased and the yield of culls (unmarketable bulbs) was significantly (P<0.01) decreased as the rate of N increased at all sites. Nitrogen rates in the range 299-358 kg N/ha were required for 95% of maximum yield. Scale thickness increased significantly (P<0.05) and glucose and fructose concentrations decreased significantly (P<0.05) at 2 sites as the rate of applied N increased. Soluble solids and dry matter of bulbs were not affected by N. Bulb size increased as the rate of applied N increased, however, the magnitude of the effect varied between sites. Number of days to 10% sprouting during storage at 15 � 0.5�C was significantly increased as the rate of applied N increased up to 40 kg N/ha at 2 sites. We have concluded that for the cv. Cream Gold grown on siliceous sands, the high rates of fertiliser N required to maximise marketable yield and bulb size were not detrimental to quality.

scholarly journals The effect of different nitrogen fertilization rates on yield and quality of marigold (Calendula officinalis L. 'Tokaj') raw material

2012 ◽  
Vol 64 (3) ◽  
pp. 29-34
Author(s):  
Beata Król
Keyword(s):  
Nitrogen Fertilization ◽  
Raw Material ◽  
Control Treatment ◽  
Calendula Officinalis ◽  
Fertilization Rates ◽  
Yield And Quality ◽  
Significant Difference ◽  
Pot Marigold ◽  
Nitrogen Rates

Pot marigold (<i>Calendula officinalis</i> L.) is an annual ornamental plant which is also grown for herbal raw material (flower heads) used in the pharmaceutical and cosmetic industries. A field experiment was carried out in the years 2006-2008 in the Experimental Farm of the University of Life Sciences in Lublin. The study was conducted on loess soil with the granulometric composition of silt loam. The aim of the experiment was to determine the effect of different nitrogen rates (0, 40, 80, 120, 160 kg N × ha<sup>-1</sup>) on some morphological features of flower heads as well as on yield and quality of pot marigold raw material. Flowering of pot marigold was shortest in the control treatment (32 days) and longest (43 days) in the plot where nitrogen fertilization had been applied at the highest rate (160 kg N × ha<sup>-1</sup>). Nitrogen fertilization had a significant influence on the number of flower heads per plant, but no significant difference was found in diameter as well as in ligulate flowers and tubular flowers in the flower head. It was found to increase significantly raw material yield after the application of 80 kg N × ha<sup>-1</sup>, compared to the control treatment. Yield of flower heads did not differ markedly for fertilization rates from 80 to 160 kg N × ha<sup>-1</sup>. Nitrogen fertilization modified slightly essential oil content (this content increased with increasing nitrogen rates), but at the same time it decreased the percentage of flavonoid compounds.

Tuber Yield and Quality of Two Potato Cultivars in Response to Nitrogen Fertilizer Management

2020 ◽  
Author(s):  
Natália S. Assunção ◽  
Adalton M. Fernandes ◽  
Rogério P. Soratto ◽  
Lydia Helena S. O. Mota ◽  
Nathalia P. Ribeiro ◽  
...  
Keyword(s):  
Nitrogen Fertilizer ◽  
Tuber Yield ◽  
Potato Cultivars ◽  
Fertilizer Management ◽  
Yield And Quality

Effects of irrigation regimes on yield and quality of upland rice and paddy rice and their interaction with nitrogen rates

2020 ◽  
Vol 241 ◽  
pp. 106344
Author(s):  
Yajie Zhang ◽  
Gaosheng Liu ◽  
Wenxin Huang ◽  
Jingnan Xu ◽  
Yadan Cheng ◽  
...  
Keyword(s):  
Upland Rice ◽  
Paddy Rice ◽  
Yield And Quality ◽  
Irrigation Regimes ◽  
Nitrogen Rates
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