EFFECT OF SPRINKLER IRRIGATION AND NITROGEN FERTILIZATION ON TECHNOLOGICAL AND STORAGE VALUE OF CHOSEN POTATO CULTIVARS

2007 ◽  
pp. 353-356 ◽  
Author(s):  
S. Rolbiecki ◽  
C. Rzekanowski ◽  
R. Rolbiecki ◽  
T. Wojdyla
1994 ◽  
Vol 74 (3) ◽  
pp. 607-610 ◽  
Author(s):  
Peter M. A. Toivonen ◽  
B. J. Zebarth ◽  
P. A. Bowen

Broccoli quality in British Columbia can vary with season and with the farm site on which it is grown. One major management difference between farms is nitrogen fertilization rate. This work was conducted to determine the effect of nitrogen fertilization (0, 125, 250, 375, 500 and 625 kg N ha−1) and growing season (three plantings in 2 consecutive years) on vitamin C content, head size and storability of broccoli (Brassica oleracea var. Italica, 'Emperor'). The climatic conditions during crop growth and development had a greater overall effect on vitamin C content, head diameter and head weight than nitrogen fertilization. Weight and vitamin C losses during storage in the first year were not affected by nitrogen fertilization rates. Moderate nitrogen application rates of 125 and 250 kg N ha−1 in all three plantings produced a head size considered optimal for marketing. Key words: Postharvest, vegetable quality, climatic conditions


1994 ◽  
Vol 22 (3) ◽  
pp. 295-304 ◽  
Author(s):  
Christine E. Lewis ◽  
Jane E. Lancaster ◽  
Peter Meredith ◽  
John R. L. Walker

Agronomy ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 166 ◽  
Author(s):  
Jacek Żarski ◽  
Renata Kuśmierek-Tomaszewska ◽  
Stanisław Dudek

In Poland, under conditions of the moderate climate and transition between maritime and continental climates, the average rainfall totals of the growing season are in the range of 350–400 mm; however, they are distinguished by great temporal and spatial variability. Climatological studies demonstrate that the drought frequency is approximately 30%. Therefore, under such conditions, irrigation has a supplementary and intervention nature and is applied only when dry periods occur. The aim of this study was to determine the impact of sprinkler irrigation and increased nitrogen fertilization on the yield and quality of sugar beet roots and yield of sugar. The average increase of the yield under irrigation was 18.1 t·ha−1 which constituted a 22.8% increase in the yield. Furthermore, there was a marked tendency of a higher sugar content in the roots of irrigated plants. The absolute, relative, and unit average sugar beet root yield increases obtained under the influence of sprinkler irrigation and the lack of a significant diversity in the sugar content in roots confirm that irrigation contributed to an appropriate pace of plant growth and development. The increased rate of nitrogen fertilization (N2) of 160 kg N·ha−1 plus an additional 40 kg N·ha−1 resulted in the significantly greater root yields compared to the control (N1) (160 kg N·ha−1), i.e., an average of 7.6 t·ha−1 (9%). Based on the crop-water production function, the maximum root yields were obtained for the N1 rate at a total precipitation and irrigation amount of 382 mm, compared with 367 mm for the N2 rate.


2014 ◽  
Vol 46 (3) ◽  
pp. 209-217 ◽  
Author(s):  
Yul-Ho Kim ◽  
Guem Hee Kim ◽  
Hye Rim Ji ◽  
Yu-Young Lee ◽  
Hyang-Mi Park ◽  
...  

2002 ◽  
Vol 79 (4) ◽  
pp. 269-279 ◽  
Author(s):  
G. Bélanger ◽  
J. R. Walsh ◽  
J. E. Richards ◽  
P. H. Milburn ◽  
N. Ziadi

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