Editing Nitrogen deficiency (section)

==Symptoms==
Some symptoms of nitrogen deficiency (in absence or low supply) are given below:
#The [[chlorophyll]] content of the plant leaves is reduced which results in pale yellow color ([[chlorosis]]). Older leaves turn completely yellow.
#Flowering, fruitings, protein and starch contents are reduced. Reduction in protein results in stunted growth and dormant lateral buds.<ref name=asd>{{cite book
|last1=Pandey
|first1=S N
|last2=Sinha
|first2=B K
|chapter=Mineral Nutrition
|title=Plant Physiology
|edition=fourth
|location=576Masjid Road, Jangpura, New Delhi-110014
|publisher=VIKAS PUBLISHING HOUSE Pvt. Ltd.
|pages=125–126
|isbn=978-8125918790
|date=November 2009
}}
</ref>

===Disease===
Plants look thin and pale, and the condition is called ''general starvation''.<ref name=asd/>

=== Effect on Potato Production ===
Symptoms of nitrogen deficiencies in plants is general chlorosis of the leaves, which is when leaves turn pale green and cup upwards severely in deficient plants.<ref>{{Cite web|url=http://www.extension.uidaho.edu/nutrient/crop_nutrient/potato.html|title=Idaho Nutrient Management - Potato|website=www.extension.uidaho.edu|access-date=2016-12-02}}</ref> Nitrogen deficiencies also cause leaves to remain small and drop prematurely, resulting in less photosynthesis occurring in the plant. In addition, fewer and smaller tubers can form for harvest. There is a direct correlation between tuber size and yield and the amount of plant-available nitrogen in the soil. This makes it crucial that fields have enough nitrogen in the soil to grow prosperous crops.<ref>{{Cite web|url=http://www.yara.us/agriculture/crops/potato/key-facts/role-of-nitrogen/|title=Role of Nitrogen in Potato Production {{!}} N Deficiencies & Application {{!}} Yara|website=www.yara.us|access-date=2016-12-02|archive-url=https://web.archive.org/web/20171214144104/http://www.yara.us/agriculture/crops/potato/key-facts/role-of-nitrogen/|archive-date=2017-12-14|url-status=dead}}</ref> However, excess nitrogen in the soil can also be harmful to potato production, influencing how well the roots are able to develop, and delays can occur in tuber initiation during the tuberization stage of potato growth.<ref>{{Cite web|url=http://cropwatch.unl.edu/potato/peg_nitrogen|title=Nitrogen {{!}} CropWatch|last=Network|first=University of Nebraska-Lincoln {{!}} Web Developer|website=cropwatch.unl.edu|access-date=2016-12-02|date=2015-09-17}}</ref>