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Radwan, E., El- Shall, Z., Ali, R. (2011). EFFECT OF POTASSIUM FERTILIZATION AND HUMIC ACID APPLICATION ON PLANT GROWTH AND PRODUCTIVITY OF POTATO PLANTS UNDER CLAY SOIL. Journal of Plant Production, 2(7), 877-890. doi: 10.21608/jpp.2011.85622
E. A. Radwan; Z. S. A. El- Shall; R. A. M. Ali. "EFFECT OF POTASSIUM FERTILIZATION AND HUMIC ACID APPLICATION ON PLANT GROWTH AND PRODUCTIVITY OF POTATO PLANTS UNDER CLAY SOIL". Journal of Plant Production, 2, 7, 2011, 877-890. doi: 10.21608/jpp.2011.85622
Radwan, E., El- Shall, Z., Ali, R. (2011). 'EFFECT OF POTASSIUM FERTILIZATION AND HUMIC ACID APPLICATION ON PLANT GROWTH AND PRODUCTIVITY OF POTATO PLANTS UNDER CLAY SOIL', Journal of Plant Production, 2(7), pp. 877-890. doi: 10.21608/jpp.2011.85622
Radwan, E., El- Shall, Z., Ali, R. EFFECT OF POTASSIUM FERTILIZATION AND HUMIC ACID APPLICATION ON PLANT GROWTH AND PRODUCTIVITY OF POTATO PLANTS UNDER CLAY SOIL. Journal of Plant Production, 2011; 2(7): 877-890. doi: 10.21608/jpp.2011.85622

EFFECT OF POTASSIUM FERTILIZATION AND HUMIC ACID APPLICATION ON PLANT GROWTH AND PRODUCTIVITY OF POTATO PLANTS UNDER CLAY SOIL

Article 3, Volume 2, Issue 7, July 2011, Page 877-890  XML PDF (487.3 K)
Document Type: Original Article
DOI: 10.21608/jpp.2011.85622
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Authors
E. A. Radwan; Z. S. A. El- Shall; R. A. M. Ali
Horticulture Res. Institute, Agriculture Research Centre, Giza, Egypt
Abstract
This experiment was carried out during the two successive summer seasons of 2008 and 2009 at  Private Farm in El-Mahala El-Kobra region Ghrabia Governorate, on potato plant  cv. Diamant to study the effect of potassium rates  ( 0,50 and 100 kg K2O/fed) and humic acid  as soil application  ( 0, 2 and 4 kg/fed. as humate potassium)  as well as their interactions on growth,   nutrition  status and productivity of potato under clay  soil.
Application of 100 kg K2O/fed.  was the superior treatment for enhancing   dry weight of straw and tubers,  percentage  of N,P and k  and total uptake  by plant  as well as   total yield/fed.
Treated of  potato plants with humic acid at 4 kg/fed. gave the maximum values of plant growth and plant nutritional statues as well as  yield and its components  with significant differences with 2 kg / fed. with respect to N,P and K (%) and  yield and its components.
 The best interaction treatment for increasing yield and its components  was obtained by  fertilization of potato plants with 100 kg K2O / fed. and  treated of plants with 2 kg /fed.  humic acid.
Keywords
Potato; potassium; humic acid and yield and its components
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