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AHMED, H., ELMAAZ, E., KHALIL, H. (2014). POTASSIUM STATUS IN THE SOILS OF BAHTIM PERMANENT EXPERIMENT UNDER DIFFERENT CROP ROTATIONS AND FERTILIZER TREATMENTS. Egyptian Journal of Agricultural Research, 92(4), 1207-1215. doi: 10.21608/ejar.2015.155943
HODA M. R. M AHMED; ENSHRAH I. M. ELMAAZ; HUSSIEN M. KHALIL. "POTASSIUM STATUS IN THE SOILS OF BAHTIM PERMANENT EXPERIMENT UNDER DIFFERENT CROP ROTATIONS AND FERTILIZER TREATMENTS". Egyptian Journal of Agricultural Research, 92, 4, 2014, 1207-1215. doi: 10.21608/ejar.2015.155943
AHMED, H., ELMAAZ, E., KHALIL, H. (2014). 'POTASSIUM STATUS IN THE SOILS OF BAHTIM PERMANENT EXPERIMENT UNDER DIFFERENT CROP ROTATIONS AND FERTILIZER TREATMENTS', Egyptian Journal of Agricultural Research, 92(4), pp. 1207-1215. doi: 10.21608/ejar.2015.155943
AHMED, H., ELMAAZ, E., KHALIL, H. POTASSIUM STATUS IN THE SOILS OF BAHTIM PERMANENT EXPERIMENT UNDER DIFFERENT CROP ROTATIONS AND FERTILIZER TREATMENTS. Egyptian Journal of Agricultural Research, 2014; 92(4): 1207-1215. doi: 10.21608/ejar.2015.155943

POTASSIUM STATUS IN THE SOILS OF BAHTIM PERMANENT EXPERIMENT UNDER DIFFERENT CROP ROTATIONS AND FERTILIZER TREATMENTS

Article 1, Volume 92, Issue 4, December 2014, Page 1207-1215  XML PDF (496.71 K)
Document Type: Original Article
DOI: 10.21608/ejar.2015.155943
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Authors
HODA M. R. M AHMED; ENSHRAH I. M. ELMAAZ; HUSSIEN M. KHALIL
Soils, Water and Environmental Research Institute, Agricultural Research Center, Giza, Egypt
Abstract
Composite surface soil samples were taken from plots (Bahtim permanent experiment) receiving mineral and farmyard (FYM) fertilizer treatments in case of the one-, two- and three-year rotations. These soil samples represent the impact of subjecting such soils for about 100 years to prolonged cropping and fertilization treatments. Soluble, exchangeable, plant-available potassium in conjunction with the potassium intensity of these soils were determined. Moreover, the K-fixation capacity was considered in this study. The obtained data show an obvious decrease in potassium forms in case of the two- and three-year rotation compared with their levels in the one-year rotation. This depends on the crops grown in every rotation. The decrease in K- availability in soils have its impact on crop response to K- applications. This trend should be considered in managing the fertilization programs in the old lands. 
Keywords
Crop Rotations; Fertilizer; Potassium; Soils
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