PJB-2022-184
Spatial Distribution of Soil and Cotton Plant Macronutrient in the Representative Soil Series of RahimYar Khan District, Pakistan, III: Potassium
Ejaz Rafique
Abstract
Cotton (Gossypiumhirsutum L.) is a major crop after wheat and is cultivated on largest area among all other crops. Potassium (K) requirement of cotton is higher as it is estimated that 3-5 kg ha-1 K day-1 is required for normal growth of cotton crop. Efficient nutrient management using GIS and geo-statistics is vital for ensuring optimum crop production. A field survey was conducted for indexing K content in soils and foliage of cotton producing area using geo-statistical techniques and GIS modeling tools. A total of seventy soil and foliage samples associated were from each of the soil series from cotton producing area of district RahimYar Khan Punjab. Bioavailable K content is the soils ranged from 58 mg kg-1 (Missan series, HalicCamborthid) to 250 mg kg-1 (Sultanpur series, FluventicCamborthid) with the mean value of 136 mg kg-1±45.90. Spatial dependence of K in the surveyed area was found moderate to strong spatial thus directing to prepare GIS based maps for categorizing the study area in to numerous zones on the basis of differential K content status and its management on regional scale information generated.
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