I= MODELING PHOSOHORUS AND POSTASSIUM REQUIREMENTS FOR CANOLA AND MUNGBEAN
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Title of Thesis
MODELING PHOSOHORUS AND POSTASSIUM REQUIREMENTS FOR CANOLA AND MUNGBEAN

Author(s)
AHMAD BILAL
Institute/University/Department Details
Institute of Soil and Environmental Sciences/ University Of Agriculture, Faisalabad
Session
2008
Subject
Soil Sciences
Number of Pages
192
Keywords (Extracted from title, table of contents and abstract of thesis)
phosohorus requirements, postassium requirements, canola, mungbean, nutrient dynamics, adsorption isotherms

Abstract
No Abstract

Download Full Thesis
5104.51 KB
S. No. Chapter Title of the Chapters Page Size (KB)
1 0 Contents
939.24 KB
2 1 Introduction 1
108.76 KB
3 2 Review Of Literature 8
765.85 KB
  2.1 Importance And Problem 8
  2.2 Phosphorus In Soil 9
  2.3 Phosphorus Status Of Soils Of Pakistan 10
  2.4 Factors Affecting P Adsorption 12
  2.5 Availability Of Phosphorus In Calcareous Soils 13
  2.6 Reactions Of P With Soil Constituents 15
  2.7 Forms Of K In Soil 22
  2.8 Factors Affecting K Adsorption On Soils 26
  2.9 Soil Adsorptive Properties Versus Nutrient Bioavailability 31
  2.10 Sorption Approach 31
  2.11 Adsorption Isotherms 32
  2.12 Adsorption Isotherms And Assessment Of Crop Requirement 37
  2.13 Phosphorus Buildup And Depletion In Soils 48
  2.14 K Depletion And Buildup 50
4 3 Materials And Methods 53
238.83 KB
  3.1 Site Selection And Preliminary Investigations 53
  3.2 Basic Analysis Of The Selected Soil 53
  3.3 Laboratory Study 55
  3.4 Calculation Of P And K Fertilizer Doses For Field Experiment 56
  3.5 Field Studies 57
  3.6 Plant Analysis 60
  3.7 P And K Fertility Buildup Factor (Pfbf & Kfbf) 62
  3.8 Level Of P And K Buildup 62
  3.9 Level Of P And K Depletion 62
  3.1 0 Internal P And K Requirements Of Crops 62
  3.11 External P And K Requirement Of Crops 63
  3.12 Statistical Analysis 63
5 4 Results And Discussions 64
2497.4 KB
  4.1 Construction Of Adsorption Isotherms 65
  4.2 Comparison Of Different Models Fitted To Adsorption Data 66
  4.4 Response Of Canola To Applied Fertilizer P 70
  4.5 Computation Of P Fertilizer Doses For Mungbean Crop 77
  4.6 Growth And Yield Of Mungbean Crop 78
  4.7 Computation Of Fertilizer P Doses For Canola Crop (3 rd Crop In P Buildup Study) 84
  4.8 Growth And Yield Of Canola Crop 85
  4.9 P Uptake By Crops Under Buildup Experiment 91
  4.10 Soil P Status In Buildup Experiment 92
  4.11 P Fertility Buildup Factor And Level Of P Buildup 93
  4.12 P Depletion Study 95
  4.13 Effect Of Residual P On Yield, Quality, P Concentration In Grain And Straw Of Mungbean 95
  4.14 Canola Crop (Second Crop In Depletion Study) 98
  4.15 P Uptake By Crops Under Depletion Experiment 101
  4.16 Soil P Status In Depletion Experiment 103
  4.17 Level Of P Depletion In Soils Per Annum 104
  4.18 Potassium Experiments 105
  4.19 Response Of Canola To Applied Fertilizer K 105
  4.20 Computation Of Fertilizer K Doses For Mungbean Crop 111
  4.21 Mungbean Crop 112
  4.22 Computation Of K Fertilizer Doses For Canola Crop 118
  4.23 Growth And Yield Of Canola Crop 119
  4.24 K Uptake By Crops Under Buildup Experiment 125
  4.25 Soil K Status In Buildup Experiment 127
  4.26 K Fertility Buildup Factor And Level Of K Buildup 128
  4.27 K Depletion Study 129
  4.28 Mungbean Crop 129
  4.29 Canola Crop (Second Crop In Depletion Study) 132
  4.30 K Uptake By Crops Under Depletion Experiment 135
  4.31 Soil K Status In Depletion Experiment 136
  4.32 Level Of K Depletion In Soils Per Annum 137
6 5 Summary 139
96.4 KB
  5.1 Conclusions 140
  5.2 Main Conclusions 144
  5.3 Areas Of Future Research 145
7 6 References 146
699.22 KB