Determination of Phosphorus Requirement of Cowpea (Vigna Unguiculata) In Some Soils of Southeastern Nigeria Using Phosphate Sorption Isotherm
ABSTRACT
The study was designed to determine the fertilizer P requirement of cowpea using P sorption isotherm. The P - sorption capacities of some soils Umudike and Bende, were determined. The method used involved equiliberating 3g of soil in 30m1s of 0.01 M CaCl7containing various levels of phosphorous at room temperature. From the P - sorption curve, the standard P Requirement of the soils were determined. The values were medium and low at 125.0 ,ag/g aiid 65.0 pgIg soil for Umudike and Bende respectively. The langrnuir equation was applied to the data, from which the P-sorption maximum was calculated. The values were fairly high at 299.04 g/g and 178.57 g/g soil for Umudike and Bende respectively. From the Sorption Isotherm Curve, the P fertilizer required at various levels of P were determined and used in the green house trials. From the study. 0.08 ppm soil solution P equivalent to the fertilizer rates 130 kg P/ha and 70 kg P/ha in Umudike and Bende soils respectively gave the optimum yield for cowpea in these soils.
TABLE
OF CONTENTS
PAGE
TITLE
ii
CERTIFICATION
ACKNOWLEDGEMENT
iv
DEDICATION
v
TABLE
OF CONTENTS vi
LIST
OF TABLES vii
LIST
OF FIGURES viii
ABSTRACT
iv
1.0
2.0
INTRODUCTION
LITERATURE
REVIEW
1-2
3
- 9
3.0
MATERIALS AND METHODS 10 - 12
4.0
RESULTS AND DISCUSSION 13 - 24
5.0
SUMMARY AND CONCLUSION 25
6.0
REFERENCE 26 - 31
7.0 APPENDIX 32 - 52
0.0
CHUKWUEMEKA, K (2021). Determination of Phosphorus Requirement of Cowpea (Vigna Unguiculata) In Some Soils of Southeastern Nigeria Using Phosphate Sorption Isotherm. Repository.mouau.edu.ng: Retrieved Apr 29, 2024, from https://repository.mouau.edu.ng/work/view/determination-of-phosphorus-requirement-of-cowpea-vigna-unguiculata-in-some-soils-of-southeastern-nigeria-using-phosphate-sorption-isotherm-7-2
KEMJIKA, CHUKWUEMEKA. "Determination of Phosphorus Requirement of Cowpea (Vigna Unguiculata) In Some Soils of Southeastern Nigeria Using Phosphate Sorption Isotherm" Repository.mouau.edu.ng. Repository.mouau.edu.ng, 17 May. 2021, https://repository.mouau.edu.ng/work/view/determination-of-phosphorus-requirement-of-cowpea-vigna-unguiculata-in-some-soils-of-southeastern-nigeria-using-phosphate-sorption-isotherm-7-2. Accessed 29 Apr. 2024.
KEMJIKA, CHUKWUEMEKA. "Determination of Phosphorus Requirement of Cowpea (Vigna Unguiculata) In Some Soils of Southeastern Nigeria Using Phosphate Sorption Isotherm". Repository.mouau.edu.ng, Repository.mouau.edu.ng, 17 May. 2021. Web. 29 Apr. 2024. < https://repository.mouau.edu.ng/work/view/determination-of-phosphorus-requirement-of-cowpea-vigna-unguiculata-in-some-soils-of-southeastern-nigeria-using-phosphate-sorption-isotherm-7-2 >.
KEMJIKA, CHUKWUEMEKA. "Determination of Phosphorus Requirement of Cowpea (Vigna Unguiculata) In Some Soils of Southeastern Nigeria Using Phosphate Sorption Isotherm" Repository.mouau.edu.ng (2021). Accessed 29 Apr. 2024. https://repository.mouau.edu.ng/work/view/determination-of-phosphorus-requirement-of-cowpea-vigna-unguiculata-in-some-soils-of-southeastern-nigeria-using-phosphate-sorption-isotherm-7-2