Search Articles: Advance Search
Agro-Science
Journal of Tropical Agriculture, Food, Environment and Extension
 

ISSN 1119-7455
   
 
         
 
 Latest Articles
    
 
Article No 3 of Volume 6.1 (2007)
 
    
 Archive
 
 
EFFECTS OF PHOSPHORUS AND FOUR TILLAGE MULCH SYSTEMS ON THE PHYSICO-CHEMICAL PROPERTIES OF AN ULTISOL IN EASTERN NIGERIA.

AHAMEFULE H. E. and MBAGWU J. S. C.

Department of Soil Science, University of Nigeria, Nsukka, Nigeria.

Key words: Physical properties, chemical properties, phosphorus rates; soil management                 

ABSTRACT

 

The effects of four tillage-mulch systems on some soil physico-chemical properties of an Ultisol under cowpea (Vigna unguiculata) cultivation were investigated from the year 2004 to 2005. The tillage-mulch treatments consisted of tilled-mulched (TM), untilled-mulched (UM), tilled-unmulched (TU), and untilled-unmulched (UU) (control) plot. Differences in the infiltration rate and bulk density of the treated plots were significant at P<0.05. Micro-porosity, macro-porosity, total porosity, mean weight diameter of water stable aggregates and saturated hydraulic conductivity, however, did not show significance. The infiltration rates of the TM, TU, UM and UU treated plots were 0.022, 0.016, 0.012, 0.010 and 0.027, 0.019, 0.012 and 0.010cm sec-1 for the first and second years, respectively. The infiltration rates on tilled plots significantly (p<0.05) increased and doubled that of the untilled plots, while mulching significantly (p<0.05) increased infiltration rates on tilled plot. The TM plots increased by 23%, TU by 19% while the UM and UU plots were stable in their infiltration rates from the first to the second year. Seventeen percent of this increase was attributed to mulching while 83% to tillage. The bulk density of untilled plots (1.55 – 1.59 g cm-3) were higher (p <0.05) than that of tilled plots (1.26 – 1.49 g cm-3) while mulching tended to significantly increase bulk density on tilled plots. The mulched plots had high available  P (30.54 – 40.88 mg kg-1) compared to the control plot (25.50 – 26.69 mg kg-1), 9 weeks after phosphorus treatment. Available P in UM plots were higher than in the other plots. These variations in available P following the tillage-mulch treatments did not result in significant changes in the tissue P of cowpea at flowering.

Full Article (91.54Kb) | All Articles in Volume 6.1
 
 

Date:26/09/2018
 
     
 
 
 
  Copyright © 2008 All Rights Reserved  
  Website Designer:   Cygital
Home | Login | Register | About Us | Contact | Help