Characterization and Management of Some Inland Depression Soils for Sustainable Crop Production in Southeastern Nigeria.

G. S. Effiong* and D. J. Udoh

Department of Soil Science, Faculty of Agriculture

University of Uyo, Bag10l7, Uyo, Nigeria

Abstract:    This study  was conducted to characterize  some inland depression soils in Southeastern Nigeria  and recommend management option for  sustainable  crop production.Eight profile pits were sited at Ekpene Ukpa (Ek1), Nung Obong (NO3 and NO4), Ikot Obong (KS2), Ibiaku Ikot Obong (TU16), Ikot Eto (ND15), Awa Ntong (AU17) and Ikot Okobo (AU18) depressions. Results showed that soil texture ranged from sand through sandy loam to sandy clay  loam. Soil  reaction  varied  from very  strongly  to moderately  acid (3.0 -  6.0) with pH value averaged 5.0 ± 0.4. Organic matter  content was high in the surface  soils (23.22  - 51.43gkg-1)  while total N level was low (0.1 –  1.3gkg-1). Available P  (4.26  -  253mgkg-1ranged from low to very  high. Cation exchange  capacity  (CEC) was low while  percentage base saturation ranged from moderate to high (33 - 83%). The main constraints to sustainable crop production in these soils are low chemical fertility (moderate to high exchange acidity, low CEC, total N level, high percent Al saturation, 20 - 98%) and rapid weed growth. Slash and mulch system along with crop residues return and application of green leaf manures to the soil  could affect several restorative  processes in addition to suppressing  weed growth. Mineral fertilizers, if available could have the desired effect on the soil by increasing biomass production for use as residue mulch and yield of crops.

Keywords: Inland wetlands, characteristics, soil management, crop production. 

 

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Last modified on Tuesday, 21 January 2014 13:28

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