%X Three types of earthworm cast, i.e. pellet cast, turret cast and mass cast, were analysed for physicochemical
characteristics, nutrient composition and compared with impact on soil fertility. The standard
methods of AOAC was used to analyse the pH, moisture content, cast profile, cations (Ca, Mg, Na, K,
Mn, Cu and Zn), anions (P, PO4, NO4, NO3, N), Organic Carbon and Organic Matter. Pellet cast recorded
a significantly higher pH of 8.60±0.01 while the mean pH of 8.09±0.01 and 7.81±0.01 were
obtained for turret and mass cast respectively (p<0.05). On the other hand, pellet cast recorded the
lowest moisture content (29.42%) compared with 45.60% and 47.19% obtained for mass cast and
turret cast respectively. The % organic matter (1.05±0.02), % organic carbon (0.61±0.01), % Nitrite
(0.008±0.001), % Nitrate (0.018±0.001), % Nitrogen (0.063±0.001) and % Phosphorus (0.39 ± 0.001)
obtained for Pellet Cast were significantly higher (p<0.05) than those obtained for mass and turret
casts. Pellet cast had higher Ca (11.04±2.80 mg/dL), Mn (113.08±38.45 mg/dL) and Zn (8.54±2.62
mg/dL) than turret (9.64±0.77, 77.0±17.02, 6.68±1.65 mg/dL) and mass cast types (4.54±0.25,
19.12±6.82, 2.04±0.70) mg/dL). This study indicated that pellet cast has poor water holding capacity
whereas it has higher nutrient concentration compared with mass and turret casts. On the overall,
pellet cast, mass cast and turret cast all played synergistic role in soil fertility.
%T NUTRIENT ANALYSIS OF THREE EARTHWORM
CAST-TYPES COLLECTED FROM IKENNE, OGUN
STATE, NIGERIA
%J Journal of Natural Science, Engineering and Technology
%K Earthworm casts, moisture content, nutrient composition, organic matter, soil fertility
%A A. A. Aladesida
%A G. A. Dedeke
%A K. O. Ademolu
%A F Museliu
%P 36-43
%L eprints7827
%I FUNAAB
%D 2014