Onweremadu And Okereke

Onweremadu and Okereke

Journal of  Agricultural Sciences

Vol. 2 (
7), pp.



 ISSN: 2276-7770 



Manuscript Number:


Fertility Indictors in Low-Input Agriculture in
Communities of Southeastern Nigeria


E.U Onweremadu and 2Okereke
– Ejiogu E.N


1Department of Soil Science
and Technology, Federal University of Technology, PMB
1526 Owerri, Nigeria.

2Department Agricultural
Extension, Federal University of Technology, PMB 1526
Owerri, Nigeria.


*Corresponding Author:

uzomaonweremadu @ yahoo.com


The study investigated the fertility of soils under
Caladium, Costus
, Setaria and Imperata in
10 locations of southeastern Nigeria. Soil samples

were collected at random on soils formed over
coastal plain

sands of southeastern Nigeria. Soil samples
were bulked, quartered

and air-dried before laboratory analysis. Soil
samples were sieved using a 2-mm sieve

and analyzed for some soil fertility indices.
Variation in soil fertility indices were computed using
analysis of variance (ANOVA) while means were separated with
least significant  difference (LSD) at 5% level of
probability. Calcium- magnesium ratios varied significantly
(p=0.05) among plant species, and values ranged from 3.6 (
Setaria (1.9), Costus (1.7) and Imperata
(0.8). Nitrate-nitrogen differed significantly (p=0.05)
among plant

species and distributed as follows: 0.13 g/kg
Caladium), 0.12g/kg (Setaria), 0.11g/kg (Costus)
and 0.08 g/kg (
Imperata). Base saturation values
decreased in the order of
Caladium (56%), Setaria
Costus (41%) and Imperata (21%). These
soil parameters had significant

(P< 0.05) positive relationships with total
carbon. It can be concluded that soils under
can be used to infer greater soil fertility in farmland.


Keywords: Soil fertility, indicator
plants, low-input agriculture, coastal plain sands

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