3.5.2. Abelmoschus esculentus or okra
It was observed that okra treated with composted SBE improved
significantly in the plant height(Fig. 3a),the size ofthe leaf(Fig. 3b),
the stem diameter (Fig. 3c), the yield and the fruit size (Fig. 3d)
compared to that of the plants without treatment. The treated okra
had healthier growth too.
The t-test ofthe fresh weights ofthe total biomass (whole plant)
and the selected parts ofthe harvested biomass after amonth of cultivation with the composted SBE showed significantimprovements
on the overall plant growth and fruit yield (Fig. 4a). The results
showed an overall 2- to 3-fold increase in okra fresh weight production – for the total biomass (m = 19.8, SD = 1.7, t(4) = 2.8, p = 0.0003)
and for the fruit (m = 16.1, SD = 1.5, t(3) = 3.2, p = 0.003). Under the
same treatment and after a complete 3-month trial, the okra plants
demonstrated insignificant growth in both the root (p = 0.18) and
leaf (p = 0.70) in the dry weight basis. However, there is enough
evidence (p = 0.01 and 0.04, respectively for the fresh and dry fruit
weights which are <˛= 0.05) to show that the yield productivity
of okra for this treatment increased significantly i.e. 60% for fresh
yield and 37% for dry yield, respectively (Fig. 4b).
The observations conducted on the big scale field evaluation
and efficacy testing showed that there was a significant increment (∼60%) in the fresh weight of groundnut magenta (Table 5).
It was observed that the plot treated with composted SBE-based
bio organic fertilizer in groundnut magenta cultivation showed less
population of wild grass as well as having brighter leaf colour and
clear leaf bones.Hence, the pot and field trials that have been conducted so far
showed that composted SBE-based bio organic fertilizer enhances
soil fertility, promotes rapid root and plant growth, and improves
cropquality while increasing cropproductivity andyield.Currently,
some trials are under way to investigate the effects of this organic
fertilizer on oil palm productivity. Nevertheless, it would be of
interest to focus on incorporating SBE with other wastes generated for potential application on a wide range of other crops in the
future.
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