08-27-2017, 07:40 PM
You can accurately determine that if you carry out soil test. But it is quite costly. The last time I asked at ADP Awka, they told me N10,000! But it is worth the cost if you cultivate large area of land or if your profit will more than cover the cost. And you don't have to do it every time you want to plant. You do it every 2-3yrs, when you want to plant a different crop or when u suspect fertility problem during growth.