Chukwuka made this call in an interview with the News Agency of Nigeria (NAN) on Thursday in Lagos.
The expert said that most farmers were ignorant of the contents of the fertilisers they apply on their crops and may need a reorientation.
“There are some fertilisers that are harmful both to the crops and human health. Unfortunately, most farmers are not aware of the composition of most of these fertilisers.
“Agriculture extension services also need to educate farmers on the harmful contents some fertilisers portend on crops,” Chukwuka said.
He said that some harmful fertilisers needed to be wiped off the markets.
According to him, local farmers need to learn how to apply fertilisers in the right mix, to reduce the rate of decay in the fertiliser-grown crops.
“It is very difficult to differentiate between organically grown crops and crops grown with fertilisers in the market.
“There are some factors we can look out for to distinguish between organic and inorganic crops.
“Organic crops are not as big or plump in size like the fertilised-grown crops. They taste better and contain more nutrients than the others,” he said.
Chukwuka added that organic crops have longer shelf lives than crops grown with fertilisers.
“For example cucumbers grown with fertilisers may start to decay two days after harvest, which is not the case with organic cucumbers,” Chukwuka said.
In addition, he noted that “Farmers should also be wary in the application of insecticides and pesticides on their farms. This should be done under strict supervision and guidance from extension agents.
“Unfortunately, some farmers apply sniper on crops. This is harmful to the crops and to humans upon consumption.