What fertilizers to use
36. Groundnuts need above all phosphorus, calcium and sulfur.
The fertilizer called superphosphate contains these in the form
of mineral salts.
But different amounts of fertilizers have to be used in
different areas, because the soils are not the same. Ask your extension worker
what fertilizer to choose and how much of it to apply.
37. To apply too much fertilizer is also a waste of money.
On an experimental field, an application of 75 kilogrammes of
superphosphate per hectare resulted in a crop of 1300 kilogrammes of unshelled
groundnuts. An application of 150 kilogrammes of superphosphate per hectare
yielded a crop of only 1340 kilogrammes. The extra 40 kilogrammes of groundnuts
did not pay for the extra 75 kilogrammes of fertilizer used.
Groundnuts can use chemical fertilizers better if you put
organic manure on the field before