@book{199685,
	author = {Shahana C K and Dr. Beena V I (Guide)},
	title = {Interaction of phosphorus and sulphur in black cotton soils of Palakkad (AEU:23) under groundnut  (Arachis hypogaea L.) cultivation},
	publisher = {Dept. of Soil science and Agricultural Chemistry},
	year = {2020},
	address = {Vellanikkara}
}