@book{44174,
	author = {Havlin, John L. / Beaton, James D. / Tisdale, Samuel L. / Nelson, Werner L.},
	title = {Soil Fertility And Fertilizers : An Introduction To Nutrient Management},
	publisher = {Pearson Education ( Singapore ) Pte. Ltd.},
	address = {N. Delhi},
	edition = {7th},
	note = {537}
}