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	1.	Soil testing and plant analysis. by Westerman, Robert Lee, 1938- Soil Science Society of America Series: Soil Science Society of America book series ; no. 3 Edition: 3rd ed. Publication details: Madison, Wis., USA : Soil Science Society of America, 1990 Availability: Not available: Main: Withdrawn (1). Add to cart (remove)
	2.	Detecting mineral nutrient deficiencies in tropical and temerate crops / edited by Donald L.Pluknett and Howard B.Sprague. by Plucknett, Donald L Sprague, Howard Bennett Series: West tropical agriculture sreies ; no. 7. Publication details: Boulder : Westview Press, 1989 Availability: Not available: Main: Withdrawn (1). Add to cart (remove)

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