A study of the effect of intensive cropping and the use of pure chemicals on the need for elements other than nitrogen, phosphorus, and potassium on certain soil types and the effect of natural Chilean nitrate of soda in supplying these elements

Wellborn, Fred LaFayette2024-04-112024-04-111942https://hdl.handle.net/10919/118541[6], 70 leavesapplication/pdfenIn CopyrightLD5655.V855 1942.W443Cropping systemsPotassiumA study of the effect of intensive cropping and the use of pure chemicals on the need for elements other than nitrogen, phosphorus, and potassium on certain soil types and the effect of natural Chilean nitrate of soda in supplying these elementsThesis