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Manures, Fertilizers and Agricultural Chemicals
This PDF is a comprehensive text that the department of soil science and agricultural chemistry at S.V. Agricultural College has developed on the different inputs necessary to improve agricultural productivity. The document is preceded by an introduction to bulky organic manures, where the amount lost at the time of collection and storage of farm yard manure (FYM) is reported. It deals with the preparation of composts, green manures, and terms of various organic wastes-terms like sewage and sludge. The book covers concentrated organic manures, biogas plants, and processes of manufacture of commercial fertilizers - both of nitrogenous, phosphatic, and potassic type. It also gives a rundown on mixed fertilizers and amendments, and secondary and micronutrient fertilizers. An essential feature is the Fertilizer Control Order, and thus this article becomes a fundamental reference point for understanding the role of fertilizers and manures in sustainable agriculture.
Author(s): Department of Soil Science and Agricultural Chemistry, S.V.Agricultural College
142 Pages 
Principles and practices of agricultural analysis
This is a very enlightened online material that has gone into deep detail on the methods and principles of agricultural analysis, especially concentrating on the chemistry of phosphates. While elaborating on general analytical processes that should be used while carrying out agricultural research, Wiley also goes ahead to give detail method for analyzing mineral phosphates and phosphoric acid. The general text introduces numerous techniques in the realm of analytical determinations, including the citrate method and volumetric determination, amongst others, and the importance of possessing the right titration in agricultural chemistry. The book will also take great length discussing chemistry involved in the manufacture of superphosphates, which is inevitable in improving soil fertility. Of special benefit to students, researchers, and other professionals in agricultural science are the broad foundational knowledge provided in the book that applies in academic and practical settings.
Author(s): Harvey Washington Wiley
NA Pages
UC Davis course notes on soil chemistry include some of the interactions in the soil system. These include three-phase system of the soil; solid phase reactivity; and the chemistry of solutions within the soil matrix. Cation exchange reactions, soil buffering and pH dynamics, and redox reactions affecting chemistry in soil have also been covered. This resource has been very important especially for students who wish to understand the intricate processes by which chemicals regulate soil fertility and health and grant them knowledge that ensures effective soil management.
Author(s): UC Davis
NA Pages