About the Book
"Plant tissue analysis is a valuable aid in crop management. Alone, it can be used for making fertilizer recommendations for certain crops, such as fruits tree. For other crops, plant tissue analysis in combination with soil test information is the recommended approach for diagnosing nutrient deficiencies and determining fertilizer requirements. As no essential element can substitute for another, it is mainly important to identify where and when such deficiencies occur. That’s where the role of soil and plant analysis comes in. Techniques have been developed to evaluate soil fertility constraints based on soil chemical extraction and analysis of the plants that grow on such soils. Both are complementary and, when calibrated with field crop responses to fertilizer, provide a rational basis to identify what elements are missing, and how much fertilizer, whether organic or inorganic, to apply. Therefore, water, soil and plant analysis have a vital role in agricultural development. Soil testing is now an intrinsic part of modern farming, as well as in many developing countries. Tests primarily focus on the elements in most demand by crops which are supplied by fertilizers: nitrogen (N), phosphorus (P), and potassium (K). Depending upon the soil types, in some regions tests are also conducted for secondary nutrients: calcium (Ca), magnesium (Mg), and sulfur (S). In drier areas, micronutrients such as iron (Fe), zinc (Zn), manganese (Mn), copper (Cu), and boron (B) are often measured, since deficiencies of these elements are more frequently associated with calcareous soils. Indeed such areas may also have excessive or toxic levels of some elements, such as B, and high levels of elements such as Na and Mg, which can adversely affect soil physical properties. As nutrient behavior in soils is governed by soil properties and environmental conditions, measurement of such properties is often required. Irrigated agriculture is dependent on an adequate water supply of usable quality. Water quality concerns have often been neglected because good quality water supplies have been plentigul and readily available. This situation is now changing in many areas. Intensive use of nearly all good quality supplies means that new irrigation projects and old projects seeking new or supplemental supplies must rely on lower quality and less desirable sources. To avoid problems when using these poor quality water supplies, there must be sound planning to ensure that the quality of water available is put to the best use. The objective of this work is to help the reader to a better understanding of the effect of water quality upon soil and crops and to assist in selecting suitable alternatives to cope with potential water quality related problems that might reduce production under prevailing conditions of use.
Two-volume ‘Brig’s Handbook of Methods & Research in Plant, Soil and Water Analysis’ primarily deals with soil testing, a number of important plant tests are presented, since they may complement the soil tests and are frequently needed for soil fertility and plant nutrition studies. The importance of proper soil, plant and water sampling has been highlighted, and guidelines of sample collection, processing, and storage have been provided.Soil, plant, and water analysis is also fundamental for success of the soil fertility network. To fill the gap that existed, a comprehensive handbook on all essential soil, plant, and water analyses was developed. This Handbook of analytical methods has been compiled to be used primarily by research assistants, technicians and student trainees working in the laboratory."