Handbook of Econometrics Vols1-5 Chapter 41 ppt
Handbook of Plant Nutrition - chapter 2 ppt
... of nitrogen or another nutrient is associated with suboptimum devel- opment of a plant, as reflected by the appearance of symptoms of deficiency, the suppression of yields, or to the response of ... concentrations of nitrogen that exceed 3% of the dry mass of mature leaves. Leaves of grasses (Gramineae, Poaceae) (1.5 to 3.5% N) are typically lower in total nitrogen concentra...
Ngày tải lên: 02/07/2014, 00:20
Handbook of Plant Nutrition - chapter 6 pptx
... 147 6.3 Diagnosis of Magnesium Status in Plants 148 6.3.1 Symptoms of Deficiency and Excess 148 6.3.1.1 Symptoms of Deficiency 148 6.3.1.2 Symptoms of Excess 149 6.3.2 Environmental Causes of Deficiency ... accumulation of magnesium may change during different stages of physiological development. Knowledge of these changes is important in managing nutritional regimes for plant gro...
Ngày tải lên: 02/07/2014, 00:20
Handbook of Plant Nutrition - chapter 9 pptx
... concentration of 100 mg kg Ϫ1 (68). Because igneous rocks and parent materials in gen- eral contain only minor amounts of chloride, little of this nutrient arises from weathering. Most of 286 Handbook of ... Crops A review (4) of chlorine nutrition tabulated the concentrations of chloride in a wide variety of crops. The compilation of data in Table 9.2 shows that concentra...
Ngày tải lên: 02/07/2014, 00:20
Handbook of Plant Nutrition - chapter 12 pptx
... excess of one nutrient can aggravate a deficiency of another, and so symptoms of man- ganese toxicity bear some features of deficiency of another nutrient. Additionally, toxicity of man- ganese is often ... 11:19 AM Page 364 358 Handbook of Plant Nutrition TABLE 12.1 List of Critical Concentrations of Manganese in Various Agricultural Crops Concentration of Growth Plant T...
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Handbook of Plant Nutrition - chapter 14 pptx
... knowledge of the complete biological significance of nickel for plant productivity is still quite limited; however, with the demonstration of the essentiality of nickel in diverse species (1,2) 396 Handbook ... the leaves of soybean and cowpea. Leaflet tips of nickel-deficient plants contained concentrations of urea as high as 2.4% dry weight. The accumulation of urea occurred...
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Handbook of Plant Nutrition - chapter 18 ppt
... increased application of SO 4 2Ϫ fertilizer. Volatilization of selenium is also influenced by the chemical form of selenium in the growing medium. The rate of selenium volatilization of a hybrid poplar ... Molecular genetics of sulfate assimilation in plants. Plant Physiol. 97 :411 – 419 , 1996. 47. G. Gissel-Nielsen. Uptake and translocation of selenium-75 in Zea mays L. In: Pr...
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