Handbook of Econometrics Vols1-5 Chapter 18 pptx
Biology of Marine Birds - Chapter 18 pptx
... significant mortality of shorebird populations is unknown. 18. 4 SHOREBIRDS ON ISLANDS 18. 4.1 E NDEMISM Biologists often think of islands as important sites for evolutionary differentiation of terrestrial species. ... the specter of a more widespread problem. The disappearance of millions of birds suggests that they are as vulnerable as any marine seabird to anthropogenic altera...
Ngày tải lên: 18/06/2014, 16:20
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 ... 6/14/2006 7:04 AM Page 180 CRC_DK2972_Ch006.qxd 6/14/2006 7:04 AM Page 182 The other 70 to 85% of the magnesium in plants is associated with the role of magnesium as a cofac...
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 ... attention of agronomists, much of the focus on chlorine in terms of crop production continues to be over the presence of excess levels of chloride salts in soils, wa...
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 ... and of restricting supply of manganese to part of a split root system. Aust. J. Plant Physiol. 11:113– 118, 1984. 58. F.K. El-Baz, P. Maier, A.H. Wissemeier, W.J. Horst. Up...
Ngày tải lên: 02/07/2014, 00:20
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...
Ngày tải lên: 02/07/2014, 00:20
Handbook of Plant Nutrition - chapter 18 ppt
... Wisconsin CONTENTS 18. 1 The Element Selenium 515 18. 1.1 Introduction 515 18. 1.2 Selenium Chemistry 516 18. 2 Selenium in Plants 517 18. 2.1 Introduction 517 18. 2.2 Uptake 517 18. 2.3 Metabolism 518 18.2.4 Volatilization ... Soils 523 18. 5 Selenium in Human and Animal Nutrition 524 18. 5.1 Introduction 524 18. 5.2 Dietary Forms 524 18. 5.3 Metabolism and Form of Selenium 525...
Ngày tải lên: 02/07/2014, 00:20
