Chapter 8 - 3 Nutrient Relations : Nitrogen

Chapter 8 - 1 Nutrient Relations : Requirements and Sources Table of Contents

Relationship between nutrients and phytoplankton biomass based on chlorophyll prediction model in Zribar Lake of Kurdestan, a case study

Zaribar Lake is a little shallow lake in Kurdistan province of Iran and it is faced to eutrophication.The study of phytoplankton biomass-nutrient relations is important in eutrophication management and there are many empirical models to predict phytoplankton biomass (chlorophyll a) based on nutrient (nitrogen and phosphorous) amounts in the lake. Evaluation of these empirical models and compar...

Nutrient Cycling in Forests of the Pacific Northwest

Ecosystem analysis has established nutrient cycling as an important area of ecology involving biological, chemical, and geological interactions. Studying the flow of elements through ecosystems provides us with a tool for understanding the functioning of ecosystems. For example, if an ecosystem component has a rapid flux of elements through it, or if it stores large amounts of an element, that ...

Enhancing biological nitrogen fixation in common bean (Phaseolus vulgaris L)

viii CHAPTER 1. GENERAL INTRODUCTION 1 Hypotheses 7 Expected Outcomes 8 References 9 CHAPTER 2. GENOTYPIC VARIATION IN UREIDE CONTENT IN PHASEOLUS VULGARIS L. 19 Abstract 19 Introduction 20 Materials and Methods 21 Results and Discussion 23 Conclusions 28 References 29 CHAPTER 3. SHOOT AND ROOT CONTROL OF UREIDE ACCUMULATION AND PARTITIONING IN PHASEOLUS VULGARIS L. GENOTYPES 46 Abstract 46 Int...

Relating management practices and nutrient export in agricultural watersheds of the United States.

Relations between riverine export (load) of total nitrogen (N) and total phosphorus (P) from 133 large agricultural watersheds in the United States and factors affecting nutrient transport were evaluated using empirical regression models. After controlling for anthropogenic inputs and other landscape factors affecting nutrient transport-such as runoff, precipitation, slope, number of reservoirs...