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Earl Schultz

Essential Plant Nutrients - 1 views

www.cartage.org.lb/...EssentialPlant.htm

shared by Earl Schultz on 09 Apr 10 - Cached
  • Plants require 13 mineral nutrient elements for growth
  • Macronutrients (nitrogen, phosphorus, potassium, calcium, magnesium and sulfur) are plant nutrients required in the largest amount in plants. Micronutrients (iron, copper, manganese, zinc, boron, molybdenum and chlorine) are required in relatively smaller amounts. Additional mineral nutrient elements which are beneficial to plants but not necessarily essential include sodium, cobalt, vanadium, nickel, selenium, aluminum and silicon
    • bacoco coco
      bacoco coco on 09 Apr 10
       
      Nutrients (in the soid) are needed either in large amounts (macronutrients), medium amounts (micronutrients), or in trace amounts
  • ...6 more annotations...
  • Five types of deficiency or toxicity symptoms are observed:
    • bacoco coco
      bacoco coco on 09 Apr 10
       
      Here are the visible signs if the soil does not have enough of or too much of a nutrient.
  • A nutrient deficiency occurs when the nutrient is not in sufficient quantity to meet the needs of the growing plant. Nutrient toxicity occurs when a plant nutrient is in excess and decreases plant growth or quality
    • bacoco coco
      bacoco coco on 09 Apr 10
       
      Plants can be damaged is there is too much of one nutrient (toxicity) or not enough of a nutrient (deficiency).
  • Essential plant nutrients: their relative amounts in plants, functions and classification
    • bacoco coco
      bacoco coco on 09 Apr 10
       
      This table may be helpful in determining a topic for an experiment. You would only want to choose one nutrient with which to run an experiment.
  • Table 2. Generalized Symptoms of Plant Nutrient Deficiency or Excess
    • bacoco coco
      bacoco coco on 12 Apr 10
       
      This table will be very helpful as a visual aid for determining if your experiment is functioning properly. Remember, you can only experiment on one nutrient at a time.
  • Earl Schultz on 13 Apr 10
     
    This page deals with the nutrients required for plant survival and plant growth. As well as the substances which are hazardous to plant growth and what complications can arise when these complications occur.
Trey Pettus

AccessScience | Encyclopedia Article | Soil fertility - 2 views

www.accessscience.com/abstract.aspx

shared by Trey Pettus on 13 Apr 10 - Cached
  • Earl Schultz on 13 Apr 10
     
    This page elaborates on the Essential Plant Nutrients. This time, talking about the nutrients that are found in the soil itself.
  • Trey Pettus on 13 Apr 10
     
    The project that i would like to do would have something to do with different soils and the different amount of nutrients' they contain effects on the plants.
Judi Crouch

Hypoxia in the Northern Gulf of Mexico - 2 views

www.gulfhypoxia.net/Overview

Crouch

shared by Judi Crouch on 12 Apr 10 - Cached
  • Hypoxia, or oxygen depletion, is an environmental phenomenon where the concentration of dissolved oxygen in the water column decreases to a level that can no longer support living aquatic organisms.
  • Hypoxic and anoxic (no oxygen) waters have existed throughout geologic time, but their occurrence in shallow coastal and estuarine areas appears to be increasing as a result of human activities (Diaz and Rosenberg, 1995). The largest hypoxic zone currently affecting the United States, and the second largest hypoxic zone worldwide, occurs in the northern Gulf of Mexico adjacent to the Mississippi River on the Louisiana/Texas continental shelf.
  • What causes hypoxia? Major events leading to the formation of hypoxia in the Gulf of Mexico include: Freshwater discharge and nutrient loading of the Mississippi River Nutrient-enhanced primary production, or eutrophication Decomposition of biomass by bacteria on the ocean floor Depletion of oxygen due to stratification
  • ...5 more annotations...
  • Mississippi River nutrient concentrations and loading to the adjacent continental shelf have greatly changed in the last half of the 20th century. During this time there has been a marked increase in the concentration of nitrogen and phosphorous in the Lower Mississippi River. This increase has been attributed to the increased use of nitrogen and phosphorous fertilizers,
  • Eutrophication
  • eutrophication initiates a massive growth of phytoplankton on the water’s surface.
  • This stratification leaves the bottom layer isolated from the surface layer and cut off from a normal resupply of oxygen from the atmosphere.
  • Hypoxia was first documented in the northern Gulf of Mexico off the Louisiana coast in 1972.
  • Judi Crouch on 12 Apr 10
     
    Good intro to the concept of "dead zones" (hypoxia)
  • Judi Crouch on 12 Apr 10
     
    This is a good introduction to the concept of a "dead zone."
  • Judi Crouch on 12 Apr 10
     
    What does anthropogenically mean?
Mason Medart

Are Electrolytes Good For Plants - 0 views

www.jstor.org/81410

mason medart

shared by Mason Medart on 13 Apr 10 - No Cached
  • Mason Medart on 13 Apr 10
     
    certain electrolytes allow nutrients to move through the plant cell membrane, possibly allowing for quicker growth which could be essential for a plants survival if it needs to grow faster than a weed or something harmful to it.
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