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Iowa State University

Plant Sciences

Soybean

Retrospective Theses and Dissertations

Articles 1 - 21 of 21

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Mycorrhizal Fungi-Bradyrhizobium-Soybean Tripartite Symbiosis In Iowa Soils , Samina Khalil Jan 1991

Mycorrhizal Fungi-Bradyrhizobium-Soybean Tripartite Symbiosis In Iowa Soils , Samina Khalil

Retrospective Theses and Dissertations

Soybean [Glycine max (L.) Merr.] makes use of two important symbiotic microbial systems: the rhizobial system, in which Bradyrhizobium japonicum fix atmospheric N2 in root nodules, and the vesicular-arbuscular mycorrhizal system, in which VAM fungi increase uptake of phosphate and/or other nutrients from the soil or improve plant drought tolerance. Research has confirmed the advantage of bradyrhizobial and mycorrhizal associations in N and P deficient soils; however, these associations may be inhibitory, or have little effect on plant growth in well-fertilized soils. In Iowa over the past 30-40 years, farmers have been adding large quantities of fertilizers to get ...


Net Photosynthesis And Evapotranspiration Of Field-Grown Soybean Canopies , Wayne Robert Hansen Jan 1972

Net Photosynthesis And Evapotranspiration Of Field-Grown Soybean Canopies , Wayne Robert Hansen

Retrospective Theses and Dissertations

No abstract provided.


Soybean Response To Nitrogen Fertility, Photoperiod, Root Pruning, Kinetin And Shoot Apex Removal , David Lee Stamp Jan 1971

Soybean Response To Nitrogen Fertility, Photoperiod, Root Pruning, Kinetin And Shoot Apex Removal , David Lee Stamp

Retrospective Theses and Dissertations

No abstract provided.


Effect Of Tiba On The Action Of 2, 4-D On Plants , Evaristo Lazo Jan 1971

Effect Of Tiba On The Action Of 2, 4-D On Plants , Evaristo Lazo

Retrospective Theses and Dissertations

No abstract provided.


Remote Detection Of Moisture Stress: Field And Laboratory Experiments , Richard Eugene Carlson Jan 1971

Remote Detection Of Moisture Stress: Field And Laboratory Experiments , Richard Eugene Carlson

Retrospective Theses and Dissertations

No abstract provided.


Net Photosynthesis Of Soybean Leaves As Influenced By Anatomy, Respiration, And Variety , Gary Marvin Dornhoff Jan 1971

Net Photosynthesis Of Soybean Leaves As Influenced By Anatomy, Respiration, And Variety , Gary Marvin Dornhoff

Retrospective Theses and Dissertations

No abstract provided.


Dry Matter Changes And Carbohydrate Metabolism Of Germinating Soybeans , Abdul Hyatt Wahab Jan 1971

Dry Matter Changes And Carbohydrate Metabolism Of Germinating Soybeans , Abdul Hyatt Wahab

Retrospective Theses and Dissertations

No abstract provided.


Physiological And Biochemical Changes And Field Performance Of Deteriorated Soybean Seeds , Oghenetsavbuko Todo Edje Jan 1970

Physiological And Biochemical Changes And Field Performance Of Deteriorated Soybean Seeds , Oghenetsavbuko Todo Edje

Retrospective Theses and Dissertations

No abstract provided.


Physiological Bases For The Temperature-Dependent Short Growth Of Hypocotyls In Some Varieties Of Soybean , Cyrus Samimy Jan 1970

Physiological Bases For The Temperature-Dependent Short Growth Of Hypocotyls In Some Varieties Of Soybean , Cyrus Samimy

Retrospective Theses and Dissertations

No abstract provided.


Bacteria-Free Soybean Plants , Jerry Fred Strissel Jan 1970

Bacteria-Free Soybean Plants , Jerry Fred Strissel

Retrospective Theses and Dissertations

No abstract provided.


Populations Of Rhizobium Japonicum In Iowa Soils And Inoculum Level Needed For Nodulation Of Glycine Max (L.) Merrill , Richard Wayne Weaver Jan 1970

Populations Of Rhizobium Japonicum In Iowa Soils And Inoculum Level Needed For Nodulation Of Glycine Max (L.) Merrill , Richard Wayne Weaver

Retrospective Theses and Dissertations

No abstract provided.


The Effects Of Environmental Variables And Plant Morphology On Leaf Resistances, Leaf Temperatures And Relative Water Content In Soybeans , Kenneth Ross Stevenson Jan 1969

The Effects Of Environmental Variables And Plant Morphology On Leaf Resistances, Leaf Temperatures And Relative Water Content In Soybeans , Kenneth Ross Stevenson

Retrospective Theses and Dissertations

No abstract provided.


Natural And Induced Variation In Soybean Seed Quality During Maturation , Robert Benjamin Metzer Jan 1967

Natural And Induced Variation In Soybean Seed Quality During Maturation , Robert Benjamin Metzer

Retrospective Theses and Dissertations

No abstract provided.


Differential Responses Of Soybean Varieties To Application Of Phosphorus, Potassium And Calcium Carbonate Materials With Respect To Leaf Composition And Yield , Cornelis Jacobus De Mooy Jan 1965

Differential Responses Of Soybean Varieties To Application Of Phosphorus, Potassium And Calcium Carbonate Materials With Respect To Leaf Composition And Yield , Cornelis Jacobus De Mooy

Retrospective Theses and Dissertations

No abstract provided.


Kinetics Of Photosynthate Translocation, Donald Boyd Fisher Jan 1965

Kinetics Of Photosynthate Translocation, Donald Boyd Fisher

Retrospective Theses and Dissertations

No abstract provided.


Effect Of Growth Regulators On Reproduction In Soybeans , Howard A. L. Greer Jan 1964

Effect Of Growth Regulators On Reproduction In Soybeans , Howard A. L. Greer

Retrospective Theses and Dissertations

No abstract provided.


Developmental Vegetative Morphology Of Glycine Max , Jerome P. Miksche Jan 1959

Developmental Vegetative Morphology Of Glycine Max , Jerome P. Miksche

Retrospective Theses and Dissertations

No abstract provided.


A Phenological Study Of Soybeans In Iowa And Ontario, Canada , Donald Murray Brown Jan 1958

A Phenological Study Of Soybeans In Iowa And Ontario, Canada , Donald Murray Brown

Retrospective Theses and Dissertations

No abstract provided.


Floral Induction In Soja Max , John Edwin Fisher Jan 1953

Floral Induction In Soja Max , John Edwin Fisher

Retrospective Theses and Dissertations

No abstract provided.


Translocation In Soybean Plants , Leo Preston Vernon Jan 1951

Translocation In Soybean Plants , Leo Preston Vernon

Retrospective Theses and Dissertations

No abstract provided.


Chemical Investigations Of The Effect Of Fertilizer Ratios And Green Manures On Yields And Composition Of Crops And The Organic Matter In Norfolk Sand , James Edward Adams Jan 1936

Chemical Investigations Of The Effect Of Fertilizer Ratios And Green Manures On Yields And Composition Of Crops And The Organic Matter In Norfolk Sand , James Edward Adams

Retrospective Theses and Dissertations

The data presented have been obtained from a combined field and laboratory study conducted on Norfolk sand; this type of soil is prevalent throughout the sand-hill region of the Carolinas and Georgia. Investigations concerning the relative efficiencies of fertilizers and crop residues as sources of nitrogen for corn and cotton have been made. These involved a comparison of legumes used as green manures; i.e., soybeans, velvet beans, and cowpeas, with only the stubble turned; a low-nitrogen fertilizer was applied to the crops grown on the green manure plats, while a high-nitrogen ratio was used on the stubble plats. These ...