By Stephen R. Gliessman

Reviews OF ENVIRONMENTAL FACTORSEffect of Microclimate on Seed GerminationLight Transmission and the Vegetative CanopySoil TemperatureSoil Moisture ContentSoil homes AnalysisCanopy Litterfall AnalysisMulch process ComparisonRoot procedure reaction to Soil TypeSTUDIES OF inhabitants DYNAMICS IN CROP SYSTEMSIntraspecific Interactions in a Crop PopulationManagement background and the Weed SeedbankComparison of Arthropod Read more...

summary: reports OF ENVIRONMENTAL FACTORSEffect of Microclimate on Seed GerminationLight Transmission and the Vegetative CanopySoil TemperatureSoil Moisture ContentSoil homes AnalysisCanopy Litterfall AnalysisMulch method ComparisonRoot approach reaction to Soil TypeSTUDIES OF inhabitants DYNAMICS IN CROP SYSTEMSIntraspecific Interactions in a Crop PopulationManagement heritage and the Weed SeedbankComparison of Arthropod PopulationsCensus of Soil-Surface FaunaSTUDIES OF INTERSPECIFIC INTERACTIONS IN CROPPING COMMUNITIESBioassay for Allelopathic PotentialRhizobium Nodulation in LegumesEffects of Agroe

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Additional info for Field and Laboratory Investigations in Agroecology, Second Edition

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These measurements are used to characterize and interrelate the light environment and canopy structure of each system and provide useful information on how each system absorbs and captures sunlight. indd 15 10/27/06 1:29:21 AM 16 Field and Laboratory Investigations in Agroecology Objectives • Investigate how light is distributed in and absorbed by an agroecosystem. • Get an impression of how agroecosystems vary in their canopy structures and internal light environments. • Compare the effects of different cropping structures on the internal light environment.

The method for choosing the locations can vary depending on the size of the system, the time available, and the desired degree of randomness. Two basic methods are outlined below. Method A. Extend 10 m of a meter tape and lay it down diagonally through the system. Take ­temperature measurements every 25 cm along the tape. Method B. Establish a baseline along one edge of the plot or bed. , by generating five random numbers in the 0–100 range, each of which corresponds to the number of decimeters from one end of a 10-m baseline).

Establish a baseline along one edge of the plot or bed. , by generating five random numbers in the 0–100 range, each of which corresponds to the number of decimeters from one end of a 10-m baseline). , 8 m) into the bed or plot, perpendicular to the baseline. , every meter along 8-m transects). 2. At each of the locations established in step 1, use a temperature probe to measure the temperature at the soil surface, 5 cm below the surface and 15 cm below the surface. In mulched systems, the soil surface is defined as the surface of the soil proper, not the surface of the mulch or the soil covering.

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