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Results are compared of measuring radiation penetration coefficients using different types of sensor under clear and overcast conditions within a 20- ...Read more
The construction and calibration of a sensor for measuring light interception in crop canopies are described.Read more
The system described samples average atmospheric CO2 content at 6 levels and can detect differences of 0.1 ppm between levels.Read more
A hole (10 cm diam.) made in the ground to below the min. expected depth of water table and lined with wire mesh contains a polythene bottle 'float' t...Read more
An instrument for measuring the distribution of irradiance in grass canopies is described; it demonstrated that light from an overcast sky was more un...Read more
Theoretical considerations indicated that it was possible to increase the precision of estimation of vegetation cover by reducing the number of pins i...Read more
Robust, portable equipment is described for determining infiltration, surface run-off, and soil- and nutrient-erosion characteristics of field sites b...Read more
A new instrument, which is portable, easy to use and gives an immediate digital display of percentage transmission, for measuring the percentage trans...Read more