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The design of an instrument for the simultaneous measurement of photosynthetically active radiation and red, far-red and blue light is described. The ...Read more
A new, low-cost field instrument for determination of water levels, which records the highest and lowest levels attained between site visits, is descr...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
Details are given of the construction of a diffusion porometer for measuring stomatal resistances of leaf surfaces, based on principles described in H...Read more
A miniature version (suitable for measuring radiation in herbage and short grass) of an instrument described previously [see H.A., 35: 223]....Read more