In 1959, an N‐P‐K ratio of 9.1‐1‐3.8 (4‐1‐2 N‐P2O5‐K2O ratio) was proposed as the proper nutrient balance for fertilizing ‘Coastal’ bermudagrass [Cynodon dactylon (L.) Pers.] for forage, but nutrient removal in forage was not taken into consideration with this ratio. The purpose of the study was to determine fertilizer effects on removal of P and K in ‘Coastal’ bermudagrass forage using increments of a fixed N‐P‐K ratio and high rates of P and K over a range of N rates. An established sod which had not received fertilizer for at least 5 years was selected for the 3‐year study. The soil was a Fuquay loamy sand (loamy, siliceous, thermic arenic Plinthic Paleudult) which was medium in P and low in K. Annual treatments for the first 2 years were 84,168,336, and 672 kg N ha−1 applied with P and K in a 9.1‐1‐5.7 N‐P‐K ratio (4‐1‐3 N‐P2O5‐K2O ratio). In the 3rd year 73.6 kg P ha−1 and 420 kg K ha−1 were applied uniformly at all N rates. The 9.1‐1‐5.7 N‐P‐K ratio supplied inadequate amounts of P and K to compensate for crop removal at the lower fertilizer rates but were excessive at the higher fertilizer rates. The N‐P‐K ratio required the 3rd year to supply P and K equivalent to that removed in the forage ranged from 6.4‐1‐6.5 for the 84 kg N ha−1 treatment to 14.4‐1‐7.9 for the 672 kg N ha−1 treatment. This study indicates that the use of regression equations for determining P and K needs for Coastal bermudagrass is a more suitable method than the N‐P‐K ratio method.

This study was undertaken to explore the human body for GSR sites, which would parallel palmar GSR activity, but would not impede the subject or be prone to artifact. Specific resistance values ranged from 10,000 to 800,000 ohm‐cm2. Specific resistance of the scalp was consistently lower than other areas. Spontaneous activity was observed at all non‐palmar, non‐plantar sites except the scalp. At times, this activity was found to be present when the palm was quiescent. Evoked non‐palmar, non‐plantar activity was found to be present irregularly, but was always accompanied by evoked palmar responses. Non‐palmar, non‐plantar sites responded to exertional stimuli with rhythmic, 16–21 per minute, GSR activity. Some subjects demonstrated this rhythmic activity spontaneously, and one subject revealed abrupt suppression of this phenomenon in response to psychosensory stimulation. Medial and lateral hypomalleolar areas of the ankle were found to parallel plantar specific GSR responses and are recommended as useful GSR skin sites under conditions of moderate arousal.

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Phosphorus extractants have not been tested extensively in the Southeast. An experiment was carried out to compare four P extractant methods using samples from a field P-K factorial experiment with soybeans (Glycine max (L.) Merr.) at three locations in Georgia over four years. There were five P rates ranging from none to 80 kg ha -1 . Soils and plant tissue were sampled at mid-summer and yields were recorded. The four P extractants compared were Olsen, Mehlich 1, Mehlich 2, and Bray 1. Quadratic regressions for soil P versus plant P and P rates were not significant compared to linear regressions. There were no significant yield responses to P. All extractants except Olsen were similar in their response to added fertilizer P as measured by linear r 2 values. Olsen P gave lower linear r 2 values both with P rate and with plant P. Mehlich 1 values were highly correlated with Mehlich 2 (0.94**) and Bray 1 (0.96**).Mehlich 2 and Bray 1 gave nearly the same soil P values with linear regressions of slope of 1.0 and low intercepts. Results from these experiments show that Mehlich 1, Mehlich 2, or Bray 1 could be used successfully on these soils, but that Olsen should be avoided. INTRODUCTIONPhosphorus is one of the most elusive of the major plant nutrients because it is difficult to find soil testing extractants which will predict plant response under a wide variety of soil conditions. The reasons for this problem lie in the many chemical forms of soil P and the reversion of soluble fertilizer P to less chemically soluble, less plant available forms. A soil extractant that will dissolve some types of P compounds may work well in certain soil types but fail in others.In 1978 Mehlich devised a universal soil test for Southeastern acid soils known as Mehlich 2 (1). The P extracted with Mehlich 2 compared well with P uptake by millet as did P extracted by the Bray 1 (2) and Mehlich 1 test (3), also known as double acid. The Olsen P test (4) devised especially for calcareous soils did not predict P uptake as well as those other three for the acid soils of the Southeast. Aquino and Hanson (5) tested P extractants in five Missouri soils using sorghum in the greenhouse. They found that the best extractant depended on the soil type, but Bray 1 and 2 and Mehlich 2 were better than dilute SrCl 2 , "P buffering index", or Mehlich 1. Bray 1 was also the best predictor of P response in 44 acid (pH <5.6) soils planted to wheat (6). Of the other seven tested, Mehlich 1 and Olsen performed best after Bray 1. Yost et aï. (7) found Mehlich 1 to overestimate available P where rock phosphate had been applied, whereas Olsen and Bray 1 performed adequately. Finally, in Southeastern soils the best predictors of labile P were Olsen and Mehlich 1 after separating the soils into textura! class groups (8).

This electrode system for electrocardiography and impedance pneumography is an extension of the one used on Project Mercury, Detailed description is given of the manufacturing procedure for the silver‐silver chloride electrodes, for the preparation of a non‐irritating electrode paste and for the application of the electrodes. Tests were made on 21 subjects up to 90 hours. Only nine electrodes failed during the entire test during which subjects engaged in active sports, bathed, etc. Irritation of the skin was minimal.