Volume 59, Issue 3
March 1964, pages 117-184
pp 117-136 March 1964
pp 137-144 March 1964
A piece of petrified palm wood from Mohgaon Kalan resemblingP. sundaram Sahni has been described in this paper. Although it resemblesP. sundaram in most of the characters, yet this speciment shows some important variations fromP. sundaram. It is, therefore, placed provisionally as a new variety ofP. sundaram.
Locality—Mohgaon Kalan area.
Type specimen—M2 (Kept in the Botany Department, Lucknow University).
pp 145-153 March 1964
Combined effect of the pH and temperature showed that the respiration ofL. mauritii is independent of pH of external medium round about habitat temperature.
pp 154-172 March 1964
Some short-period changes in the atmospheric spore content which are associated with changes in the weather and other conditions are described. The influence of various factors on the diurnal periodicities in the air-borne spores of many common constituents of the air-spora at Visakhapatnam and variations in their relative contributions to the total air-spora are illustrated from the 2-hourly changes in six periods selected from a 2-year continuous aerobiological survey conducted at Visakhapatnam using a Hirst trap for air-sampling.
pp 173-184 March 1964
A greater accumulation of total and protein nitrogen was noticed in the blast susceptible type of rice plant than the resistant. Nitrogenous manuring increased the total and protein nitrogen content in both the types but still the total and protein nitrogen content in both the types but still the susceptible types had higher amounts of these than the resistant. The influence of manuring was reflected greatest during the tillering and earhead stages at which periods the rice plant is most susceptible to blast disease. The susceptible variety had a much lower C/N ratio than the resistant in the unmanured series, but with nitrogenous manuring the C/N ratio was similar in both types.