A pot experiment was carried out to study the phosphrous-sulphur interaction at Department of Agricultural Chemistry and Soil Science, Rajasthan College of Agriculture, Udaipur on a sandy loam soil (Typic Haplustept) medium in P and deficient in S with clusterbean. The treatment consisted of three levels of P (0, 20 and 40 kg P O ha ) and three levels of S (0, 10 and 20 kg ha ) applied from gyp...

The effect of soil moisture on the distribution of Steinernema riobrave in a sand column was determined. Larvae of Pectinophora gossypiella were used to detect S. riobrave infective juveniles (IJ) in each 2.5-cm section of 30-cm-long soil columns. Soil moisture was determined for each section and related to the numbers of nematodes recovered from infected insect baits. Infective juveniles of S....

Methane flux measurements from the soil-grass system were made during the wet season in unperturbed plots and plots where standing dry and green Trachypogon sp. grasses were clipped to just above the soil surface. Results support the surprising discovery that vegetation emits methane. The results of this work allows to infer that the savanna dry/green mixture of grasses produce methane at a rat...

Restoration of wet prairie in the central midwestern United States should include Prairie cordgrass (Spartina pectinata), but historic densities of this once dominant species are not easily achieved. Spartina pectinata was transplanted into a former agricultural field in three planting strategies: 20 small plugs, 4 medium-sized plugs, and a single large plug, with each treatment area totaling 0...

Secondary metabolites released by invasive plants can increase their competitive ability by affecting native plants, herbivores, and pathogens at the invaded land. Whether these secondary metabolites affect the invasive plant itself, directly or indirectly through microorganisms, however, has not been well documented. Here we tested whether activated carbon (AC), a well-known absorbent for seco...

Prep lan t soil appl ica t ions of g r a n u l a r p h e n a m i p h o s effectively reduced Pratytenchus penetrans in soil d u r i n g the seeding year a nd 1 year after, and in the roots of birdsfoot trefoil 2 )'ears af ter seeding. Forage yields were increased in t he season fol lowing appl ica t ion of p h e n a m i p h o s , bu t s tands of p l a n t s / m s were not grea ter (P = 0.05) t ...

Suggested Reading: Jenkinson, D. S. and J. N. Ladd. 1981. Microbial biomass in soil: Measurement and turnover. p. 415-471. In E. A. Paul and J. N. Ladd (eds.), Soil Biochemistry, Volume 5. Marcel Dekker, New York. Tunlid, A and D. C. White. 1992. Biochemical analysis of biomass, community structure, nutritional status, and metabolic activity of microbial communities in soil. p. 229-262. In G. S...