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....

Improving swine effluent management practices requires understanding of the fate of nutrients derived from swine effluent in soil quality. This study was conducted to evaluate the effects of long-term swine lagoon effluent application on nutrient distribution in an alkaline Okolona silty clay, an acidic Vaiden silty clay, and a Brooksville silty clay loam. Swine effluent has been applied using ...

in this research, effects of subsurface drip irrigation method on soil and tomato yield was investigated under different salinities and two irrigation management strategies: m1= alternating irrigation with fresh water and saline water, and m2= saline water in the first half of each irrigation event and fresh water in the second half. the experiment was conducted in 320 m2 area including 30 plot...

Quantitative recoveries of bacteria added to a number of soils were obtained using fluorescein isothiocyanate (FITC) as a stain. Enzyme fluorescence, using fluorescein diacetate or dibutyrate, could not be adapted for the routine counting of metabolizing organisms in soil. Staining with rose bengal gave recoveries of 60-80%. Soil-extract dilution plates revealed 4 X 107 bacteria/g in the 0-10 c...

BACKGROUND The longevity, mobility and insecticidal activity of bifenthrin at the termiticidal application rate for perimeter treatment were investigated in packed-soil columns in the laboratory and greenhouse. RESULTS Bifenthrin was not detected in the eluates of packed-soil cones over a period of 6 months. In larger pipe plots incorporating bifenthrin into the top 15 cm of the soil, the com...

Recently, water scarcity has become a serious social problem caused by global climate change. In agricultural usage, subsurface irrigation techniques can be an alternative method to save and improve the productivity quality of crops. The technique supplies burying hose 30 cm underground rather than placing it on ground (topsoil), effectively preventing evaporation loss at soil surface. this stu...

Atmospheric nitrogen (N) deposition is changing in both load quantity and chemical composition. The load effects have been studied extensively, whereas the composition effects remain poorly understood. We conducted a microcosm experiment to study how N chemistry affected the soil microbial community composition characterized by phospholipid fatty acids (PLFAs) and activity indicated by microbia...

Shifting cultivation (jhum cultivation), a common practice of converting forest land into agricultural by slash and burn is threatening the ecosystem. This study assesses effect shifting cycles on soil quality in North-eastern Himalayan region using minimum properties. To achieve this goal, index (SQI) approach multivariate techniques were used for surface (0-30 cm) subsurface (30-70 layers soi...

Soil is a precious natural resource, forming the basis for sustained ecosystem services mankind. Its degradation due to ever-increasing anthropogenic influence is, however, threatening food security and quality of environment in many regions. The present investigation was, therefore, undertaken with an objective assessing effect soil water conservation practices bund Fanya juu terrace compared ...