Biological Control Programme is successfully used in control of cottony cushion scale, Icerya purchasi on fruit trees by:
Control of cottony cushion scale, Icerya purchasi on fruit trees by its predatory vedalia beetle, Rodolia cardinalis in Nilgiris. The predator was imported from California in 1929 and from Egypt in 1930 and multiplied in the laboratory and released.
The silk fibres are held together in cocoon by a substance known as……………………
Downward movement of water through saturated soil is called as ___
Which soils are known as self-tilled soils
Which of the following crop is/are soil salinity tolerant?
with the help of ICT, a system to identify, analyse and manage site soil spatial and temporal variability within field for optimum profitability sustai...
Match the following:
1. Soil moisture tension ...
Which of the following property of soil can’t be changed by any means?
Reclammation of acidic soils is done by the use of……………………..
Which of the following primary tillage operation is used to invert the soil partially or completely?
Where is NRSC ( national remote sensing centre) located?
