Where sand dunes normally occur?

A three year old plant of poplar and Tamarix gallica consumes ________ liters and ____ liters of water per day, respectively under optimum supply conditions:

In order to overcome this shortcoming, an appropriate development programme will be undertaken with emphasis on:

At which latitude, heat grain through insolation approximately equals heat loss through terrestrial radiation?

The following radioactive isotopes are formed by nuclear fission:

Sarrothripus diplographa Hams: (Notuidae – Lepidoptera) control is: