Glossary - Afforestation, Reforestation and Forest Restoration in Arid and Semi-arid Tropics - page 260

Gabion A netting of steel wire filled with earth or rocks and used as a support or
abutment. Gabions can be more effective as check dams because being enmeshed
the structure is less likely to be washed away by the current of water.

Gangway Passageway between beds in a nursery to enable workers to have access
for working.

Garden plants Plants, usually with ornamental flowers and foliage, normally found

in gardens.

Germination bed ⇒ Bed

Global positioning system An electronic device guided by a network of satellites
meant to locate a place on earth's surface in terms of the latitude-longitude co-
ordinates. A modern GPS can locate an object to an accuracy of less than 1 m.

GLR ⇒ Ground level (water) reservoir

GPS ⇒ Global positioning system

Grade out losses Losses on account of discarding plants that do not meet the quality
standards during the grading operation.

Gradeout A plant specimen in nursery rejected on account of poor health, size, or
quality.

grading Sorting or arranging plants in a nursery in order to remove certain fraction
of them that are poorest in terms of quality.

Gradone A narrow bench terrace running on contour, usually with small inward
transverse slope.

Gradoni Plural of gradone.

Grafting An asexual method of plant propagation wherein a cutting of desired plant
material, the scion, is spliced with the rootstock and tied firmly so that the two fuse
together and become one plant.

Grazing pressure The intensity and extent of grazing in an area. The number of
cattle per unit area and the period of grazing (whether throughout the year or in a
season only) are the principal characteristics defining grazing pressure.

Ground level reservoir A water reservoir constructed on ground surface. It can be
made of concrete or masonry. Although a little expensive compared to an underground
water reservoir, it affords some pressure head for driving flow of water to enable
irrigation of nursery beds with a pipe and a rose-spray.

Growing bed ⇒ Bed

Growth cline Gradient of variable growth in a group of plants in nursery or field
along a line of environmental, climatic, or edaphic transition. In a nursery, it is
unequal availability of irrigation water which commonly causes growth clines.