2.1.3.2. Minimum-tillage.The term minimum tillage has caused
the greatest confusion because the minimum cultivation required
to grow a crop varies from zero to a complete range of primary and
secondary tillage operations depending on soil properties and
crops. It is commonly defined as the minimum soil manipulation
necessary for crop production or meeting tillage requirements
under the existing soil and climatic conditions. It often means any
system that has few tillage requirements. It may also mean tillage
of any part of the land, e.g. strip tillage or zonal tillage. It could also
refer to a ‘‘stale-bed’’ in which the soil is ploughed at the end of the
previous crop cycle. The crop is then seeded with a minimum of
seedbed preparations performed at the onset of the next rains. This
is commonly recommended for soils in the semi-arid tropics in
West-Africa (Charreau and Nicou, 1971).
Major advantages of the system includes: quick warm of
residue tilled residue-free strip, injection of nutrients into row area
and its suitability for poorly drained soils. The disadvantages
involve the cost of preplant operation, too much drying, crusting
and eroding of strips without residue may occur and the system
may not be suitable for drilled crops. A number of minimum tillage
practices are adopted around the world, which among others
include the followings:
2.1.3.2. Minimum-tillage.The term minimum tillage has caused
the greatest confusion because the minimum cultivation required
to grow a crop varies from zero to a complete range of primary and
secondary tillage operations depending on soil properties and
crops. It is commonly defined as the minimum soil manipulation
necessary for crop production or meeting tillage requirements
under the existing soil and climatic conditions. It often means any
system that has few tillage requirements. It may also mean tillage
of any part of the land, e.g. strip tillage or zonal tillage. It could also
refer to a ‘‘stale-bed’’ in which the soil is ploughed at the end of the
previous crop cycle. The crop is then seeded with a minimum of
seedbed preparations performed at the onset of the next rains. This
is commonly recommended for soils in the semi-arid tropics in
West-Africa (Charreau and Nicou, 1971).
Major advantages of the system includes: quick warm of
residue tilled residue-free strip, injection of nutrients into row area
and its suitability for poorly drained soils. The disadvantages
involve the cost of preplant operation, too much drying, crusting
and eroding of strips without residue may occur and the system
may not be suitable for drilled crops. A number of minimum tillage
practices are adopted around the world, which among others
include the followings:
การแปล กรุณารอสักครู่..
