Technology And Sustainability For The
Development Of The Caldenal
Author(s)
H. E. Laborde, R. E. Brevedan & M. N. Fioretti
Abstract
The Caldenal is a temperate semi-arid region located in the central part of
Argentina and comprises an area of about 40,000 km2. It is located in the ecotone
between the cultivated humid Pampa to the east and the arid Monte to the west.
The region is characterized by a highly variable annual and seasonal
distribution of rainfall (400-600 mm) concentrated in spring and fall. Average
annual potential evapotranspiration is 800 mm. The average annual temperature
is 15-16°C. Soils are mainly Calciustolls with a petrocalcic horizon at a depth
varying from 0.5 to 2 m.
Cattle raising, based on cow-calf operations, is the most important economic
activity in the Caldenal where stocker calves are raised to be fattened later in the
more humid Pampa. The ranchers in Caldenal practice continuous grazing with
very high grazing pressure, that has resulted in a severe overgrazing. Stocking
rates are approximately 7 ha cow-1 yr-1.
Currently the area supports an increasing pressure over its grass herbaceous
resources. On the other hand, the humid Pampa is increasingly devoted to cash
crop cultivation, mainly soybean. This causes a displacement of cattle breeding
and fattening enterprises to more marginal areas. As a result, some feed-lot
businesses are being located in the Caldenal region nowadays.
The Caldenal region appears suitable for a more intensive agricultural use. In
an attempt to find a cropping strategy that reduces the constraints of climate and
soil a non-tillage, legume ley farming system based on improved high-yielding
pasture legumes is proposed in the Caldenal.
Keywords: Caldenal, rangeland, livestock production, medics, ley farming.
Keywords
Caldenal, rangeland, livestock production, medics, ley farming.
Related Book
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