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In recent years, yields for cereal crops in sub-Saharan Africa were less than half of South Asia's and one-third of Latin America's, the evaluation said.
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On average, the Sri Lankan yields for cereals and pulses are higher and those for roots and tubers are lower than those of the neighboring countries.
Yields for cereals produced with irrigation exceeded rainfed yields by 115percentt in developing countries collectively and by 150percentt in sub-Saharan Africa and West Asia/North Africa in 1995.
Although yields for irrigated cereal production in developing countries are increasing by 1.2percentt per year, it is at a reduced rate relative to 1982-1995 (1.9 percent per year).
For developing countries collectively, average weighted yields for irrigated cereal production are expected to increase by 1.4 tonnes/ ha, compared with an increase of 0.5 tonnes/ha for rainfed cereals between 1997/99 and 2030 (Bruinsma, 2003).
In Africa, yields for important cereals (e.g., maize) have stagnated at 1 t ha−1 due to land degradation, low fertilizer use and water stress.
However, higher initial yields for irrigated cereals will result in greater absolute increases over this period.
Increases in yields for irrigated cereals in developing countries are expected to be of a similar proportion to increases in yields for rainfed cereals in the period 1997/99-2030 (annual increases of 0.9 and 0.8percentt, respectively).
Returns to investment in fertilizer can be highly variable for smallholder farmers, and small-scale farms in Asia often only achieve 40-65% of their potential yield for common cereal crops.
In 2012‒2014, forage yields were measured on farms for cereal rye and triticale to document yield potentials and expected yields for these winter forages grown in corn-cereal rotations in New York.
Its fertile lands produce heavy yields of cereals, sugar beets, and vegetables.
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