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Using a simulation model as an analysis tool, the economic impact of spittlebugs in pastures of Colombia was quantified in terms of animal production. Three levels of abundance (10, 25, 50 adults/m2 ) and farm area affected (25, 50, 100%) were evaluated using data obtained in Brazil for Notozulia...


Holmann, Federico J.Peck, DC[Economic damage caused by spittlebugs (Homoptera: Cercopidae) in Colombia: A first approximation of impact on animal production in Brachiaria decumbens pastures]Economic damage caused by spittlebugs (Homoptera: Cercopidae) in Colombia: A first approximation of impact on animal production in Brachiaria decumbens pastures

Results of preliminary experimentation with a computer based simulation model of beef production in theEastern Savannas of Colombia are reported The energetic consequences of various uses of sown pasturesare examined with reference to their long term biological feasibility The quality of grass le...


Thornton, Philip K.[Computer experimentation with an energy-based simulation model of animal production in the eastern savannas of Colombia]Computer experimentation with an energy-based simulation model of animal production in the eastern savannas of Colombia

Two experiments were conducted in the neotropical savannas of Carimagua, Colombia to test the hypothesis that Brahman females subjected to sustained grazing undernutrition as heifers can attain high reproductive performance as mature cows if allowed to make compensatory gains. In Experiment 1, we...


Vera, Raúl R.Ramírez, C.A.Velásquez, N.[Growth patterns and reproductive performance of grazing Brahman cows in a tropical environment]Growth patterns and reproductive performance of grazing Brahman cows in a tropical environment

Resource flow models are useful tools that assist farmers in analysing their soil fertility management strategies and in planning, experimenting and adapting ways to improve the use of scarce local resources. Resource flows and farm nutrient balance studies were carried out in eastern Uganda to a...


Esilaba, Anthony O.Nyende, PNalukenge, GByalebeka, J.B.Delve, Robert J.Ssali, H.[Resource flows and nutrient balances for crop and animal production in smallholder farming systems in Eastern Uganda]Resource flows and nutrient balances for crop and animal production in smallholder farming systems in Eastern Uganda
Cook, Simon E.Andersson, Meike S.Fisher, Myles J.[Assessing the importance of livestock water use in basins]Assessing the importance of livestock water use in basins
Tergas, Luis EduardoPaladines M., Osvaldo L.Kleinheisterkamp, IngoVelásquez R., J.E.[Animal production from native pastures with complementary grazing of Pueraria phaseoloides in the Eastern Plains of Colombia]Animal production from native pastures with complementary grazing of Pueraria phaseoloides in the Eastern Plains of Colombia
Tergas, Luis EduardoPaladines M., Osvaldo L.Kleinheisterkamp, IngoVelásquez R., J.E.[The animal production potential of four associations between Andropogon gayanus Kunth and legumes in the Eastern Plains in Colombia]The animal production potential of four associations between Andropogon gayanus Kunth and legumes in the Eastern Plains in Colombia

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