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Tomato root distribution, yield and fruit quality under subsurface drip irrigation
Machado, Rui; Oliveira, Maria; Portas, CarlosAbstract Tomato rooting patterns were evaluated in a 2-year field trial where surface drip irrigation (R0) was compared with subsurface drip irrigation at 20 cm (RI) and 40 cm (RII) depths. Pot-transplanted plants of two processing tomato, `Brigade' (C1) and `H3044' (C2), were used. The behaviour of the root system in response to different irrigation treatments was evaluated through minirhizotrons installed be...
Effect of drip irrigation and fertilization on tomato rooting patterns
Machado, Rui; Oliveira, Maria; Portas, CarlosAbstract Tomato rooting patterns, root length density (cm/cm3) and root length intensity (cm/cm2), were evaluated in a field trial with pot transplanted plants where three irrigation regimes (0.5, 0.7 and 1 ETm) and three nitrogen application levels: 50, 150 and 250 kg N/ha as Ca (NO3)2 were imposed. Root length was measured from soil-root samples taken with a hand auger, at three distances across the planting ...
MECHANICAL HARVEST OF PROCESSING TOMATOES: INFLUENCE ON PERCENTAGE OF DAMAGED F...
Machado, rui; Rincon, Rodrigue; Portas, CarlosThe mechanical harvesting of processing tomatoes using a "Sandei Bs-81" mechanical harvester increased the percentage of mechanically damaged fruits when compared to manual harvesting. The percentage of fruits without mechanical damage at the end of the unloading belt was almost totally explained by the independent variable, % of green fruits / % of rotten fruits, according to the following adjusted curve y = x...
Two decades of evaluation of processing tomato cultivars in Portugal: Programme...
Machado, Rui; Taborda, Maria; Calado, António; Portas, Carlos sISHS Acta Horticulturae 376: V International Symposium on the Processing Tomato TWO DECADES OF EVALUATION OF PROCESSING TOMATOES CULTIVARS IN PORTUGAL: PROGRAMMES METI, METIBER AND EC-AMITON TRIALS Authors: R.M.A. MACHADO, M.L. TABORDA, A.M. CALADO, C.A.M. PORTAS Abstract: The aim of this presentation is to report on experiments that have been done in Portugal from 1970 to date and also to describe the beh...
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