PEAR TREE YIELD MAPPING
In the last few years, the precision agriculture has turned to other crops besides cereals, and among them is precision horticulture. While pear is one of the favorite temperate climate fruits in Brazil, only 16,000 metric tons are produced in the country. The objective of this study was to map the yield of pear trees aiming at analyzing production spatial variability, as well as to compare it with spatial variability of the soil and plant attributes. The experimental field had 146 pear trees, var. Pêra dágua, distributed on a 1.24 ha area. Four harvesting methods were used based on the fruit maturity, and only the ripe fruits were harvested each time. In each harvest, the weight of all mature fruits per plant was computed and these data were then added to obtain the total yield. The analyzed soil attributes included: P, K, Ca, Mg, Al3+, pHCaCl2, C, Cu, Zn, Fe, Mn, and base saturation, and the plant attributes were: fruit length and diameter. Yield had low correlation with soil attributes. Levels of spatial dependence were found to be low for fruit length, moderate for P, K, Ca, Mg, pHCaCl2, Cu, Zn, Fe, base saturation and diameter, and high for C, Mn, and yield.
Konopatzki, M.R.S., Souza, E.G., Nóbrega, L.H.P., Uribe-Opazo, M.A., Suszek, G., Rodrigues, S. and de Oliveira, E.F. (2009). PEAR TREE YIELD MAPPING. Acta Hortic. 824, 303-312
horticulture, precision agriculture, thematic map