منابع مشابه
Fertigation of Deciduous Fruit Trees: Apple and Sweet Cherry
Nutrient uptake by trees is determined by root interception, soil availability, and tree demand. Fruit trees have low rooting density, especially in the case of dwarfing rootstocks. Mobility in the soil is a key factor in determining nutrient availability, and good management of nutrients requires that supply is matched to demand, in terms of amount, timing and retention in the root-zone, and t...
متن کاملSpring frosts in deciduous fruit trees Ð morphological damage and ̄ower hardiness
Freeze injury is one of the main limiting factors to crop production and distribution of horticultural crops. Despite the numerous research efforts devoted to reduce freezing injury, it still accounts for greater losses of fruits and vegetables than any other environmental or biological hazard and the ultimate causes determining cold hardiness remain uncertain. In temperate climates, important ...
متن کاملFeatures and Classification Methods to Locate Deciduous Trees in Images
We compare features and classification methods to locate deciduous trees in images. From this comparison we conclude that a backpropagation neural network achieves better classification results than the other classifiers we tested. Our analysis of the relevance of 51 features from seven feature extraction methods based on the graylevel co-occurrence matrix, Gabor filters, fractal dimension, ste...
متن کاملGrowth Responses to Flooding and Recovery of Deciduous Trees
Tree seedling flooding tolerance for 22 species was assessed under controlled field condi tions. Initial heights under control (freely draining soil, n = 20 per species) and flooded (stand ing water, depth = 10 cm, n = 20 per species) conditions were measured in March 1990. Sur vival, height and diameter growth were determined after 120 days. Recovery from flooding effects was assessed in th...
متن کاملHow strong is intracanopy leaf plasticity in temperate deciduous trees?
Intracanopy plasticity in tree leaf form is a major determinant of whole-plant function and potentially of forest understory ecology. However, there exists little systematic information for the full extent of intracanopy plasticity, whether it is linked with height and exposure, or its variation across species. For arboretum-grown trees of six temperate deciduous species averaging 13-18 m in he...
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ژورنال
عنوان ژورنال: New Zealand Journal of Agricultural Research
سال: 1971
ISSN: 0028-8233,1175-8775
DOI: 10.1080/00288233.1971.10427115