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Converging air jets in orchard spraying : influence on deposition, air velocities and forces on trees /Svensson, Sven Axel, January 1900 (has links) (PDF)
Diss. (sammanfattning) Alnarp : Sveriges lantbruksuniv., 2001. / Härtill 4 uppsatser.
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Population studies of arthropods on apple trees in North-East England, with particular reference to mussel scale, Lepidosaphes ulmi (L.)Farooq-Ahmad, Khawaja January 1995 (has links)
No description available.
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Ecology and management of Uapaca kirkiana in southern AfricaNgulube, Mzoma R. January 1996 (has links)
No description available.
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The role and function of fruit trees and fruit tree-based agroforestry systems in a highland watershed in northern Thailand /Withrow-Robinson, Bradford A. January 2000 (has links)
Thesis (Ph. D.)--Oregon State University, 2001. / Typescript (photocopy). Includes bibliographical references. Also available on the World Wide Web.
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Chemical thinning of European pear cultivars (Pyrus communis L.) /Chabikwa, Tinashe Gabriel. January 2008 (has links)
Thesis (MScAgric)--University of Stellenbosch, 2008. / Bibliography. Also available via the Internet.
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Nutrient requirement and distribution of intensively grown 'Brookfield Gala' apple trees /Kangueehi, Grace Nandesora. January 2008 (has links)
Thesis (MScAgric)--University of Stellenbosch, 2008. / Bibliography. Also availabe via the Internet.
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Foliar application of nitrogen to peach treesLarsen, Robert Paul. January 1951 (has links)
Call number: LD2668 .T4 1951 L37 / Master of Science
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Floral biology of cupuassu (Theobroma grandiflorum (Willdenow ex Sprengel) Schumann)Venturieri, Giorgini Augusto January 1994 (has links)
Cupuassu (Theobroma grandiflorum), one of the most profitable crops of Amazonia, is now attracting world-wide attention as an exotic fruit, used in juices, ice cream and sweets. It is a shade tolerant tree that can be grown as a component of agroforestry systems. Nevertheless it is still a wild species and little is known about its biology. Floral biology of cupuassu was studied in Belem-Brazil during 2 floweringfruiting seasons between June 1991 and December 1993. Flowering occurs in the drier period of the year. Flowers commence opening at any time of the day, but open fully at the end of afternoon. The anthers dehisce and the stigmas are receptive as soon as the flowers are fully open. Stigmas remain receptive until 10:00 am the following day. Throughout this period, the pollen grains remain viable. The flowers have a complex morphology which favours allogamy. The species is also self-incompatible. Experimental pollinations, using compatible pollen grains, have shown that a flower which receives 60 compatible pollen grains has 20% probability of setting fruit; a flower which receives more than 400 pollen grains always sets fruit. However, only around 2% of naturally pollinated flowers receive more than 60 pollen grains. A stingless bee, Plebeia minima, is considered an effective pollinator of cupuassu. Another stingless bee, Trigonisca pediculana, also visits cupuassu flowers. Both bees are small insects, which are unlikely to fly very far. Ants (Wasmannia sp.) and weevils (Baris sp.) were considered secondary pollinators, unlikely to promote effective pollinationsFruits mature during the wet period of the year, approximately 5.5 months after the flowers open. The limited and irregular fruit set is probably caused by scarcity of pollinators. The transformation of cupuassu to a plantation crop will therefore require conditions which favour natural pollinators and their access to receptive and compatible flowers
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A study of some aspects of clonal selection and vegetative propagation of durian (Durio zibethinus Murr.) rootstocksMad, Hasan Bin January 1983 (has links)
No description available.
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The role of Zetzellia mali (Ewing)(Acarina:Stigmaeidae) and tydeid mites in biocontrol in apple orchardsGreatorex, Emma Clare January 1997 (has links)
No description available.
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