The Experts below are selected from a list of 23052 Experts worldwide ranked by ideXlab platform
Louie J Kasuga - One of the best experts on this subject based on the ideXlab platform.
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variation in cashew Tree Yields in south east tanzania and the implication for management of cashew smallholdings
Tropical Agriculture, 1995Co-Authors: Peter J Martin, Louie J KasugaAbstract:In 2-ha plots of mature cashew (Anacardium occidentale L.) Trees in farmers' fields, cashew production showed large variations in relation to local Tree density and canopy ground cover ratio (CGCR). Maximum cashew production usually occurred between Tree densities equivalent to 40-80 Trees ha -1 but at one site where Trees were small it occurred at 120 Trees ha -1 . Below a CGCR of 0.4, cashew production was low and was usually at a maximum between 0.5 and 0.6. Individual Tree Yields were highly variable and were poorly correlated with density, canopy ground cover area, trunk cross section area, and Yields of surrounding Trees. In both on-farm and on-station blocks of Trees, individual Tree Yields were highly correlated with their Yields in previous years showing that, at the same site, Tree Yields relative to each other were consistent from year to year. All on-farm sites contained an appreciable proportion of very low-yielding Trees. The productivity of smallholder cashew farms may be improved by a combination of selective thinning of poor yielding Trees and planting available spaces with improved material.
Richard Lamboll - One of the best experts on this subject based on the ideXlab platform.
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cashew nut production in tanzania constraints and progress through integrated crop management
Crop Protection, 1997Co-Authors: P J Martin, C P Topper, R A Bashiru, F Boma, D De Waal, Hugh C Harries, L J Kasuga, N Katanila, L P Kikoka, Richard LambollAbstract:Cashew (Anacardium occidentale L.) is the fourth most valuable Tanzanian export crop after coffee, cotton and tea. Following a steady increase in production from the middle of this century, there was a dramatic decline from 145,000 t in 1973 to 16,500 t in 1986. This was caused by a complex of socio-economic (low producer prices, inefficient marketing, villagisation) and biological factors (cashew powdery mildew disease, low Tree Yields, overcrowding of Trees). Recently, higher cashew prices and liberalised marketing have created favourable conditions that have encouraged farmers to tackle several of the biological constraints on production. As a result, cashew production has risen steadily from 16,500 t in 1986 to 70,320 t in 1994.
Peter J Martin - One of the best experts on this subject based on the ideXlab platform.
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variation in cashew Tree Yields in south east tanzania and the implication for management of cashew smallholdings
Tropical Agriculture, 1995Co-Authors: Peter J Martin, Louie J KasugaAbstract:In 2-ha plots of mature cashew (Anacardium occidentale L.) Trees in farmers' fields, cashew production showed large variations in relation to local Tree density and canopy ground cover ratio (CGCR). Maximum cashew production usually occurred between Tree densities equivalent to 40-80 Trees ha -1 but at one site where Trees were small it occurred at 120 Trees ha -1 . Below a CGCR of 0.4, cashew production was low and was usually at a maximum between 0.5 and 0.6. Individual Tree Yields were highly variable and were poorly correlated with density, canopy ground cover area, trunk cross section area, and Yields of surrounding Trees. In both on-farm and on-station blocks of Trees, individual Tree Yields were highly correlated with their Yields in previous years showing that, at the same site, Tree Yields relative to each other were consistent from year to year. All on-farm sites contained an appreciable proportion of very low-yielding Trees. The productivity of smallholder cashew farms may be improved by a combination of selective thinning of poor yielding Trees and planting available spaces with improved material.
P J Martin - One of the best experts on this subject based on the ideXlab platform.
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cashew nut production in tanzania constraints and progress through integrated crop management
Crop Protection, 1997Co-Authors: P J Martin, C P Topper, R A Bashiru, F Boma, D De Waal, Hugh C Harries, L J Kasuga, N Katanila, L P Kikoka, Richard LambollAbstract:Cashew (Anacardium occidentale L.) is the fourth most valuable Tanzanian export crop after coffee, cotton and tea. Following a steady increase in production from the middle of this century, there was a dramatic decline from 145,000 t in 1973 to 16,500 t in 1986. This was caused by a complex of socio-economic (low producer prices, inefficient marketing, villagisation) and biological factors (cashew powdery mildew disease, low Tree Yields, overcrowding of Trees). Recently, higher cashew prices and liberalised marketing have created favourable conditions that have encouraged farmers to tackle several of the biological constraints on production. As a result, cashew production has risen steadily from 16,500 t in 1986 to 70,320 t in 1994.
Michael Blanke - One of the best experts on this subject based on the ideXlab platform.
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quantifying key parameters as elicitors for alternate fruit bearing in cv elstar apple Trees
Plant Science, 2013Co-Authors: Annelena Krasniqi, Lutz Damerow, Achim Kunz, Michael BlankeAbstract:The commonly known alternate bearing, i.e. year-to-year change of large and small Yields of fruit Tree crops worldwide, is often induced by abiotic stress such as late frost, which will eliminate flowers or fruitlets. This study presents an alternative form, biotic biennial bearing, i.e. change of large and small Yields of the same Trees within the same Tree row in the same year. Three methods were developed or modified for the analysis of the number of flower clusters and yield of 2086 apple (Malus domestica Borkh.) cv. 'Elstar' Trees. The first method, i.e., based on intersect between yield in year x and year x+1 and flower clusters in year x, yielded 91-106 flower clusters, whereas the second method, i.e., mean yield in year x and year x+1, resulted in a range of 72-133 flower clusters, or 9.6kg/Tree necessary for sustainable cultivation of apple cv. 'Elstar'. The third 'biennial bearing index' (BBI), was calculated in three ways as the ratio of differences in Tree Yields to cumulative Tree yield, for individual Trees (rather than orchard average) to demonstrate the Tree-to-Tree alternation. A scheme for the possible underlying regulatory mechanisms was developed, which includes potential elicitors such as light deprivation and subsequent lack of flower initiation, are discussed as a possible result of polar basipetal GA7 transport, cytokinin level in the xylem and phloem and down-regulation of the gene expression of the flowering gene. Suggested countermeasures included early chemical or mechanical thinning.
