Entity

Time filter

Source Type


Zhang J.,Pistachio Growers Assoc. Inc. of Australia
Acta Horticulturae | Year: 2011

A four-year study on application of reflective mulch (Extenday) in pistachio production showed that Extenday can increase yields and returns. Economic analysis showed that cost for mulch fitting is almost offset by increased returns in the first year. Assuming the mulch can be used for three years, it produces profit in the second and third years. The mulch increases temperature in the application area under direct sunlight in days with temperatures from 10° to 35°C. The mulch does not increase temperature in the night or during extremely cold and hot days. Light measurement shows that the mulch increases reflective light significantly. Source


Zhang J.,Pistachio Growers Assoc. Inc. of Australia
Acta Horticulturae | Year: 2014

'Mechanical slant topping' on 1-side of pistachio trees has been applied in Australia since 2007 and the effects of this style of mechanical pruning have been studied. The relationship between yield and flower bud numbers shows that onseason trees may have more than 3000 flower buds while off-season trees may have less than 200 flower buds. Investigations show that on-season trees on average have 15.7 nuts per rachis while off-season trees on average have 43.6 nuts per rachis. Trials showed that this style of mechanical pruning prior to an off-season resulted in significantly higher yields in the following off-season (2 years later) compared with trees that were mechanical pruned prior to an on-season. Flower bud change patterns were investigated for each side pruned in different winters. Investigations demonstrated positive correlation between flower bud formation and total cross sectional area of shoots cut 2 years previous. Five shoots cut with diameters ≥ 2.4 mm per tree seem to be a good indicator for flower bud formation of ≥ 200 flower buds per tree. Source


Zhang J.,Pistachio Growers Assoc. Inc. of Australia | Joyce C.,Pistachio Growers Assoc. Inc. of Australia
Acta Horticulturae | Year: 2011

Pistachio nut size is an important parameter for production. Some factors influencing on nut size such as variety, pollination, irrigation and crop load are known, however, different seasons still produce different size nuts. Effects from climate factors are considered. A study on influence of temperatures and winter chilling on nut size was carried out from 1998 to 2009. The results show that key period of maximum temperatures influencing the nut size was found in spring during hull enlargement from an r-contour map. Multiple regression study shows that maximum temperatures during hull enlargement and winter chill have significant influences on nut size. When maximum temperatures increase during hull enlargement, nut size increases. Under the same maximum temperature during that period, trees with good winter chill produce large nuts than poor chill years. Source

Discover hidden collaborations