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Seasonal uptake of phosphorus, potassium, calcium and magnesium by young peach trees
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: P. J.C. Stassen --- Department of Agronomy and Horticulture, Republic of South Africa J.D. Stadler --- , Republic of South AfricaTwo-year-old peach trees, grown in sand culture were destructively sampled over a period of 14 months, to determine the uptake of phosphorus, potassium, calcium and magnesium in the new growth (leaves, fruit and new shoots) and in the permanent structure... -
Effect of cyanamide and girdling on yield, fruit size and quality of De Wet peach
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: M. North --- , Republic of South Africa J.D. Stadler --- , Republic of South Africa Hannelie de Villiers --- , Republic of South AfricaTrees of an early-ripening peach cultivar, De Wet, were given a dormancy-breaking spray of hydrogen cyanamide and later girdled, in an attempt to improve fruit size and earliness. Girdling promoted a significant increase in fruit size, total soluble solids (TSS)... -
Tolerance of almond (Prunus amygdalus) and peach (P. Persica) seedlings to metam-sodium
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: A.F. Lourens --- , Republic of South Africa A.H. Lange --- ,The tolerance of 1-year-old almond seedlings (Prunus amygdalus) in a loamy sand, and newly planted peach seedlings (P. persica) in washed river sand to low concentrations of metam-sodium (sodium methyldithiocar- bamate) in the root zone was investigated. Phytotoxic symptoms were... -
Phytotoxicity of pre-emergence herbicides to peach seedlings (Prunus persica)
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: A.F. Lourens --- , Republic of South Africa A.H. Lange --- Extension Weed Scientist, United States of America F.J. Calitz --- , Republic of South AfricaPre-emergence herbicides were tested for relative phytotoxicity to Nemaguard peach seedlings (Prunus persica) in a sand culture. Typical symptoms, phytotoxicity ratings, growth and regrowth parameters were recorded. Diuron, the mixture diuron plus terbacil (1:1), terbutryne and norflurazon were rated phytotoxic... -
Effect of zinc carrier on mobilisation of foliar-applied zinc above and below the point of application in ‘Kakamas’ peach seedlings
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J. Wooldridge --- , Republic of South Africa C. Schutte --- , Republic of South AfricaIn a pot trial using coarse sand as a potting medium and modified (low zinc) Hoagland solution as a nutrient source, single mid-shoot leaves of mildly zinc deficient ‘Kakamas’ peach seedlings were periodically dipped into aqueous solutions, prepared at 20... -
Effect of foliar- and soil-applied boron in deciduous fruit orchards 2: apricot and peach
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J. Wooldridge --- , South AfricaBetween autumn 1996 and May 1998 a variety of boron (B) treatments were applied to mature apricot and peach trees in Western Cape orchards on soils containing 0.2 to 0.7 mg B kg−1. Leaf B levels in the B treatments... -
Water balance simulation of a peach orchard using the SWB model
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: N. du Sautoy --- Dept. of Soil Science, Faculty of Agriculture, Republic of South Africa N.Z. Jovanovic --- Dept. of Plant Production and Soil Science, Republic of South Africa J.G. Annandale --- Dept. of Plant Production and Soil Science, Republic of South AfricaSoil Water Balance (SWB) is a user-friendly irrigation scheduling model developed to estimate water use for a wide range of crops. The FAO crop factor option within this model allows one to determine daily irrigation requirements from daily weather data... -
Validation of the soil evaporation subroutine of the SWB-2D model in a hedgerow peach orchard
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: P Lobit --- Department of Plant Production and Soil Science, NS Mpandeli --- Department of Plant Production and Soil Science, JG Annandale --- Department of Plant Production and Soil Science, NZ Jovanovic --- Department of Earth Sciences, N du Sautoy --- Department Soil Science,The SWB (Soil Water Balance) model, previously developed to estimate water use by agronomic crops, has been adapted to describe solar radiation interception and soil evaporation in hedgerow orchards. The distribution of solar radiation (Rs) at the soil surface is... -
Effects of early season and autumn nitrogen applications on young ‘Keisie’ canning peach trees on a sandy, infertile soil
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J. Wooldridge --- , South AfricaThe effects of autumn (A) and early season (S) nitrogen (N) applications were investigated in a young ‘Keisie’ canning peach orchard on an infertile sandy soil in the Western Cape Province, South Africa. Over the first four consistent bearing seasons,... -
Effects of potassium and early-season nitrogen applications on young ‘Keisie’ canning peach trees on a sandy, infertile soil
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J. Wooldridge --- , South AfricaThe effects of different rates of potassium (K) and early season nitrogen (SN) were investigated in a ‘Keisie’ canning peach orchard on a sandy, infertile soil, at 1111 trees ha−1, in the Western Cape Province, South Africa. Over the first... -
Effect of extending the early season potassium supply on young ‘Keisie’ canning peach trees on a sandy, infertile soil
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J. Wooldridge --- , South AfricaA field trial was carried out to investigate the effects of applying potassium (K), either in two equal parts at full bloom (FB) and 42 days after FB (2-way split); or as a 4-way split, commencing at FB, with three... -
Evaluation of near infrared spectra for the prediction of post harvest quality in canning peaches
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: M. Manley --- Department of Food Science, South Africa E. Joubert --- Department of Food Science, South Africa L. Myburgh --- Department of Food Science, South Africa L. Lotz --- , South Africa M. Kidd --- , South AfricaHuge production losses occur because of deterioration of quality of clingstone peaches during cold storage, rendering the fruit unsuitable for canning. Near infrared (NIR) spectra recorded from intact clingstone peaches were evaluated to predict post harvest quality of these peaches...