BEMESTINGSRIGLYNE VIR DIE TAFELDRUIFBEDRYF

INHOUDSOPGAWE

1 INLEIDING ( Kobus Louw) _____________________________________________________ 10 2 NEEM VAN GROND- EN BLAARMONSTERS ( Pieter Raath) _ _____________________ 13 • GRONDMONSTERNEMING __________________________________________________ 13 – Monsterneming vir grondvoorbereiding _ __________________________________________ 13 – Bestaande wingerde _______________________________________________________ 14 – Klipperige grond _________________________________________________________ 14 – Hantering van die monsters _ _________________________________________________ 15 • BLAARMONSTERNEMING ___________________________________________________ 15 – Tyd van monsterneming _____________________________________________________ 15 – Blaarskyf of blaarsteel _ ____________________________________________________ 15 – Protokol vir monsterneming _ _________________________________________________ 16 3 INTERPRETASIE VAN GRONDANALISE VERSLAE VIR WINGERD ( Pieter Raath) ____ 19 • INLEIDING _ _____________________________________________________________ 19 • TEKSTUUR _ _____________________________________________________________ 19 • GRONDSUURHEID OF ALKALINITEIT (pH) _ _____________________________________ 20 • PLANTBESKIKBARE VOEDINGSELEMENTE ______________________________________ 20 • WEERSTAND _____________________________________________________________ 21 • FOSFOR ________________________________________________________________ 21 • KALIUM _ _______________________________________________________________ 23 • KALSIUM EN MAGNESIUM _ ________________________________________________ 24 • MIKRO-ELEMENTE (BOOR, MANGAAN, SINK, KOPER) _ ___________________________ 25 • BASIESE KATIOONVERSADIGINGSVERHOUDING (BCSR) EN DIE GENOEGSAAMHEIDSVLAK VAN BESKIKBARE VOEDINGSTOWWE (SLAN) – ’N VERGELYKING VAN DIE KONSEPTE ______ 27 4 CHEMIESE REGSTELLING VAN GRONDE TYDENS TYDENS GRONDVOORBEREIDING ( Dawid Saayman & Pieter Raath) _ ________________________________________________ 29 • NEGATIEWE GRONDEIENSKAPPE _ ___________________________________________ 29 • REGSTELLING VAN GRONDSUURHEID _________________________________________ 30 • BEKALKINGSTOWWE _ _____________________________________________________ 32 • TOEDIENING VAN KALK _ ___________________________________________________ 33 • GIPSTOEDIENINGS _ ______________________________________________________ 33 • REGSTELLING VAN FOSFAATINHOUD __________________________________________ 34 • OPSOMMING _ ___________________________________________________________ 35 5 ONDERHOUDSBEMESTING ( Pieter Raath, Kobus Conradie & Dawid Saayman ) _ __________37 • INLEIDING _ _____________________________________________________________ 37 • VOEDINGSELEMENTE WAT DEUR WINGERD BENODIG WORD _ _____________________ 38 – Hoeveelhede elemente wat jaarliks opgeneem word _ __________________________________ 38 – Verspreiding van elemente tussen verskillende organe _ ________________________________ 38 – Seisoenale element-opname-patrone _____________________________________________ 39 • MAKRO-ELEMENTE _ ______________________________________________________ 40 – Stikstof (N) _ ___________________________________________________________ 40 – BEMESTINGSPROGRAM VIR STIKSTOF ________________________________________ 43 – Bemestingstye ________________________________________________________ 43

8 | INHOUDSOPGAWE