1887

oa Agrochemophysica - Chemiese ondersoek van die rooidoodprobleem by katoen in die westelike besproeiingsgebiede

Volume 1, Issue 3-4
  • ISSN : 0302-7112

 

Abstract

A research program was conducted on the Western irrigation areas of the Orange Free State Region in order to investigate the problem known as ""rooidood"" (redleaf disease) of cotton. Plant analyses indicated a potassium deficiency resulting in a potassium to magnesium, sodium and nitrogen imbalance in the cotton plant. Soil analyses indicated a statistical significant lower available potassium content in the soils on which ""rooidood"" occurred. A study of soil profiles pointed to temporary and\or permanent anaerobic root condition or poor root development. The latter conditions were invariably the result of a permanent or temporary water table and compact soil layers. Since the detrimental effects of poor soil physical conditions on potassium nutrition may partially be offset with high levels of potassium applications in the root zone, no definite conclusion was drawn as to which of the two factors, or both was responsible for the potassium deficiency in the plants.

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/content/agro/1/3-4/AJA03027112_16
1969-01-01
2020-09-18

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