The Response of Eucalyptus to Fertilizer Application at Planting: The Louw's Creek Trial

Donald, D. G.M.; Schutz, C. J.

doi:10.1080/00382167.1977.9629784

Cited by 9 publications

(6 citation statements)

References 2 publications

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“…One of the earlier trials, established in Mpumalanga at Louw's Creek, also showed a dissipation of earlier responses to fertilizer additions by the age of clearfelling (Donald and Schutz, 1977). These authors ascribe this dissipation in the response to internal competition withinthe plots.…”

Section: Discussionmentioning

confidence: 89%

“…Other researchers have blamed the lack of continuance in the response to poor experimental design, high stocking, poor weed control and mixing the P into the soil a week before planting, and low application rates (Schonau, 1983). Despite the dissipation of the response, Donald and Schutz (1977) stress that there are still benefits to be gained from the fertilizing of eucalypts at planting. These benefits include earlier canopy closure and possibly a more uniform stand.…”

Section: Discussionmentioning

confidence: 95%

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Responses of Eucalyptus species to fertilizer applications made at planting on granitic parent materials in the Mpumalanga and Northern Provinces of South Africa

Carlson¹,

Allan²,

Soko³

2001

The Southern African Forestry Journal

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SYNOPSISEarly research trials in South Africa have shown that Eucalyptus species generally respond positively to the addition of nutrients at planting. However, as most of these research trials were located in KwaZuluNatal, it was important to investigate the nature of the response in other afforested regions of the country where this genus is planted. Consequently, a number offertilizer trials were established in the late 1980's and early 90's in Mpumalanga and the Northern Province to investigate the nature offertilizer responses in Eucalyptus species. Three of these trials form a series and were established to investigate the impact of nitrogen (N), phosphorus (P) and potassium (K) additions made both individually and in combination. In addition, two trials in Mpumalanga were initiated to investigate genotype by fertilizer interactions. Viewed as a whole, the results indicate that growth improvements in response to the nutrient additions are readily obtainable. Highly significant positive responses to Nand P, each applied individually, occurred immediately after planting. The response to N appeared more sustained than the response to P. The best growth was observed when Nand P were applied together. The ratio ofN to P that gave the best response ranged from 3:1 to 3:2. No genotype by fertilizer interactions were observed in the trials investigating this aspect.

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Section: Discussionmentioning

confidence: 89%

Section: Discussionmentioning

confidence: 95%

Responses of Eucalyptus species to fertilizer applications made at planting on granitic parent materials in the Mpumalanga and Northern Provinces of South Africa

Carlson¹,

Allan²,

Soko³

2001

The Southern African Forestry Journal

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“…This improvement can last to the end of the rotation in the case of short rotation crops such as eucalypt and wattle (Schonau, 1977(Schonau, & 1971, but may not do so, depending upon other limiting factors (Donald & Schutz, 1976).…”

Section: Fertilizer Applicationmentioning

confidence: 98%

Silvicultural Practices Influencing Harvesting

Donald

1977

South African Forestry Journal

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The significance of sivlicultural practice in relation to the harvesting of tree crops is briefly considered. It is concluded that the silviculturist can affect harvesting procedures and costs, both negatively and positively, but that in the light of modern knowledge negative aspects should no longer occur. Combined early planning to obtain maximum benefits for both silviculturist and harvesting forester are considered essential. OPSOMMINGDie uitwerkmg van boskultuurpraktyk op die ontginning van boomoeste word kortliks bespreek. Die gevolgtrekking word gemaak dat die boskultuurkundige die ontginningsmetodes en kostes positief sowel as negatief kan affekteer. Met behulp van huidige kennis behoort negatiewe invloede nie meer voor te kom nie. Gekombineerde beplanning op 'n vroee stadium deur die boskultuurkundige en ontginningsbosbouer word as noodsaaklik beskou om die doeltreffendste stelsels tnr albei te bereik.

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“…In a series of E. grandis spacing trials within the temperate region of South Africa, increases of between 2 and 7 m 3 ha -1 year -1 were obtained close to culmination age by planting at 1 667 stems ha -1 compared to the suboptimal 1 111 stems ha -1 (Smith et al 2005b). Fertilisation of E. grandis at planting has been shown to improve stand uniformity (Donald and Schutz 1977), but early growth responses do not always remain at rotation age. In a review of 81 fertiliser-related trials across South Africa, Germishuizen and Smith (2007) found that trials showing no early growth response were often not measured through to rotation age.…”

Section: Eucalyptus Grandis •mentioning

confidence: 99%

The influence of tree improvement and cultural practices on the productivity ofEucalyptusplantations in temperate South Africa

Boreham¹,

Pallett²

2009

Southern Forests: a Journal of Forest Science

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The Response of Eucalyptus to Fertilizer Application at Planting: The Louw's Creek Trial

Cited by 9 publications

References 2 publications

Responses of Eucalyptus species to fertilizer applications made at planting on granitic parent materials in the Mpumalanga and Northern Provinces of South Africa

Responses of Eucalyptus species to fertilizer applications made at planting on granitic parent materials in the Mpumalanga and Northern Provinces of South Africa

Silvicultural Practices Influencing Harvesting

The influence of tree improvement and cultural practices on the productivity ofEucalyptusplantations in temperate South Africa

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