Articles by Keyword: Phosphate Fertilizers

Search results for Phosphate Fertilizers

We found 25 results for you
  1. The effectiveness of Langebaan rock phosphate and superphosphate in two acid, phosphate-deficient soils

    The effectiveness of Langebaan rock phosphate and superphosphate in two acid, phosphate-deficient soils

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Acid, P-deficient soils with a large capacity to immobilize P favour the rapid decomposition of apatite. Such soils are widespread in the east of South Africa and the possibility exists that Langebaan rock phosphate (Langfos) may be a more cost-effective...
  2. Response of maize to ammonium nitrate, urea and cogranulated urea-urea phosphate

    Response of maize to ammonium nitrate, urea and cogranulated urea-urea phosphate

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Urea fertilizers may lose N by ammonia volatilization when applied in the field. In order to reduce this loss, modified urea compounds are being used. Not all of them reduce ammonia loss and improve crop yields. A field study was...
  3. Ammonia volatilization from ammonium nitrate, urea and urea phosphate fertilizers applied to alkaline soils

    Ammonia volatilization from ammonium nitrate, urea and urea phosphate fertilizers applied to alkaline soils

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    The volatilization of ammonia following applications of urea fertilizers to soils may release significant amounts of N into the atmosphere and reduce the plant available N. This study compared ammonia loss from urea phosphate (170 g N kg−1, 190 g...
  4. The Effects of Phosphate Fertilizers and Manure on Maize Yields in South Western Kenya

    The Effects of Phosphate Fertilizers and Manure on Maize Yields in South Western Kenya

    Item type: Journal Article • Journal: East African Agricultural and Forestry Journal
    Phosphorus, nitrogen and Striga hermonthica are the major constraints to maize production in the Nyanza Province of Kenya. Field trials were conducted on-farm in Nyanza Province to investigate the effects of phosphate fertilizers and manure on maize yields. The experimental...
  5. Factors Affecting Soil Phosphate Distribution and Reactions in Cape Forest Soils

    Item type: Journal Article • Journal: South African Forestry Journal
    The amounts of various forms of phosphate in some Cape soils and the adsorption of phosphate by these soils were investigated. The levels were low and only 2% was in available form. The major fraction of phosphate in the soil...
  6. Long term nitrogen and phosphorus application to veld

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    The long term effects of a 5N x 3P factorial fertilizer application trial on hay yields, botanical composition and soil properties of veld are presented. Significant increases in hay yields were recorded during most years. There was a strong correlation...
  7. Fertilization of southern tall grassveld of natal: Effects on botanical composition and utilization under grazing

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    The long‐term effects of nitrogen, phosphate and lime on change in botanical composition and utilization under grazing of Southern Tall Grassveld of Natal are presented. Nitrogen, phosphate, lime and type of nitrogen affected botanical composition significantly. Generally, fertilization had the...
  8. Nutrition of intensive pastures in the summer rainfall areas of southern Africa

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    Consideration is given to the current state of knowledge regarding the nutrition of cultivated pastures in the summer rainfall areas of southern Africa. Research efforts over the years have concentrated on the nitrogen (N) requirements of pastures, with relatively little...
  9. Habitat preferences of twenty‐three grass species in the Bankenveld

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    Some grass species occur more frequently in certain habitats than in others. There is, however, uncertainty as to exactly which factors are responsible for this phenomenon. Species composition as well as habitat data were collected from plots situated on the...
  10. A proposed mechanism for the volatilization of ammonia from fertilized neutral to alkaline soils

    A proposed mechanism for the volatilization of ammonia from fertilized neutral to alkaline soils

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Ammonia volatilization from five soils, ranging in clay content from 7,6 to 49,9%, were determined after pH values of the soils were adjusted to 8,0. Ammonium sulphate, limestone ammonium nitrate, urea, monoammonium phosphate and diammonium phosphate were applied on the...