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Publication Date
1977
Description
Results are reported of field experiments aimed at determining the optimal content of available P and K in soils under grassland with the view of dimensioning fertilizer applications more precisely. The P2O5 and K2O levels in the soil are understood to be optimal if the P and K fertilizers applied (with NK and NP basal fertilization, respectively) help to produce maximum forage yields with significant yield increment, and adequate P and K levels in the plants to guarantee normal plant growth. The experiments were arranged according to the split-plot design. The effectiveness of different levels of phosphorus and potassium fertilizers was investigated over several years. The soils under study differed in their accumulation of plant-available forms of P and K. It is recommended to dimension fertilizer levels according to the P2O5 and K2O status of the soil.
Citation
Melnichuk, Vadim; Fedorova, Lyudmila; Panferov, Nikolai; and Pachkovskaya, Valentina, "The determination of the optimal content of mobile phosphorus and potassium in soils for grassland swards" (1977). IGC Proceedings (1977-2023). 47.
(URL: https://uknowledge.uky.edu/igc/1977/sess7/47)
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The determination of the optimal content of mobile phosphorus and potassium in soils for grassland swards
Results are reported of field experiments aimed at determining the optimal content of available P and K in soils under grassland with the view of dimensioning fertilizer applications more precisely. The P2O5 and K2O levels in the soil are understood to be optimal if the P and K fertilizers applied (with NK and NP basal fertilization, respectively) help to produce maximum forage yields with significant yield increment, and adequate P and K levels in the plants to guarantee normal plant growth. The experiments were arranged according to the split-plot design. The effectiveness of different levels of phosphorus and potassium fertilizers was investigated over several years. The soils under study differed in their accumulation of plant-available forms of P and K. It is recommended to dimension fertilizer levels according to the P2O5 and K2O status of the soil.
