A possibility to regulate an optimal P level at different soils and P available content
1998
Nejova-Bocheva, E. | Dimitrova, F. | Donov, D. | Toncheva, R. (Institut po Pochvoznanie i Agroekologiya "N. Pushkarov", Sofia (Bulgaria))
The results of these investigations substantiate the following conclusions: 1. The method of sorption isotherms of non-disturbed microstructure of soil and optimal moisture could be used for various soils with satisfactory approximation to regulate desirable P levels. 2. Application of differentiated fertilizer rates at a standard equilibrium P concentration reduces to a considerable extent the differences in yield between the soils. 3. The phosphate level corresponding to equilibrium P concentration of 0.3 mg/l in 0.01 M CaCl2 producing maximal yield with the highest uptake of a great number of nutrient elements could be assepted as optimal.
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Эту запись предоставил Institute of Agricultural Economics