caa a22 4500 46320901X CHVBK 20180405153134.0 cr unu---uuuuu 170326e20070701xx s 000 0 eng 10.1007/s10705-006-9086-y doi (NATIONALLICENCE)springer-10.1007/s10705-006-9086-y Establishment of an agronomic database for Minjingu phosphate rock and examples of its potential use [Elektronische Daten] [C. Szilas, J. Semoka, O. Borggaard] A compilation of all presently available agronomic data on the Tanzanian Minjingu phosphate rock (MPR) has shown to be a valuable tool for evaluating the interactions between tropical soils and MPR or water-soluble P sources (WSP). The effect of a delayed dissolution of MPR products compared to WSP was clearly demonstrated by the slope of the regression curve relating the yield response to MPR with the yield response to WSP. In the first 2years, the average effectiveness of MPR is 74 and 94% of WSP respectively, whereas from the third year onwards the relative effectiveness is around 104%. From the analysis of the effect of soil properties on the yield response, it was found that low soil pH and low amounts of available P are the most favourable conditions for the effective use of MPR. However, beneficial effects were also indicated on less acidic soils if they are strongly P deficient. MPR application seems to have superior effect on soil properties such as pH, exchangeable Ca and Al compared with WSP. The effect of MPR application on available P and NaOH extractable P is significantly lower compared with WSP but the difference seems relatively small. An estimation of the distribution of the cultivated area of Tanzania into four suitability classes for direct application of MPR seems to be a useful tool in the process of selecting target areas where direct MPR application should be promoted. Springer Science+Business Media B.V., 2007 Phosphate rock nationallicence Minjingu nationallicence Agronomic database nationallicence Agronomic effectiveness nationallicence P fertilizer nationallicence Szilas C. Chemistry Department, The Royal Veterinary and Agricultural University, 40 Thorvaldsensvej, 1871, Frederiksberg C, Denmark aut Semoka J. Department of Soil Science, Sokoine University of Agriculture, P.O. Box 3008, Morogoro, Tanzania aut Borggaard O. Chemistry Department, The Royal Veterinary and Agricultural University, 40 Thorvaldsensvej, 1871, Frederiksberg C, Denmark aut Nutrient Cycling in Agroecosystems Kluwer Academic Publishers 78/3(2007-07-01), 225-237 1385-1314 78:3<225 2007 78 10705 https://doi.org/10.1007/s10705-006-9086-y text/html Onlinezugriff via DOI 1 review-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10705-006-9086-y text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Szilas C. Chemistry Department, The Royal Veterinary and Agricultural University, 40 Thorvaldsensvej, 1871, Frederiksberg C, Denmark aut NATIONALLICENCE 700 1- Semoka J. Department of Soil Science, Sokoine University of Agriculture, P.O. Box 3008, Morogoro, Tanzania aut NATIONALLICENCE 700 1- Borggaard O. Chemistry Department, The Royal Veterinary and Agricultural University, 40 Thorvaldsensvej, 1871, Frederiksberg C, Denmark aut NATIONALLICENCE 773 0- Nutrient Cycling in Agroecosystems Kluwer Academic Publishers 78/3(2007-07-01), 225-237 1385-1314 78:3<225 2007 78 10705 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer