The effect of long-term fertilizing and liming on soil pH and crop yields
1998
Travnik, K. | Petrasek, K. (Ustredni Kontrolni a Zkusebni Ustav Zemedelsky, Brno (Czech Republic)) | Vanek, V. | Nemecek, R.
Ca content in soil (Mehlich II), variations of soil pH values and crop yields were evaluated at five sites with long-term stationary plant nutrition trials. Four fertilization variants were evaluated: var. 1 unfertilized, var. 2 farmyard manure+liming, var. 3 farmyard manure, NPK+liming, var. 4 farmyard manure+NPK. A decrease in soil pH values and a reduction in Ca content in soil were recorded in variants without liming. Regular liming (var. 2 and 3) maintained soil pH values around 6, and higher Ca concentrations in soil. The yield on unfertilized plots over eight years in total was 31.4 to 39.9 cereal units per ha at the separate sites. Yields were increased by applications of farmyard manure and liming (var.2) against unfertilized variant by 1.6 to 15.4 % subject to the site, an average increase at all sites was 10.9 %. A yield increase on plots with farmyard manure and fertilizer applications (var.4) was 47.6 to 83.7 % against unfertilized variant, and 59.6 % on average for all sites. The variant with farmyard manure and fertilizer applications and liming (var.3) gave highest yields, an increase against unfertilized variant was 59.6 to 102.8 %, an average increase for all sites being 74.1 %. Yields were increased by 2.0 to 17.8 % by liming only (comparison of var.3 and 4), an average increase for all sites was 9.1 %.
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