Tomato response to long‐term potassium and lime application on a sandy ultisol high in non‐exchangeable potassium
| Autor: | W. C. Liebhardt, H. W. Martin |
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| Rok vydání: | 1994 |
| Předmět: | |
| Zdroj: | Journal of Plant Nutrition. 17:1751-1768 |
| ISSN: | 1532-4087 0190-4167 |
| DOI: | 10.1080/01904169409364844 |
| Popis: | In a ten‐year study of potassium (K) and lime application to a Kalmia sandy loam (fine‐loamy, siliceous, thermic Typic Hapludult), a soil high in nonexchangeable K, corn (Zea mays L.) and soybean [Glycine max (L.) Herr.] have not responded to applied K. The objectives of this study were to determine if a high K‐requiring crop such as tomato (Lycocersicon esculentum Mill. cv. Redpak) would respond to KCl fertilizer rate or lime type (dolomitic, calcitic, and mixed) and rate on such a soil. Potassium was applied at 0, 56, and 112 kg K/ha every year for ten years. Lime was applied at 0, 2, and 9 Mg/ha in calcitic, mixed, and dolomitic forms twice in ten years (1970 and 1973). In 1980, the tenth year of the study, tomato fruit was harvested by hand once‐over to simulate machine harvest and divided into four maturity groups by color. Soil pH was higher with dolomitic than calcitic lime. Soil K saturation was not influenced by lime rate or type. Fruit yield and leaf phosphorus (P), calcium (Ca), and ma... |
| Databáze: | OpenAIRE |
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