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- W2000332322 abstract "Abstract The ability of tillage systems to maintain sufficient medic (Medicago spp.) seed reserves (200 kg ha−1) in the topsoil (0–50 mm) without decreasing the yields of the successive wheat crop is one of the major factors determining the success of medics in ley farming systems with wheat (Triticum aestivum L.). The effect of six methods of tillage commonly used in medic and cereal farming in the southern Cape, i.e., fieldspan (light spring-tooth cultivator; 50 mm), shallow scarifier (50 mm), deep scarifier (150 mm), shallow disc plough (50 mm), deep disc plough (150–200 mm) and mouldboard plough (250 mm), on the distribution of the medic seed reserves in the soil profile and yields of successive wheat crops were investigated. Results revealed that tine implements, regardless of the depth of cultivation, maintained more seed in the topsoil, compared to the shallow-disc, deep- disc and mouldboard ploughing. Seed reserves in the topsoil correlated with the regeneration and growth of the following medic pastures. In 1990 wheat yields did not differ significantly between tillage treatments and an average yield of 1.5 t ha−1 was obtained. In 1992 the highest wheat yields were obtained with deep scarifier and to a lesser extent disc and mouldboard ploughing. This study illustrated that although shallow tine cultivations favour the regeneration of medics, deeper tine cultivations (obtained with the deep scarifier treatment) may be needed to ensure high wheat yields." @default.
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- W2000332322 date "1998-01-01" @default.
- W2000332322 modified "2023-09-27" @default.
- W2000332322 title "The influence of soil tillage on the distribution of medic seeds in the soil, regeneration of medics and wheat yields in a medic wheat rotation" @default.
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- W2000332322 doi "https://doi.org/10.1016/s0378-4290(97)00077-4" @default.
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