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- W1973016985 abstract "In fibre hemp (Cannabis sativa L.) a high plant density is desirable, but inter-plant competition may cause self-thinning, which reduces stem yield and quality. We investigated whether agronomic factors could reduce self-thinning in hemp. The effects of soil nitrogen level (80 and 200 kg ha−1), row width (12.5, 25 and 50 cm), type of sowing implement, and thinning method on self-thinning, growth, yield and quality of hemp were determined in field experiments in 1991 and 1992. Soil nitrogen level affected plant morphology before self-thinning occurred. Due to enhanced competition for light more plants died from self-thinning at 200 than at 80 kg N ha−1. In August, stem yield of living plants was similar at the two nitrogen levels, but 5% of the plants had died at 80 kg N ha−1 and 25% at 200 kg N ha−1. Although dry matter losses resulting from self-thinning were greater at 200 than at 80 kg N ha−1, crop growth rate was greater at 200 than at 80 kg N ha−1. Apparently, the crop growth at 80 kg N ha−1 was affected by a lack of nitrogen. At final harvest in September stem yield of living plants was 10.4 t ha−1 at 80 and 11.3 t ha−1 at 200 kg N ha−1, bark content in the stem was 35.6% at 80 and 34.0% at 200 kg N ha−1. The effect of row width on self-thinning was small relative to that of nitrogen level. More self-thinning took place at 50 cm row width than at 12.5 and 25 cm. During early growth and also in August stem yield was smaller when row width was larger; in September row width did not affect stem yield or quality. Type of sowing implement and thinning method did not affect self-thinning or stem yield." @default.
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- W1973016985 date "1995-07-01" @default.
- W1973016985 modified "2023-09-24" @default.
- W1973016985 title "Nitrogen fertilization and row width affect self-thinning and productivity of fibre hemp (Cannabis sativa L.)" @default.
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- W1973016985 doi "https://doi.org/10.1016/0378-4290(95)00017-k" @default.
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