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Yield Relationships of Barleys Grown in a Tropical Highland Environment

Woldeyesus Sinebo*

Holetta Agric. Res. Center, P.O. Box 2003, Addis Ababa, Ethiopia



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Fig. 1. Decadal rainfall and minimum, maximum, and mean air temperatures for Holetta Research Center in 1998 and 1999.

 


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Fig. 2. Path coefficients for grain yield, vegetative growth, and growth durations in 26 barley genotypes tested at four N and P levels in 1998 and 1999 at Holetta, Ethiopia. YLD, grain yield; STR, straw yield; SPK, spikes per square meter; VHT, vegetative shoot height; MHT, mature plant height; HED, vegetative duration; GFD, grain-filling duration. Note: VHT, GFD -> STR; SPK, HED -> YLD were not significant.

 


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Fig. 3. Path coefficients for grain yield, vegetative growth, and growth durations in 26 barley genotypes tested without N application at two P levels in 1998 and 1999 at Holetta, Ethiopia. YLD, grain yield; STR, straw yield; SPK, spikes per square meter; VHT, vegetative shoot height; MHT, mature plant height; HED, vegetative duration; GFD, grain-filling duration. Note: VHT, SPK -> GFD; VHT, GFD -> STR; VHT, GFD, MHT -> YLD were not significant.

 


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Fig. 4. Path coefficients for grain yield, vegetative growth, and growth durations in 26 barley genotypes tested with N application at two P levels in 1998 and 1999 at Holetta, Ethiopia. YLD, grain yield; STR, straw yield; SPK, spikes per square meter; VHT, vegetative shoot height; MHT, mature plant height; HED, vegetative duration; GFD, grain-filling duration. Note: SPK -> GFD; VHT, HED -> STR; SPK -> YLD were not significant.

 


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Fig. 5. Path coefficients for grain yield as affected by yield components, and for KW and KPS as affected by earlier formed traits in 26 barley genotypes tested at four N and P levels in 1998 and 1999 at Holetta, Ethiopia. YLD, grain yield; SPK, spikes per square meter; KPS, kernels per spike; KW, kernel weight; STR, straw yield; VHT, vegetative shoot height; MHT, mature plant height; HED, vegetative duration; GFD, grain-filling duration. Note: HED, GFD -> KPS were not significant.

 





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