Non-Destructive Sampling for Yield Estimation.

Li Jian; Ford-Robertson; J B Wattres; M P

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Volume 12 Issue 4

May 2019

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Article Navigation > Journal of Zhejiang A&F University > 1995 > 12(4): 353-359

Li Jian, Ford-Robertson, J B Wattres, M P. Non-Destructive Sampling for Yield Estimation.[J]. Journal of Zhejiang A&F University, 1995, 12(4): 353-359.

Citation:

Li Jian, Ford-Robertson, J B Wattres, M P. Non-Destructive Sampling for Yield Estimation.[J]. Journal of Zhejiang A&F University, 1995, 12(4): 353-359.

Non-Destructive Sampling for Yield Estimation.

1.
Zhejiang Forestry College, Lin’an 311300, PRC

Received Date: 1995-06-01
Publish Date: 1995-12-30

Abstract

A general model was sought to estimate the shoot biomass of short rotation coppice crops in the UK. Different aged shoots of willow and poplar clones were sampled from different sites to produce 19 data sets. Models were created for each clone, separately for 1-, 2- and 4-year old willow, and general models for 1 to 4 year willows, and 3 year old poplars. The models were compared with regard to accuracy and correlation coeffieient. The diameter at breast height was chosen as the best independent variable to estimate the shoot weight. A general multiplicative model without intercept was created for all the willows and poplars sampled. The model was evaluated and was found to have average accuracy of 92% when tested with new data from 1- and 3-year old willow clones. The model requires further validation.
- Salix,
- Populus,
- biomass,
- mathematical models,
- harvesting

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Non-Destructive Sampling for Yield Estimation.

1. Zhejiang Forestry College, Lin’an 311300, PRC

Received Date: 1995-06-01
Publish Date: 1995-12-30

Key words:

Abstract: A general model was sought to estimate the shoot biomass of short rotation coppice crops in the UK. Different aged shoots of willow and poplar clones were sampled from different sites to produce 19 data sets. Models were created for each clone, separately for 1-, 2- and 4-year old willow, and general models for 1 to 4 year willows, and 3 year old poplars. The models were compared with regard to accuracy and correlation coeffieient. The diameter at breast height was chosen as the best independent variable to estimate the shoot weight. A general multiplicative model without intercept was created for all the willows and poplars sampled. The model was evaluated and was found to have average accuracy of 92% when tested with new data from 1- and 3-year old willow clones. The model requires further validation.

Li Jian, Ford-Robertson, J B Wattres, M P. Non-Destructive Sampling for Yield Estimation.[J]. Journal of Zhejiang A&F University, 1995, 12(4): 353-359.

Citation:

Li Jian, Ford-Robertson, J B Wattres, M P. Non-Destructive Sampling for Yield Estimation.[J]. Journal of Zhejiang A&F University, 1995, 12(4): 353-359.

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