Five genotypes of Short Rotation Coppice (SRC) willow: ‘Beagle’ ((S. viminalis ‘L810203’ x viminalis ‘L81102’) x ‘Astrid’ x male parent unknown), ‘Olof’ (S. viminalis ‘Bowles Hybrid’) x ((S. schwerinii ‘L79069’) x ((S. viminalis ‘L78195’ x viminalis ‘L78101’) ‘Orm’) ‘Bjorn’). ‘Ashton Stott’ (S.viminalis ‘Bowles Hybrid’) x S.dasyclados ‘Korso’, ‘Tora’ (S. schwerinii ‘L79069’) x ((S. viminalis ‘L78195’ x viminalis ‘L78101’) ‘Orm’), and ‘Torhild’ ((S. schwerinii ‘79,069’) x ((S. viminalis) x S. viminalis ‘L78195’ x viminalis ‘L78101’)) ‘Orm’) ‘Tora’) x ((S.viminalis ‘L78195’ x viminalis ‘L78101’) ‘Orm’) were grown in large mono-plots or within plots of intimate mixtures. Over a seven year period half of the plots were harvested on a two-year harvest cycle (three harvests) and the rest on a three-year harvest cycle (two harvests). At the end of this 7 year trial period there were no significant differences between total dry weights or stool survival, irrespective of harvest interval. With the realisation of the importance of this finding for more regular crop management practices, the experiment was continued for a further six years allowing for a further round of two and three year harvests. Results suggest that there ultimately are yield penalties, although these may be minimised by careful and appropriate clonal selection.

Short Rotation Coppice (SRC) 柳树的五种基因型：'Beagle'（（S. viminalis 'L810203' x viminalis 'L81102'）x 'Astrid' x 父本未知），'Olof'（S. viminalis 'Bowles Hybrid'） x (( S. schwerinii 'L79069') x (( S. viminalis 'L78195' x viminalis 'L78101') 'Orm') 'Bjorn')。'Ashton Stott' (S.viminalis 'Bowles Hybrid') x S.dasyclados 'Korso', 'Tora' ( S. schwerinii 'L79069') x (( S. viminalis 'L78195' x viminalis 'L 7 8101' ) Orm') 和 'Torhild' (( S. schwerinii '79,069') x (( S. viminalis )x S. viminalis'L78195' x viminalis 'L78101')) 'Orm') 'Tora') x ((S.viminalis 'L78195' x viminalis 'L78101') 'Orm') 生长在大的单块地或紧密混合物的地块中. 在七年期间，一半的地块在两年收获周期（三次收获）中收获，其余的在三年收获周期（两次收获）中收获。在这 7 年的试验期结束时，总干重或粪便存活率之间没有显着差异，无论收获间隔如何。意识到这一发现对更规律的作物管理实践的重要性后，该实验又继续进行了六年，以进行第二轮和三年的收获。结果表明最终会产生产量损失，尽管通过仔细和适当的克隆选择可以将这些损失降至最低。