The results show that the daily rainfall insurance rate effectively guides the choice of the alfalfa harvesttimes.
结果表明：逐日降水量保证率对指导苜蓿收获期的选择是行之有效的；
2
The yield and harvesttimes can be decided by regrowth ability of variety, sowing date and environmental conditions.
豌豆苗的采收次数和产量不仅与品种再生能力有关，和播种方式与生长条件也有密切的关系。
3
The hay production and nutrition of rye in different development stage, and the effect of harvesttimes and date on the hay yield and quality had been studied.