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在过去的 5年里 ,在密西西比州的斯通维尔地区的植物生理学家 Bill Pettigrew博士于 4月 1日播种 ,试点的平均产量较 5月 1日播种的高 1 0 % ,最好的产量每公顷在 1 2 2 4 .6～ 1 360 .6公斤。种植特早熟品种 ,获得一个适宜的密度是很关键的 ,种子必须优质、气候要适宜 ,而且要
Plant Physiologist Dr. Bill Pettigrew of Sittville, Mississippi, has been sowing on April 1 for the past five years. The average yield of the pilot was 10% higher than that sown on May 1. The best yield per Hectare in 1 2 2 4 .6 ~ 1 360 .6 kg. It is crucial to grow extra-precocious varieties to obtain a suitable density, the seeds must be of good quality, the climate should be suitable, and