sterile leafとは 意味・読み方・使い方

To grow root or leaf soundly, to keep a deep green color of leaf at the time of harvesting, to enhance the resistance to diseases at the time of cultivating, to prevent the soil from becoming sterile, and to reduce the content of nitrate-nitrogen in the harvest, without giving a compound fertilizer or an organic fertilizer excessively in growing agricultural products.例文帳に追加

農作物の栽培に於いて化成肥料や有機質肥料を過剰に与えずに、根や葉が健全に生育し、収穫時の葉の色が濃い緑色を保持し、栽培時の病気に対する抵抗力を高め、また土壌が痩せず、収穫物の硝酸態窒素の含有量を減少させること。 - 特許庁