用无中耕的方法种植玉米(Zea mays L.),正日益流行在许多州之中。因为这种方法在经济方面、生态方面和保持(土壤)方面都很有利。在弗吉尼亚,以一九七三年为例,共种玉米295,650公顷,其中71,547公顷(24.2％)是用无中耕法种植的;而1964年用无中耕法种植只有0.1％。其他几种作物也可以进行无中耕栽培,目前正在广泛采用。但是,研究得最多的是玉米对肥料的需要量。然而,进一步的阐明是必要的,特别是关于三种主要养分元素的准确需要量。 Growing corn (Zea mays L.) on a no-till basis is increasingly prevalent in many states. Because this method is economically, ecologically and sustainably (soil) are good. In Virginia, for example, in 1973, a total of 295,650 hectares of corn were planted, of which 71,547 hectares (24.2%) were planted with no-till cultivation; in 1964 only 0.1% were planted with no-till cultivation. Several other crops are also available for cultivation without tillage and are now widely used. However, the most studied is the fertilizer requirement of corn. However, further clarification is necessary, especially with regard to the exact requirements of the three main nutrient elements.