This invention describes a new method of grain production wherein designated male plant pollen may be selected at anytime before pollination of a designated female plant. In the method, a designated female plant having both female and male components is grown. Furthermore, designated male pollen is selected for use in cross-pollinating the designated female plant. Cross-pollination may occur on one more days, is intentional, and occurs at a time when male components are not shedding pollen. The criteria used for selecting designated male pollen may include, but is not limited to, market information and commodity price information. Moreover, the designated male plant pollen may have a different maturity period compared to the designated female, selection may occur after the female has germinated, and/or result in a higher harvested crop value than other available pollen. Accordingly, the process involves the intentional delivery of designated male plant pollen at will, as available either in a preserved pollen bank or real-time collection from male plants as they become available, in a growth chamber for example. The delivered designated male plant pollen is in such amounts and fortuitously timed that it preferentially cross-pollinates the designated female plant. The invention also permits real-time agronomic decision making to influence grain content and constituents to maximize grain value.L'invention concerne un nouveau procédé qui permet de générer une semence hybride dans une plante cultivée quelconque tout en réduisant également la contamination provenant de croisements extérieurs et d'auto-pollinisation. Contrairement à des procédés de production de semences classiques, le procédé de l'invention ne dépend pas de l'utilisation d'une forme quelconque de stérilité mâle chez les plantes parents femelles, ni de l'utilisation de distances d'isolement de plantes indésirables et non apparentées de la même espèce, ni de l'utilisation de plantes parents mâles à proximi
