This means, marginal lands will have to be considered. Plants breeders will have to develop cultivars that are adapted to specific environmental stresses. It is estimated that abiotic environmental stresses are responsible for about 70% of yield reduction of crops in production.
In modern agricultural production, producers (espe- cially those in developed countries) are able to alleviate moisture stress by providing supplemental irrigation. Also, fertilizers are used to alleviate nutritional stress, while soil reaction (pH) can be modified by applying soil amendments such as lime or sulfur. Excessive soil moisture can be removed by installing drainage systems. However, in poor regions of the world where such