The development trend of the researches on the water-fertilizer effect on dry land farmland in light of the characteristics of agro-ecosystem was also prospected.
结合农业生态系统特点对未来旱地农业水、肥效应的研究方向进行了展望。
What's more, Navajo land was rugged and dry, making it less desirable as farmland for white settlers;
此外，凹凸不平的地形以及干燥的土壤使得该地区不适宜耕种，因此对白人定居者没有吸引力；
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