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建立人际资源圈Coping_With_Drought
2013-11-13 来源: 类别: 更多范文
Coping With Drought
Coping With Drought
Being a farmer in drought conditions can be very hard at times. Farmers cannot predict a drought or even stop a drought. Drought causes crop failure, limited use of water, wind erosion, and many other problems. However, there are some ways a farmer can get by these conditions if he or she uses their agricultural experiences.
Moisture is the single most limiting factor to crop yields. Tillage techniques conserve moisture to increasing crop yields and limits the consequences of drought. Tillage has been the traditional way to prepare seedbeds and control weeds (Sirios 1). To conserve moisture, the kind of tillage and the number of tillage operations affects the amount of moisture remaining following tillage and the ability of the soil surface to attract and store additional moisture (Sirios 1). The greatest moisture loss is usually experienced during the first field trip. However, additional trips result in more extensive drying in that field. Moisture loss from tillage is especially important during dry springs, when the seedbed may dry out and result in poor germination if rainfall does not rewet the seed. Spring tillage should be shallow to limit moisture loss
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