Abstak. Kekeringan terjadi akibat dari distribusi hujan yang tidak merata. menyebabkan kerugian baik dalam bidang pertanian maupun non pertanian. menempati peringkat kedua bencana paling sering di Aceh. Salah satu metode dapat digunakan menganalisa dan merepresentasikan tingkat kekeringan suatu wilayah adalah indeks SPI (Standardized Precipitation Index). Penelitian ini bertujuan untuk mengetah...

Climate change is projected to have a significant impact on temperature and precipitation profiles in the Mediterranean basin. The incidence and severity of drought will become commonplace and this will reduce the productivity of rain-fed crops such as durum wheat. Genetic diversity is the material basis for crop improvement and plant breeding has exploited naturally occurring variation to deli...

Drought, one of the most important abiotic stress factors limiting biomass, significantly reduces crop productivity. Salinization also affects the productivity of both irrigated and rain-fed wheat crops. Species of genus Aegilops can be considered crop wild relatives (CWR) of wheat and have been widely used as gene sources in wheat breeding, especially in providing resistance to pests and disea...

The effects of two levels of irrigation water (100%, 60%) and buried underground pipe depths (0.8 m, 0.6 m) under rain shelters' conditions on yield and some quality parameters of tomato were investigated. A fully randomized factorial experiment was conducted between April and August in 2011 and 2012 at Hohai University. It was found that drainage treatments enhanced biomass production, whereas...

introduction: weather features and their variations have an important role in the yield of agricultural products, especially in rain-fed conditions. the main metrological variables that affected yields consist of precipitation, temperature, soil moisture and solar radiation. also, drought is one of the major constraints to production, especially the mid-season drought which occurs during the po...

Occasional strong droughts are an important feature of the climatic environment of tropical rain forest in much of Borneo. This paper compares the response of a lowland dipterocarp forest at Danum, Sabah, in a period of low (LDI) andaperiodofhigh (HDI) drought intensity (1986–96,9.98y;1996–99,2.62y).Meanannual drought intensity was two-fold higher in the HDI than LDI period (1997 v. 976mm), and...

During 1877 and 1878 much of China was struck by famine, due to a severe drought. More than nine million people perished. In India, at the same time, more than eight million deaths were attributed to famine also caused by a drought. In many districts, a quarter of the population died. Drought in the same period also caused crop failures, scarcity of food or even famine, in north-eastern Brazil,...

Lack of access to insurance exacerbates the impact of climate variability on smallholder famers in Africa. Unlike traditional insurance, which compensates proven agricultural losses, weather index insurance (WII) pays out in the event that a weather index is breached. In principle, WII could be provided to farmers throughout Africa. There are two data-related hurdles to this. First, most farmer...

Studies of the desiccation tolerance of the seedlings of five tropical trees were made on potted plants growing in a greenhouse. Pots were watered to field capacity and then dehydrated for 3 to 9 weeks to reach various visual wilting stages, from slightly wilted to dead. Saturated root hydraulic conductance was measured with a high-pressure flowmeter, and whole-stem hydraulic conductance was me...

summer heat and drought conditions, especially in the southern half of iran's air sovereignty is recognized. in order to investigate the synoptic conditions - scanning the effect of unusual rain event for summer 12 to 6 september 2008 (22-16 september 1387) in the southern zagros range, environmental approach to sightseeing and daily statistics recording station 270 days of rain detected. ...