Accurate estimation of pan evaporation (Ep) is vital for the development water resources and agricultural management, especially in arid semi-arid regions where it restricted to set up facilities measure accurately consistently. Besides, using estimating models coefficient (kp) a classic method assess reference evapotranspiration (ET0) which indispensable crop growth, irrigation scheduling, eco...

background and objectives: drought stress is one of the most important environmental factors reducing growth and yield of crops, especially in arid and semiarid regions of the world. during drought stress, nutrient uptake diminishes due to rising of solute concentrations and so increasing of osmotic potential in the root zone. with increasing soil ph, micronutrient uptake decreases more than ot...

A field experiment was conducted at Precision Farming Development Center, college farm, of agriculture, Rajendranagar, Hyderabad during kharif, The laid out in split plot design with three drip irrigation levels as main treatments (viz., I1- Drip 1.0 E pan, I2- 0.8 I3- 0.6E pan) and four mulches M1-No mulch, M2- Paddy straw, M3- Black plastic M4- Dried leaves) sub were replicated thrice. experi...

The evaporation losses are very high in warm-arid regions and their accurate evaluation is vital for the sustainable management of water resources. assessment such involves extremely difficult original tasks because scarcity data countries with an arid climate. main objective this paper to develop models simulation pan-evaporation help Penman Hamon’s equations, Artificial Neural Networks (ANNs)...

in order to evaluate the utilization ability of drought resistance indices such as: yield index (yi), yield stability index (ysi), stress susceptibility index (ssi), tolerance (tol), mean productivity (mp), geometric mean productivity (gmp) and stress tolerance index (sti) in sunflower hybrids, three separate experiments were conducted as randomized complete block design at the research field o...

the beet armyworm, spodoptera exigua, is one of the most important pests of sugar beet in iran. the aim of this study was to determine the effect of water and nitrogen treatments of sugar beet planton developmental time and fecundity life table parameters of the pest. an experiment was carried out under laboratory conditions (25±2oc, 70±5% r.h. and 12l: 12d) on larvae reared on sugar beet leave...

The Subarctic comprises the higher mid-latitudinal regions with short, cool, moist summers and long, cold, dry winters. Indeed, the short, cool growing season is often thought of as a barrier to crop growth and diversity in these regions. Little is known, however, concerning the impact of the Subarctic climate on crop production. This study aimed to identify the climatic factors that are most i...