in order to study the effect of spraying of abscisic acid on yield and yield components of chickpea (cicer arietinum l.) under rainfed and supplementary irrigation, a field experiment was conducted in 2010 in agricultural research station of ilam university. a split factorial experiment based on a randomized complete block design was conducted. main plots were composed of two levels of irrigati...

In order to assist in high-yield agricultural management multiple cropping systems, it is essential understand the link between rainy season onset and crops sowing dates, since considerably affects management, yield output. We built crop calendars derived from remote sensing products investigated dates of irrigated rainfed agriculture Western Bahia, a new important frontier Brazilian Cerrado. C...

Effects of seed rates on grain, straw and oil yield of safflower (Carthamus tinctorius L.) were studied for two years in the semi-arid central Bekaa Valley of Lebanon. Three trials, two under rainfed and one under supplementary irrigations, were conducted using seed rates of 6, 12, 24 and 48 kg ha -1 corresponding to intra-row spacing of 20, 10, 5, and 2.5 cm, respectively. There was significan...

Nitrous oxide is an important greenhouse gas and contributes to stratospheric ozone destruction, but still little is known about emissions of this trace gas from soils in semiarid environments and how emissions are affected by irrigation. Therefore, nitrous oxide emissions from a runoff-irrigated and rainfed endosodi-calcaric Fluvisol in the semiarid northwest of Kenya were measured using the c...

A river flow regime describes an average seasonal behaviour of flow and reflects the climatic and physiographic conditions in a basin. Differences in the regularity (stability) of the seasonal patterns reflect different dimensionality of the flow regimes, which can change subject to changes in climate conditions. The empirical orthogonal functions (EOF) approach can be used to describe the intr...

Twenty-year-old "Chemlali" olive trees trained to vase and rainfed were investigated in either "on" (2004) or "off" (2003) year. A randomized block design with three blocks and three treatments was used and each experimental plot consisted of nine olive trees. Three treatments were applied: (1) rainfed conditions (RF, used as control treatment); (2) irrigation with well water (WW); and (3) irri...

The objective of this study was to evaluate the performance of the FAO-AquaCrop model in winter wheat in the southern Loess Plateau of China. Multi-year field experimental data from 2004 and 2011 were used to calibrate and validate the model for simulating biomass, canopy cover (CC), soil water content, and grain yield under rainfed conditions. The model performance was evaluated using root mea...

Genotype by environment interaction (GxE) influences and complicates the selection of superior genotypes in trials by confounding the determination of true genetic values. Trials therefore need to be planted over several locations and seasons. The South African Sugarcane Research Institute (SASRI) operates seven regional breeding programmes representing the major agro-climatic regions of the su...

Delay of leaf senescence through genetic modification can potentially improve crop yield, through maintenance of photosynthetically active leaves for a longer period. Plant growth hormones such as cytokinin regulate and delay leaf senescence. Here, the structural gene (IPT) encoding the cytokinin biosynthetic enzyme isopentenyltransferase was fused to a functionally active fragment of the AtMYB...

Genetic analyses and association mapping were performed on a winter wheat core collection of 96 accessions sampled from a variety of geographic origins. Twenty-four agronomic traits were evaluated over 3 years under fully irrigated, rainfed and drought treatments. Grain yield was the most sensitive trait to water deficit and was highly correlated with above-ground biomass per plant and number o...