Water stress effects on growth, development and yield of opium poppy (Papaver somniferum L.)

submitted by Chamilani 2 years and 10 months ago - Topic: Geography

The effects of pre-anthesis water deficit and cycle length were examined in Papaver somniferum L., cultivated for alkaloid production, in two locations in southern Spain. The vegetative period was shortened by extending the photoperiod through supplemental lighting in the field, while water deficit in pre-anthesis was induced by avoiding irrigations and installing rain shelters. The treatments were: IN (irrigated-normal photoperiod), IL (irrigated-hastened flowering), DN (water deficit in pre-anthesis-normal photoperiod) and DL (water deficit in pre-anthesis and hastened flowering). The artificial photoperiod hastened the flowering by 15 and 21 days, for irrigated and deficit treatments respectively. Seasonal evapotranspiration (ET) ranged from.

submitted by biishiqaaeo 1 year and 4 months ago - Topic: Geography

The scarcity of irrigation water is one of the major causes of low productivity and decline of citrus orchards. The present study was planned with a hypothesis that the drip irrigation (DI) could save a substantial amount of water over surface irrigation, besides improving the yield of citrus pla...

Influence of artificially restricted rooting depth on soybean yield and seed quality

submitted by welcos3221 1 year and 3 months ago - Topic: Geography

The amount of plant available soil water is strongly influenced by soil type and rooting depth. This study was conducted to investigate the influence of limited plant available soil water on soybean (Glycine max(L.) Merr.) yield and seed composition. Six soybean cultivars were grown in 27, 28, an...

Crop water stress index for assessing irrigation scheduling of drip irrigated broccoli (Brassica oleracea L. var. italica)

submitted by Chamilani 2 years and 7 months ago - Topic: Geography

This study was conducted to determine the possibility of a crop water stress index (CWSI) to schedule irrigation for broccoli (Brassica oleracea L. var. italica) grown with drip irrigation during the spring and autumn cultivation periods of 27. The effects of five irrigation levels which were app...

Effects of deficit irrigation on the yield and yield components of drip irrigated cotton in a mediterranean environment

submitted by joera 2 years and 5 months ago - Topic: Geography

A field study on cotton (Gossypium hirsutum L., cv.) was carried out from 25 to 28 in the Çukurova Region, Eastern Mediterranean, Turkey. Treatments were designated as I1 full irrigation; DI7, DI5 and DI which received 7, 5, and % of the irrigation water amount applied in the I1 treatment. The i...

Olive yield as a function of soil moisture dynamics

submitted by monceit 2 years and 2 months ago - Topic: Geography

This study introduces a water-driven crop model aiming to quantitatively link olive yield to climate and soil moisture dynamics using an ecohydrological approach. A mathematical model describing soil moisture, evapotranspiration and assimilation dynamics of olive orchards is developed here. The m...

Long-term growth, water consumption and yield of date palm as a function of salinity

submitted by safeo 1 year and 8 months ago - Topic: Geography

Actual measurements of water uptake and use, and the effect of water quality considerations on evapotranspiration (ET), are indispensable for understanding root zone processes and for the development of predictive plant growth models. The driving hypothesis of this research was that root zone str...

A partial root zone drying irrigation strategy for citrus—Effects on water use efficiency and fruit characteristics

submitted by PabSha 1 year and 8 months ago - Topic: Geography

In Australian irrigated citriculture, fruit yield and quality outcomes are not tightly related to levels of plant available water, which raises the possibility of using mild water stress applied to part of the root zone, i.e. partial root zone drying, to stimulate physiological mechanisms that re...

Effects of fixed partial root-zone drying irrigation and soil texture on water and solute dynamics in calcareous soils and corn yield

submitted by ftamin 1 year and 7 months ago - Topic: Geography

Water dynamics and salt distribution in the soil were studied under Fixed Partial Root zone Drying irrigation (FPRD) conditions in corn fields in Northern Greece. FPRD irrigation technique was applied without deficit treatment in two calcareous soils, a sandy clay loam and a sandy loam. Soil wate...

Comparison of transient state models that include salinity and matric stress effects on plant yield

submitted by DavioDavia 1 year and 5 months ago - Topic: Geography

Transient-state models that account for continually changing salinity and matric stress on crop yields have been developed by several research groups. The objective of this research was to compare the simulated yields of forage corn obtained from a common set of soil and water conditions for ENVI...

Alleviation of drought stress in winter wheat by late foliar application of zinc, boron, and manganese

submitted by YairGonz 1 year and 4 months ago - Topic: Geography

In many regions, drought during flowering and grain-filling inhibits micronutrient acquisition by roots resulting in yield losses and low micronutrient concentrations in cereal grains. A field and a greenhouse experiment were conducted to study the effect of foliar applications of zinc (Zn), boro...