Influence of continuous and periodic soil water conditions on root necrosis of holly caused by Pythium spp.

1970 ◽  
Vol 48 (9) ◽  
pp. 1641-1645 ◽  
Author(s):  
J. A. Biesbrock ◽  
Floyd F. Hendrix Jr.
Keyword(s):  
Soil Temperature ◽  
Soil Water ◽  
Water Saturation ◽  
Root Damage ◽  
Root Necrosis ◽  
Water Conditions ◽  
Prolonged Duration ◽  
Soil Temperatures ◽  
Soil Water Conditions ◽  
Soil Water Saturation

Root damage in Helleri holly induced by P. vexans was affected more by differences in soil water saturation capacities (70 and 90%) than by differences in mean soil temperatures (18, 24, and 30 °C). By contrast, root damage in Helleri holly induced by P. irregulare was affected more by differences in mean soil temperatures than by differences in soil water saturation capacities. Root damage in Convexa holly induced by P. vexans was affected more by a periodic saturation of prolonged duration than by differences in soil temperatures. By contrast, root damage in Convexa holly induced by P. irregulare was affected more by differences in soil temperature than by periodic saturations of prolonged and unprolonged durations.<

RESPONSE OF PEAS TO ENVIRONMENT: IV. EFFECT OF FIVE SOIL WATER REGIMES ON GROWTH AND DEVELOPMENT OF PEAS

1968 ◽  
Vol 48 (2) ◽  
pp. 129-137 ◽  
Author(s):  
A. R. Maurer ◽  
H. F. Fletcher ◽  
D. P. Ormrod
Keyword(s):  
Water Stress ◽  
Soil Water ◽  
Growth And Development ◽  
Dry Matter ◽  
Fresh Weight ◽  
Water Regimes ◽  
Severe Water Stress ◽  
Water Conditions ◽  
Before And After ◽  
Soil Water Conditions

Pea plants growing in "weighing lysimeters" were subjected to five soil-water regimes to determine their response to varying conditions of soil water imposed at different stages of development. Plants subjected to a minimal water stress developed luxuriantly and continued to grow up to the harvest period. Pea yield and plant height were not reduced, but fresh weight and dry matter were less if irrigation was applied when soil water fell to 60% rather than 88% of that available. A severe water stress after blossom reduced pea yield, irrespective of soil-water conditions prior to blossom. Plants which had been given ample soil water before blossom wilted visibly when a severe stress was imposed in the post-blossom period, yet wilting did not occur in plants subjected to severe water stress both before and after blossom. Severe water stress prior to blossom did not cause a decrease in pea yield if ample soil moisture was made available after blossom.

scholarly journals ОКРЕМІ ПИТАННЯ АНАЛІЗУ УШКОДЖЕНЬ БУДІВЕЛЬНИХ ОБ’ЄКТІВ ВЕЛИКОЇ ПЛОЩІ

2018 ◽  
pp. 356-364
Author(s):  
Марек Дохойда ◽  
Йоанна Вітковска-Добрев
Keyword(s):  
Soil Water ◽  
Expansion Joints ◽  
Concrete Shrinkage ◽  
Design And Implementation ◽  
Water Conditions ◽  
Complex Engineering ◽  
Soil Water Conditions ◽  
Bottom Slab

У роботі представлений перелік проблем, що супроводжують будівельні об'єкти великої площі, в тому числі й підземні гаражі. Здійснено технічний аналіз окремих проблем, що виникають в таких будівлях під час їх експлуатації. Проектування, а пізніше і будівництво підземних гаражів найчастіше, пов'язане з вирішеням складних інженерних питань. Згідно з ними до найпоширеніших конструкційних недоліків у підземних гаражах віднесні: тріщини нижньої плити, порушення поверхових перекриттів, невластиве кручення бетону, відсутність дилатації або також помилково прийняті ґрунтово-водні умови.The paper concerns complex engineering challenges associated with multi-storey underground car parks. An analysis of selected issues in underground garages during the exploitation was performed. The design and implementation of structures of which function are underground garages is most often associated with serious engineering challenges. For structural reasons frequently occurring faults in garages may include fracture of the bottom slab and intermediate floors resulting from improper design of reinforcement, concrete shrinkage, lack of expansion joints or incorrectly adopted soil-water conditions.

Effects of zinc fertilizer on maize yield and water-use efficiency under different soil water conditions

2020 ◽  
Vol 248 ◽  
pp. 107718 ◽  
Author(s):  
Li Zhang ◽  
Minfei Yan ◽  
Hongbing Li ◽  
Yuanyuan Ren ◽  
Kadambot HM Siddique ◽  
...  
Keyword(s):  
Water Use Efficiency ◽  
Soil Water ◽  
Water Use ◽  
Maize Yield ◽  
Water Conditions ◽  
Zinc Fertilizer ◽  
Use Efficiency ◽  
Soil Water Conditions
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