Chronicle of design,construction, and operation

In the Ministry of Power and Electrification of the USSR

Chronicle of design, construction, and operation     

Chronicle of important events in water management,reclamation, and water supply

In the Ministry of Power and Electrification of the USSR

Chronicle of important events in water management, reclamation, and water supply     

Congratulations from the central committee of the communist party of the Soviet Union and USSR Council of Ministers to builders,assemblers, designers,mechanical engineers,and all participants in the construction of the Zeya hydroelectric station

Papers

Congratulations from the central committee of the communist party of the Soviet Union and USSR Council of Ministers to builders, assemblers, designers, mechanical engineers, and all participants in the construction of the Zeya hydroelectric station     

Spectral Reflectance,Growth and Chlorophyll Relationships for Rice Crop in a Semi-Arid Region of India

Relations among spectral reflectance, chlorophyll a, and growth of rice plants grown on irrigated light textured soil in a semi arid region are presented here. There was a linear relation between spectral reflectance and rice plant height (r = 0.97), for band 1 (0.45–0.52 m) reflectance values. On the other hand, in bands 2 (0.52–0.60 m) and 3 (0.63–0.69 m), reflectance values decreased until 70 days after planting (DAP) and then increased during the reproductive phase of the crop. The near infrared band 4 (0.76–0.90 m) showed a maximum reflectance at 59 DAP (panicle initiation stage) and a decline in reflectance thereafter through maturity. The peak value of IR/R ratio was 16.39 at 62 DAP during the early reproductive phase; thereafter, it declines gradually with the maturity of the crop. Chlorophyll a concentration was high during early growth (vegetative and early reproductive stages) and decreased during the flowering and maturity stages. The rice plant canopy show a high chlorophyll a concentration at 64 and 59 DAP for sites A and B, respectively. Chlorophyll a concentration is higher in site A plant canopies than it is in site B during the entire crop cycle. A good inverse correlation (r = 0.91) has been found between chlorophyll a and band 1, while the IR/R ratio and the normalised difference vegetation index (NDVI) showed a relationship (r = 0.78) with the chlorophyll a concentration during the crop cycle. Band 2, 3 and 4 radiance values show a biphasic linear relationship with chlorophyll a concentrations, negative for early growth and positive for flowering and maturity stages. Results indicate that the period between 66 to 70 DAP is most suitable for the assessment of rice crop yield, based on chlorophyll a concentration.     

Andrei Naumovich Rakhmanov

Obituaries

Andrei Naumovich Rakhmanov     

Boris Vladimirovich Proskuryakov

Obituaries

Boris Vladimirovich Proskuryakov     

Lower Kama hydrofacility

Papers

Lower Kama hydrofacility     

Contents of Volume 17

Volume Contents

Contents of Volume 17     

Evgenii Pavlovich Karpov

Obituary

Evgenii Pavlovich Karpov     

Fedor Grigor'evich Gun'ko

Obituaries

Fedor Grigor'evich Gun'ko     

Adol'f Davidovich Al'tshul'

Obituary

Adol'f Davidovich Al'tshul'     

Corrigendum

Corrigendum

Corrigendum     

Leonid Semenovich Zhivotovskii

Obituary

Leonid Semenovich Zhivotovskii     

Vladimir Ivanovich Sevast'yanov

Obituary

Vladimir Ivanovich Sevast'yanov     

Ivan Pavlovich Denisov

Reviews

Ivan Pavlovich Denisov     

Memoir of Petr Mikhailovich Nyrkov

Chronicles

Memoir of Petr Mikhailovich Nyrkov     

Aleksandr Dmitrievich Khalturin

Obituary

Aleksandr Dmitrievich Khalturin     

Anatolii Nikolaevich Patrashev

Obituary

Anatolii Nikolaevich Patrashev     

Anatolii Ivanovich Bogomolov

Chronicles

Anatolii Ivanovich Bogomolov     

Dmitrii Sergeevich Shchavelev

Obituary

Dmitrii Sergeevich Shchavelev