Behavior of the menstrual cycle and fertility in milking cows after administration of chlormadinoneacetate (CAP) at the time of second insemination     

E Grunert  C Hellge 《Berliner und Münchener tier?rztliche Wochenschrift》1971,84(6):101-103

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Immunological studies in the cat. Attempts to induce delayed hypersensitivity     

I D Aitken  H B McCusker 《Research in veterinary science》1969,10(2):208-213

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The veterinary surgeon of a cooperative farm (Klavdiia Dmitrievna Golikova)     

P V Ada?kin  M Koptilkin 《Veterinariia》1969,46(4):14-15

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Mixed hemadsorption technique for study of avian leukosis-sarcoma viruses: studies with avian leukosis viruses     

C R Rossi  D Segre 《American journal of veterinary research》1969,30(5):831-836

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Hydrocyanic acid poisoning in cattle caused by grazing on sugar cane (Saccharum officinarum) and supplemental feeding of fruits of the algarrobo tree (Prosopis juliflora)     

H S Seifert  K A Beller 《Berliner und Münchener tier?rztliche Wochenschrift》1969,82(5):88-91

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Mechanism of selective toxicity: absorption and detoxication of an antibiotic, ascochitine, by sensitive and insensitive fungi     

T Nakanishi  H Oku 《Phytopathology》1969,59(11):1563-1565

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Methyl 2-benzimidazolecarbamate, a fungitoxic compound isolated from cotton plants treated with methyl 1-(butylearbamoyl)-2-benzimidazolecarbamate (benomyl)     

J J Sims  H Mee  D C Erwin 《Phytopathology》1969,59(11):1775-1776

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THE BASIS OF THE DIFFERENTIAL PHYTOTOXICITY OF 4-HYDROXY-3,5-DI-IODOBENZONITRlLE*     

P. J. DAVIES  D. S. H. DRENNAN  J. D. FRYER  K. HOLLY 《Weed Research》1968,8(3):233-240

Summary. Entry of ioxynil-¹⁴C into portions of leaves was greater with mustard than with barley or pea and was unrelated to stomatal density. Measurement of ioxynil content of sprayed plants showed that by increasing the concentration of ioxynil and adding a surfactant, almost as much ioxynil could be made to enter barley as entered mustard from a lower concentration without surfactant. Auto radiographs showed that a limited amount of ¹⁴C was translocated to a small extent in plants following localized application of ioxynil-¹⁴C. An experiment comparing leaf removal by cutting with destruction of equivalent leaf areas by ioxynil treatment suggested a greater translocated effect of ioxynil with mustard than with pea or barley. Les principes de la phytotoxicité différentielle du 4-hydroxy-3,5-di-iodobetZonitrile II. Absorption et migration  相似文献   

ADSORPTION AND DESORPTION OF SIMAZINE BY SOME ROTHAMSTED SOILS     

J. D. H. WILLIAMS 《Weed Research》1968,8(4):327-335

Summary. The adsorption of simazine from, and subsequent desorption into, 0–01 M calcium chloride solution was investigated using twenty-three Rothamsted soil samples from sites differing greatly in cropping history and manurial treatment. Organic carbon content was the only factor related to the ability of the soils to sorb simazine; this accounted for 90% or more of the variation between soils Equilibrium was attained during adsorption in from fewer than 2 to more than 24 hr. Equilibrium during desorption was only occasionally attained within 24 hr. Differences between theoretically predicted and measured concentrations of simazine in solution following desorption were least for soils that attained equilibrium fastest during adsorption. Differences in adsorption and desorption kinetics between soils could not be related to soil pH, organic carbon content or cropping and manuring history. Comparisons of unlimed and limed soils suggested that no simnazine was lost by acid hydrolysis during the experiments.
Adsorption et désorption de la simazine par quelques sols de Rothamsted  相似文献   

EFFECT OF PARAQUAT ON MICROBIAL ACTIVITIES IN SOILS*     

C. M. TU  W. B. BOLLEN 《Weed Research》1968,8(1):28-37

Summary. When paraquat was added to four different soils, nitrification was not appreciably affected but ammonification of soil organic-matter nitrogen was slightly retarded. Carbon dioxide evolution as well as oxygen consumption was used as an index of metabolic activity of soil micro-organisms and paraquat had a stimulatory effect at higher concentrations. Oxidation of added sulphur was slightly depressed. Paraquat decreased both the total mould and bacterial populations in Chehalis silt loam. After 30 days incubation the percentages of Streptomyces and Penicillia were markedly increased by most treatments but were little affected in Chehalis silt clay and Woodburn soils. Except for the temporary suppression of nitrification, paraquat had no significant influence on general microbial activities of importance to soil fertility. Some bimodal effects or toxicity inversions were observed with intermediate concentrations. Effet du paraquat sur les activités microbiennes dans les sols  相似文献