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The invisible farmers
1983
Sachs, Carolyn E.
Studie naar de rol van vrouwen in de landbouw vanuit historisch perspectief, in het bijzonder voor de Verenigde Staten
Показать больше [+] Меньше [-]Zoohygienic investigations in two types of cowsheds for fatstock. Part 2. Microbiological and dust contamination of air [Poland]
1983
Rokicki, E. | Roga-Franc, M. | Maslowska, I. | Kosla, T. | Russak, G. (Warsaw Agricultural Univ., Warsaw (Poland). Dept. of Zoohygiene and Prophylaxis in Animal Production)
Zoohygienic investigations of microbiological and dust contamination of air were carried out in two types of cowsheds designed for fatstock on a state farm "S" in winter and summer 1977. The investigations were carried out in buildings of Opole and Bialystock types. The buildings differed in building material used for construction and the designs of the sewage systems. In the air the total number of bacteria was determined as well as the number of hemolyzing bacteria, Escherichia coli, the number of fungi and the degree of dustiness
Показать больше [+] Меньше [-]Organisation of rice-seed production in agricultural cooperatives and collective agricultural production
1983
Ho Dac Song | Tran Ngoc Trang | Trong An (Compagnie des Semences, Hanoi (Viet Nam))
Risk management in agricultural production
1983
Jolly, R.W.
Extract: This paper considers managerial response to risk from an operational perspective. I will describe briefly the farm management process and consider how the assessment and control of risk might be incorporated. My primary motive, however, is to use this framework as a means to identify economic research and extension problems that must be addressed if the managerial skills of agricultural decision makers are to be improved.
Показать больше [+] Меньше [-]Emerging technologies in agricultural production
1983
Lu, Yaoji
Risk in agricultural production: discussion.
1983
Chambers R.G.
Role of pedology in agricultural production.
1983
Umemura H.
Agricultural production and development in Iraq
1983
Radhi, M.S. (Baghdad Univ. (Iraq). Coll. of Agriculture) | Douglah, M.
[Agricultural and meteorological considerations on agricultural production in tropical countries]
1983
Nicastro, C. (Pisa Univ. (Italy). Facolta di Agraria) | Tanzi, M.
The crop is to perform two functions in order to carry out its biological cycle - a metabolic one and a biophysical one - consisting of a continual heat exchange between the crop and its surrounding environment. The crop temperature always rises whenever the crop receives a higher amount of heat than it can transfer to its surrounding environment. Catabolic processes are speeded up, consequently the crop yield decreases. That circumstance is a usual feature of tropical areas. On the other hand, the crop yield turns out to be very high whenever a fair balance between heat received and heat transferred is achieved. That circumstance is a usual feature of temperate areas. As a consequence, agrometeorological researchers aiming at investigating the crop yield as their primary target, are concerned to be closely acquainted with microclimatic conditions of the crop environment so that they can properly set them in the general climatic situation shown by the meteorological station. | L'ambiente nel quale vive la pianta consta di tre settori: (1) situato al disopra della vegetazione, e formato prevalentemente di atmosfera; (2) immediatamente sotto il primo settore, e formato dalle piante e dall'atmosfera tra esse confinata; e (3) piu in basso, e formato prevalentemente dal terreno. Questi tre settori in relazione alla densita, disposizione delle foglie, ecc. ricevono quote diverse di energia solare. Di conseguenza il profilo verticale del blocco di vegetazione presenta situazioni microclimatiche diverse che si ripercuotono sui vari processi biofisici-chimici e quindi sulla produzione finale.
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