Development of Soil Profile Temperature Prediction Models for Bare and Solarized Field Conditions
Razvoj modela za predviđanje temperature zemljišnih profila u ogoljenim i osunčanim poljskim uslovima
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Author
Chauhan, Harshvardhan
Dhruj, I.U.
Chauhan, P.M.
Keywords
soil solarizationsoil profile temperature
energy balance equations
mathematical models
model efficiency
osunčanje zemljišta
temperature zemljišnog profila
jednačine bilansa energije
matematički modeli
efikasnost modela
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Soil solarization is a simple and effective technique for controlling problems like weeds and soil borne pathogens by means of increasing moist soil temperature through trapping heat by using the thin transparent polyethylene sheet for few weeks. The soil temperature models ‘SOILTEMP’ were developed to predict the diurnal variation of soil profile temperature at various depths for solarized (mulch covered) and bare soil by incorporating different types of input data. The accuracy of models was evaluated using model efficiency coefficient (E). Except for bare soil at 15 cm depth, positive values of E were obtained whereas at 15 cm depth for bare soil negative E values of E were observed. The highest E=0.92 was obtained at 5 cm depth for solarized soil and weekly average data whereas lowest one (E= 0.39) obtained at 10 cm depth for bare soil and biweekly data. The developed models will be useful to predict the soil profile temperature and to study the effect of various input parameters to achieve desired effect of soil solarization without conducting the experiments and thereby to save cost and time. Osunčanje zemljišta je jednostavna i efikasna tehnika za kontrolu problema kao što su korovi i patogeni koji nastaju u zemljištu, povećavanjem temperature vlažnog zemljišta zadržavanjem toplote tankom providnom polietilenskom folijom na nekoliko sedmica. Modeli zemljišne temperature “SOILTEMP” su razvijeni da bi se predvidele dnevne varijacije temperature zemljišnog profila na različitim dubinama za osunčano (pokriveno malčom) i ogoljeno zemljište uključivanjem različitih ulaznih podataka. Tačnost modela je ocenjivana upotrebom koeficijenta efikasnosti modela (E). Izuzev ogoljenog zemljišta na dubini od 15 cm, gde je dobijena negativna vrednost koeficijenta E, u ostalim slučajevima su dobijene pozitivne vrednosti. Najviša vrednost E=0.92 je postignuta na dubini od 5 cm na osunčanom zemljištu sa sedmičnim srednjim vrednostima, gde je najniža (E= 0.39) dobijena na dubini od 10 cm za ogoljeno zemljište i dvonedeljne podatke. Razvijeni modeli će biti korisni za predviđanje temperature zemljišnog profila i proučavanje uticaja različitih ulaznih parametara radi postizanja željenog efekta osunčanja zemljišta bez izvođenja ogleda, što smanjuje troškove i štedi vreme.