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SKRIPSI PENGARUH RUAS STEK PUPUK DAN DOSIS PUPUK KALIUM PENGARUHNYA TERHADAP HASIL UBI JALAR (IPOMEA BATATAS (L) LAMB
An experiment to study the effect of dose of nitrogen (N) fertilizer on intencity of leaf spot attack (Cercospora sp) on peanut varieties (Arachis hypogeae L) had been carried out from 7 September 1995 until 29 Desember 1995 in Girirejo quarter, Tegalrejo sub distric, Magelang Regency. The soil is latosol with pH 6,5 and the elevation 320 meters to the sea level.
The design is factorial with Randomized Completely Block Design (RBCD), consist of 2 factors and 3 replications. Factor 1. Varieties, that is Gajah variety, Lokal variety, kelinci variety. Factor II. dose of nitrogen, that is 0, 20, 40 and 60 kg/ha. The result of the experiment showed that variety very significant to percentase of attack disease, total of filled peanut, weight of fresh peanut, fresh weight of straw and dry weight of straw. The dose of nitrogen fertilizer showed very significant to total of filled peanut, fresh weight of peanut, dry weight of straw
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