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SKRIPSI PENGARUH FREKWENSI PENGOLAHAN TANAH DAN BERAT MULSA JERAMI TERHADAP SERANGAN HAMA LALAT KACANG ( Agromyza phaseoli Tryon) PADA TANAMAN KEDELAI (Glycine max (L) Merril ) VARIETAS WILIS
              ABSTRACT
          The objective of this research to know the influence 
of frequency tillage system and weight mulch of stubble 
on attack pest bean fly at plant soyae and Wilis variety. 
This research was carried out at Kedungsari village, 
district North Magelang, in the region of Magelang from
 November 25, 1992 until February 25, 1993. The soil type 
is latosol, its elevation is 350 meters above sea level. 
The research Pactorial method use with Randomized
 Completely Block Design (RCED) by two treatment. Those 
weight of stubble mulches (M) and frequency tillage
 system (P) with three repetitions. The kind of treatment 
are Mo (unmulching), M. (weight mulch 1,5 kilogrammes),
 Mâ‚‚ (weight mulch 3 kilogrammes), Ma (weight mulch 
4,5 kilogrammes), Po (untillage), F,â‚ (once tillage) and 
P2 (two tillage). 
       The utilisation of stubble such like covered soil
 with 3 kilogrammes weight effective for controlled 
bean fly attack, and so highest produce of filled pods. 
The lowest of number died plant does utilize with
 4,5 kilogrammes weight of stubble mulch.
          The tillage system doesn't effective on controlled 
bean fly attack, its pressure of died plant, and aren't
 increase the number filled pods, dry weight of seed,
 weight of 100 seeds, fresh weight of straw and dry
 weight of straw. The highest yields are 3.742,4 kilogrames
 per hektar dry weight of needs as 3.0 kilogrammes stubble 
mulch and once tillage.            
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