adha siregar.pdf - Balai Penelitian Tanah
adha siregar.pdf - Balai Penelitian Tanah
adha siregar.pdf - Balai Penelitian Tanah
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28<br />
A. Fatmah Siregar dan W. Hartatik<br />
Gambar 1. Pengaruh perlakuan terhadap kandungan NO3 tanah<br />
Gambar 2. Pengaruh perlakuan terhadap kandungan NH4 tanah