SUKARTONO, Sukartono. S NUTRIENTS RTENTION OF SEVERAL BIOCHARS AND THEIR EFFECT ON N,P, K UPTAKE OF UPLAND-RICE .. CROP AGRO, Scientific Journal of Agronomy, [S.l.], v. 12, n. 01, p. 9-19, feb. 2019. ISSN 2621-5748. Available at: <https://cropagro.unram.ac.id/index.php/caj/article/view/247>. Date accessed: 23 july 2024. doi: https://doi.org/10.29303/caj.v12i01.247.