Increasing of corn yield on ultisol with variable change by applying some soil amendments: I. nutrient uptake and plant growth
2000
Sufardi (Universitas Syiah Kuala Darussalam, Banda Aceh (Indonesia). Fakultas Pertanian)
Charge characteristics of soils are of central importance in soil management because the majorities of the reactions that control nutrient availability are dependent upon the physicochemical processes that occur at the soil particle surface. The green house experiment has been conducted to study the effects of some soil amendments in improving the production of corn, especially in evaluating the effects of those materials on nutrient uptake by corn and plant growth on ultisol soil with variable change. The soil materials (acid fine clay soil) that used in the experiment were taken from surface (top 20-cm layer). A factorial randomized design with three replications was used in the study. Two sources of soil amendement were compost and lime (CaCO3). Each soil amendment was consisted of three levels of dosages (0, 4, and 8 Mg/ha) that was combined with three levels of phosphate fertilizer (0.05, 0.10 and 0.15 Mg P/ha). Result of the study shows that soil amendment treatment significantly affects on nutrient uptake by corn. The concentrations of N, P, K, Ca, and Mg in the plant tissue were greater at the soil amanded (compost, CaCO3) than the unamanded soil. Effects of phosphate fertilizer on corn growth varied depend on source of soil amendment. Use of lime with high dosage more of 8 MgCaCO3/ha tended to decrease of N and K uptakes
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