Soybean Response to Organic Fertilizer Types in Pine Stand-Based Agroforestry System

Abstract

The agricultural sector currently produces about 18.4% of the total emissions of greenhouse gases that cause climate change. This impact causes a decrease in the quality and quantity of agricultural products such as soybeans. One of the efforts to increase soybean production is by agroforestry systems. This research to examine the response of soybeans to organic fertilizers from various agricultural wastes in a pine-based agroforestry system. The research design used a completely randomized block design with one treatment fertilization with four levels, namely chemical fertilizers; Indigofera tinctoria compost; corn cobs compost; peanut green manure. The type of organic fertilizer affects plant height, total chlorophyll, plant biomass, number of pods planted, and seed yield per hectare. Peanut green manure showed the highest seed yield per hectare at 1.4887 tons.ha−1. The highest plant height in peanut green manure. Meanwhile, with corncob compost, the highest number of pods planted was 14.60 pods. Total chlorophyll reached 1.912931 cd.m−2 in the treatment of corn cobs compost. Chlorophyll a was positively correlated with chlorophyll, while plant fresh weight was positively correlated with seed weight per hectare. Agricultural waste can be used as organic fertilizer supporting soybean growth and yield in pine stands-based agroforestry systems.

Effectiveness of Peanut Green Manure on Root Growth and Corn Yield in Alfisol Soil

“…The application of 12.5 tons/ha of peanut green manure resulted in the highest number of leaves, which was 12.17 leaves. This is due to the high nitrogen content in peanut green manure, which improves the condition of less fertile soil and provides nitrogen for the corn plants [16].…”

“…Organic fertilizers encompass a wide range, including compost [13], animal manure [14], and green waste [15]. Peanut residue, a type of green fertilizer, can be utilized as a soil amendment to bolster growth and yield [16]. Being a legume, peanuts can engage in a symbiotic relationship with microorganisms, potentially enhancing microbial activity in Alfisol when added as fertilizer [17].…”

“…Moreover, peanuts contain flavonoids, which attract nitrogen-fixing bacteria [18]. The high nitrogen content in peanut fertilizer supports plant growth and yield [16], and its addition can increase the soil's organic matter content, promoting water and nutrient retention [19].…”